Index Terms

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0300 ATMOSPHERIC COMPOSITION AND STRUCTURE


   0305 Aerosols and particles (0345, 4801, 4906)
   0310 Airglow and aurora
   0312 Air/sea constituent fluxes (3339, 4504)
   0315 Biosphere/atmosphere interactions (0426, 1610)
   0317 Chemical kinetic and photochemical properties
   0319 Cloud optics
   0320 Cloud physics and chemistry
   0321 Cloud/radiation interaction
   0322 Constituent sources and sinks
   0325 Evolution of the atmosphere (1610, 8125)
   0328 Exosphere
   0330 Geochemical cycles (1030)
   0335 Ion chemistry of the atmosphere (2419, 2427)
   0340 Middle atmosphere: composition and chemistry
   0341 Middle atmosphere: constituent transport and chemistry (3334)
   0342 Middle atmosphere: energy deposition (3334)
   0343 Planetary atmospheres (5210, 5405, 5704)
   0345 Pollution: urban and regional (0305, 0478, 4251, 4325)
   0350 Pressure, density, and temperature
   0355 Thermosphere: composition and chemistry
   0358 Thermosphere: energy deposition (3369)
   0360 Radiation: transmission and scattering
   0365 Troposphere: composition and chemistry
   0368 Troposphere: constituent transport and chemistry
   0370 Volcanic effects (4301, 8409)
   0394 Instruments and techniques
   0399 General or miscellaneous

0400 BIOGEOSCIENCES

   0402 Agricultural systems
   0404 Anoxic and hypoxic environments (4802, 4834)
   0406 Astrobiology and extraterrestrial materials
   0408 Benthic processes (4804)
   0409 Bioavailability: chemical speciation and complexation
   0410 Biodiversity
   0412 Biogeochemical kinetics and reaction modeling (0414, 0793, 1615, 4805, 4912)
   0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
   0416 Biogeophysics
   0418 Bioremediation
   0419 Biomineralization
   0420 Biomolecular and chemical tracers
   0422 Bio-optics
   0424 Biosignatures and proxies
   0426 Biosphere/atmosphere interactions (0315)
   0428 Carbon cycling (4806)
   0429 Climate dynamics (1620)
   0430 Computational methods and data processing
   0432 Contaminant and organic biogeochemistry (0792)
   0434 Data sets
   0438 Diel, seasonal, and annual cycles (4227)
   0439 Ecosystems, structure and dynamics (4815)
   0442 Estuarine and nearshore processes (4235)
   0444 Evolutionary geobiology
   0448 Geomicrobiology
   0450 Hydrothermal systems (1034, 3017, 3616, 4832, 8135, 8424)
   0452 Instruments and techniques
   0454 Isotopic composition and chemistry (1041, 4870)
   0456 Life in extreme environments
   0458 Limnology (1845, 4239, 4942)
   0459 Macro- and micropaleontology (3030, 4944)
   0460 Marine systems (4800)
   0461 Metals
   0463 Microbe/mineral interactions
   0465 Microbiology: ecology, physiology and genomics (4840)
   0466 Modeling (1952, 4316)
   0468 Natural hazards (4308)
   0469 Nitrogen cycling
   0470 Nutrients and nutrient cycling (4845, 4850)
   0471 Oxidation/reduction reactions (4851)
   0473 Paleoclimatology and paleoceanography (3344, 4900)
   0475 Permafrost, cryosphere, and high-latitude processes (0702, 0716)
   0476 Plant ecology (1851)
   0478 Pollution: urban, regional and global (0345, 4251, 4325)
   0480 Remote sensing
   0481 Restoration
   0483 Riparian systems (0744, 1856)
   0485 Science policy (6620)
   0486 Soils/pedology (1865)
   0488 Sulfur cycling
   0489 Trace element cycling (4875)
   0490 Trace gases
   0491 Food webs and trophodynamics (4817)
   0493 Urban systems (4325)
   0495 Water/energy interactions (1878)
   0496 Water quality
   0497 Wetlands (1890)
   0498 General or miscellaneous
   0499 New fields (not classifiable under other headings)

0500 COMPUTATIONAL GEOPHYSICS (1980, 3200, 3252, 4307, 4314, 7833)

   0510 Agent-based models
   0515 Cellular automata
   0520 Data analysis: algorithms and implementation
   0525 Data management
   0530 Data presentation and visualization (1994)
   0535 Hardware solutions
   0540 Image processing
   0545 Modeling (1952, 4255, 4316)
   0550 Model verification and validation
   0555 Neural networks, fuzzy logic, machine learning (1942)
   0560 Numerical solutions (4255)
   0594 Instruments and techniques
   0599 General or miscellaneous

0700 CRYOSPHERE (4540)

   0702 Permafrost (0475, 4308)
   0704 Seasonally frozen ground
   0706 Active layer
   0708 Thermokarst
   0710 Periglacial processes
   0712 Cryosol
   0714 Clathrate
   0716 Cryobiology (0475)
   0718 Tundra (9315)
   0720 Glaciers
   0722 Rock glaciers
   0724 Ice cores (4932)
   0726 Ice sheets
   0728 Ice shelves
   0730 Ice streams
   0732 Icebergs
   0734 Icing (aufeis, naled)
   0736 Snow (1827, 1863)
   0738 Ice (1863)
   0740 Snowmelt
   0742 Avalanches (4302)
   0744 Rivers (0483, 1856)
   0746 Lakes (9345)
   0748 Ponds
   0750 Sea ice (4540)
   0752 Polynas (4540)
   0754 Leads (4540)
   0758 Remote sensing
   0760 Engineering
   0762 Mass balance (1218, 1223)
   0764 Energy balance
   0766 Thermodynamics (1011, 3611, 8411)
   0768 Thermal regime
   0770 Properties
   0772 Distribution
   0774 Dynamics
   0776 Glaciology (1621, 1827, 1863)
   0790 Weathering (1625, 1886)
   0792 Contaminants (0432)
   0793 Biogeochemistry (0412, 0414, 1615, 4805, 4912)
   0794 Instruments and techniques
   0798 Modeling (1952, 4316)
   0799 General or miscellaneous

0800 EDUCATION

   0805 Elementary and secondary education
   0810 Post-secondary education
   0815 Informal education
   0820 Curriculum and laboratory design
   0825 Teaching methods
   0830 Teacher training
   0840 Evaluation and assessment
   0845 Instructional tools
   0850 Geoscience education research
   0855 Diversity

0600 ELECTROMAGNETICS

   0604 Antenna arrays
   0609 Antennas
   0614 Biological effects
   0619 Electromagnetic theory
   0624 Guided waves
   0629 Inverse scattering
   0634 Measurement and standards
   0639 Nonlinear electromagnetics
   0644 Numerical methods
   0649 Optics (4264)
   0654 Plasmas
   0659 Random media and rough surfaces
   0664 Reflectors and feeds
   0669 Scattering and diffraction
   0674 Signal processing and adaptive antennas (6974)
   0679 Singularity expansion method
   0684 Transient and time domain
   0689 Wave propagation (2487, 3285, 4275, 4455, 6934)
   0694 Instruments and techniques
   0699 General or miscellaneous

0900 EXPLORATION GEOPHYSICS

   0902 Computational methods: seismic
   0903 Computational methods: potential fields (1214)
   0905 Continental structures (8109, 8110)
   0910 Data processing
   0915 Downhole methods
   0920 Gravity methods (1219)
   0925 Magnetic and electrical methods (5109)
   0930 Oceanic structures
   0932 Radioactivity methods
   0933 Remote sensing
   0935 Seismic methods (3025, 7294)
   0994 Instruments and techniques
   0999 General or miscellaneous

1000 GEOCHEMISTRY

   1009 Geochemical modeling (3610, 8410)
   1011 Thermodynamics (0766, 3611, 8411)
   1012 Reactions and phase equilibria (3612, 8412)
   1031 Subduction zone processes (3060, 3613, 8170, 8413)
   1032 Mid-oceanic ridge processes (3614, 8416)
   1033 Intra-plate processes (3615, 8415)
   1034 Hydrothermal systems (0450, 3017, 3616, 4832, 8135, 8424)
   1039 Alteration and weathering processes (3617)
   1036 Magma chamber processes (3618)
   1037 Magma genesis and partial melting (3619)
   1038 Mantle processes (3621)
   1015 Composition of the core
   1020 Composition of the continental crust
   1021 Composition of the oceanic crust
   1022 Composition of the hydrosphere
   1023 Composition of the biosphere
   1025 Composition of the mantle
   1026 Composition of the moon
   1027 Composition of the planets
   1028 Composition of meteorites (3662, 6240)
   1029 Composition of aerosols and dust particles
   1030 Geochemical cycles (0330)
   1065 Major and trace element geochemistry
   1040 Radiogenic isotope geochemistry
   1041 Stable isotope geochemistry (0454, 4870)
   1042 Mineral and crystal chemistry (3620)
   1043 Fluid and melt inclusion geochemistry
   1050 Marine geochemistry (4835, 4845, 4850)
   1051 Sedimentary geochemistry
   1055 Organic and biogenic geochemistry
   1060 Planetary geochemistry (5405, 5410, 5704, 5709, 6005, 6008)
   1090 Field relationships (3690, 8486)
   1094 Instruments and techniques
   1099 General or miscellaneous

1100 GEOCHRONOLOGY

   1105 Quaternary geochronology
   1110 Sidereal geochronology
   1115 Radioisotope geochronology
   1120 Isotopic disequilibrium dating
   1125 Chemical and biological geochronology
   1130 Geomorphological geochronology
   1135 Correlative geochronology
   1140 Thermochronology
   1145 Tephrochronology (8455)
   1150 Cosmogenic-nuclide exposure dating (4918)
   1155 Extinct radionuclide geochronology
   1160 Planetary and lunar geochronology
   1165 Sedimentary geochronology
   1194 Instruments and techniques
   1199 General or miscellaneous

1200 GEODESY AND GRAVITY

   1244 Standards and absolute measurements
   1294 Instruments and techniques
   1295 Integrations of techniques
   1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
   1241 Satellite geodesy: technical issues (6994, 7969)
   1243 Space geodetic surveys(4337)
   1204 Control surveys
   1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
   1207 Transient deformation (6924, 7230, 7240)
   1209 Tectonic deformation (6924)
   1211 Non-tectonic deformation
   1212 Earth’s interior: composition and state (7207, 7208, 8105, 8124)
   1213 Earth’s interior: dynamics (1507, 7207, 7208, 8115, 8120)
   1236 Rheology of the lithosphere and mantle (7218, 8160)
   1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
   1214 Geopotential theory and determination (0903)
   1217 Time variable gravity (7223, 7230)
   1229 Reference systems
   1239 Earth rotation variations
   1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
   1218 Mass balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532)
   1220 Atmosphere monitoring with geodetic techniques (6952)
   1222 Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)
   1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
   1221 Lunar and planetary geodesy and gravity (5417, 5450, 5714, 5744, 6019, 6250)
   1299 General or miscellaneous (1709)

1500 GEOMAGNETISM AND PALEOMAGNETISM

   1503 Archeomagnetism
   1505 Biogenic magnetic minerals
   1507 Core processes (1213, 8115)
   1510 Dynamo: theories and simulations
   1512 Environmental magnetism
   1513 Geomagnetic excursions
   1515 Geomagnetic induction
   1517 Magnetic anomalies: modeling and interpretation
   1518 Magnetic fabrics and anisotropy
   1519 Magnetic mineralogy and petrology
   1520 Magnetostratigraphy
   1521 Paleointensity
   1522 Paleomagnetic secular variation
   1525 Paleomagnetism applied to tectonics: regional, global
   1527 Paleomagnetism applied to geologic processes
   1530 Rapid time variations
   1532 Reference fields: regional, global
   1533 Remagnetization
   1535 Reversals: process, timescale, magnetostratigraphy
   1540 Rock and mineral magnetism
   1541 Satellite magnetics: main field, crustal field, external field
   1545 Spatial variations: all harmonics and anomalies
   1550 Spatial variations attributed to seafloor spreading (3005)
   1555 Time variations: diurnal to decadal
   1560 Time variations: secular and longer
   1594 Instruments and techniques
   1595 Planetary magnetism: all frequencies and wavelengths
   1599 General or miscellaneous

1600 GLOBAL CHANGE

   1605 Abrupt/rapid climate change (4901, 8408)
   1610 Atmosphere (0315, 0325)
   1615 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912)
   1616 Climate variability (1635, 3305, 3309, 4215, 4513)
   1620 Climate dynamics (0429, 3309)
   1621 Cryospheric change (0776)
   1622 Earth system modeling (1225, 4316)
   1625 Geomorphology and weathering (0790, 1824, 1825, 1826, 1886)
   1626 Global climate models (3337, 4928)
   1627 Coupled models of the climate system
   1630 Impacts of global change (1225, 4321)
   1631 Land/atmosphere interactions (1218, 1843, 3322)
   1632 Land cover change
   1635 Oceans (1616, 3305, 4215, 4513)
   1637 Regional climate change (4321)
   1640 Remote sensing (1855, 4337)
   1641 Sea level change (1222, 1225, 4304, 4556)
   1645 Solid Earth (1225)
   1650 Solar variability (7537)
   1655 Water cycles (1836)
   1694 Instruments and techniques
   1699 General or miscellaneous

1700 HISTORY OF GEOPHYSICS

   1704 Atmospheric sciences
   1705 Biogeosciences
   1706 Computational geophysics
   1707 Cryosphere
   1708 Geochronology
   1709 Geodesy (1299)
   1714 Geomagnetism and paleomagnetism
   1719 Hydrology
   1721 Nonlinear geophysics
   1724 Ocean sciences
   1729 Planetology
   1734 Seismology
   1739 Solar/planetary relationships
   1744 Tectonophysics
   1749 Volcanology, geochemistry, and petrology
   1794 Instruments and techniques
   1799 General or miscellaneous

1800 HYDROLOGY

   1803 Anthropogenic effects (4802, 4902)
   1804 Catchment
   1806 Chemistry of fresh water
   1807 Climate impacts (4321)
   1805 Computational hydrology
   1808 Dams
   1810 Debris flow and landslides (4303)
   1809 Desertification
   1812 Drought (4303)
   1813 Eco-hydrology
   1814 Energy budgets
   1815 Erosion
   1816 Estimation and forecasting (4315)
   1818 Evapotranspiration
   1817 Extreme events (4313)
   1821 Floods (4303)
   1820 Floodplain dynamics
   1823 Frozen ground
   1819 Geographic Information Systems (GIS)
   1822 Geomechanics
   1824 Geomorphology: general (1625)
   1825 Geomorphology: fluvial (1625)
   1826 Geomorphology: hillslope (1625)
   1827 Glaciology (0736, 0776, 1863)
   1828 Groundwater hydraulics
   1829 Groundwater hydrology
   1831 Groundwater quality
   1830 Groundwater/surface water interaction
   1832 Groundwater transport
   1834 Human impacts (4323)
   1833 Hydroclimatology
   1835 Hydrogeophysics
   1836 Hydrological cycles and budgets (1218, 1655)
   1840 Hydrometeorology
   1839 Hydrologic scaling
   1838 Infiltration
   1842 Irrigation
   1843 Land/atmosphere interactions (1218, 1631, 3322)
   1845 Limnology (0458, 4239, 4942)
   1846 Model calibration (3333)
   1847 Modeling (1952, 4316)
   1848 Monitoring networks
   1849 Numerical approximations and analysis (3336)
   1850 Overland flow
   1851 Plant ecology (0476)
   1852 Plant uptake
   1854 Precipitation (3354)
   1853 Precipitation-radar
   1855 Remote sensing (1640, 4337)
   1857 Reservoirs (surface)
   1856 River channels (0483, 0744)
   1858 Rocks: chemical properties
   1859 Rocks: physical properties
   1860 Streamflow
   1861 Sedimentation (4863)
   1862 Sediment transport (4558)
   1863 Snow and ice (0736, 0738, 0776, 1827)
   1865 Soils (0486)
   1866 Soil moisture
   1869 Stochastic hydrology
   1871 Surface water quality
   1872 Time series analysis (1988, 3270, 4277, 4475)
   1873 Uncertainty assessment (1990, 3275)
   1874 Ungaged basins
   1875 Vadose zone
   1876 Water budgets
   1878 Water/energy interactions (0495)
   1879 Watershed
   1880 Water management (6334)
   1884 Water supply
   1886 Weathering (0790, 1625)
   1890 Wetlands (0497)
   1894 Instruments and techniques: modeling
   1895 Instruments and techniques: monitoring
   1899 General or miscellaneous

1900 INFORMATICS

   1902 Community modeling frameworks
   1904 Community standards
   1906 Computational models, algorithms
   1908 Cyberinfrastructure
   1910 Data assimilation, integration and fusion
   1912 Data management, preservation, rescue
   1914 Data mining
   1916 Data and information discovery
   1918 Decision analysis (4324, 6309)
   1920 Emerging informatics technologies
   1922 Forecasting (2722, 4315, 7924)
   1924 Formal logics and grammars
   1926 Geospatial
   1928 GIS science
   1930 Data and information governance
   1932 High-performance computing
   1934 International collaboration
   1936 Interoperability
   1938 Knowledge representation and knowledge bases
   1940 Machine-to-machine communication
   1942 Machine learning (0555)
   1944 Markup languages
   1946 Metadata
   1948 Metadata: Provenance
   1950 Metadata: Quality
   1952 Modeling (0466, 0545, 0798, 1847, 4255, 4316)
   1954 Natural language processing
   1956 Numerical algorithms
   1958 Ontologies
   1960 Portals and user interfaces
   1962 Query languages for science, markup languages, ontologies
   1964 Real-time and responsive information delivery (4346)
   1966 Rules and logic
   1968 Scientific reasoning/inference
   1970 Semantic web and semantic integration
   1972 Sensor web
   1974 Social networks
   1976 Software tools and services
   1978 Software re-use
   1980 Spatial analysis and representation (0500, 3252)
   1982 Standards
   1984 Statistical methods: Descriptive (4318)
   1986 Statistical methods: Inferential (4318)
   1988 Temporal analysis and representation (1872, 3270, 4277, 4475)
   1990 Uncertainty (1873, 3275)
   1992 Virtual globes
   1994 Visualization and portrayal (0530)
   1996 Web Services
   1998 Workflow
   1999 General or miscellaneous

2100 INTERPLANETARY PHYSICS

   2101 Coronal mass ejections (4305, 7513)
   2102 Corotating streams
   2104 Cosmic rays
   2109 Discontinuities (7811)
   2111 Ejecta, driver gases, and magnetic clouds
   2114 Energetic particles (7514)
   2124 Heliopause and solar wind termination
   2126 Heliosphere/interstellar medium interactions
   2129 Interplanetary dust
   2134 Interplanetary magnetic fields
   2139 Interplanetary shocks
   2144 Interstellar gas
   2149 MHD waves and turbulence (2752, 6050, 7836)
   2151 Neutral particles (7837)
   2152 Pickup ions
   2154 Planetary bow shocks
   2159 Plasma waves and turbulence
   2162 Solar cycle variations (7536)
   2164 Solar wind plasma
   2169 Solar wind sources
   2194 Instruments and techniques
   2199 General or miscellaneous

2400 IONOSPHERE (6929)

   2403 Active experiments
   2407 Auroral ionosphere (2704)
   2409 Current systems (2721)
   2411 Electric fields (2712)
   2415 Equatorial ionosphere
   2419 Ion chemistry and composition (0335)
   2423 Ionization processes (7823)
   2427 Ionosphere/atmosphere interactions (0335)
   2431 Ionosphere/magnetosphere interactions (2736)
   2435 Ionospheric disturbances
   2437 Ionospheric dynamics
   2439 Ionospheric irregularities
   2441 Ionospheric storms (7949)
   2442 Meteor-trail physics
   2443 Midlatitude ionosphere
   2447 Modeling and forecasting
   2451 Particle acceleration
   2455 Particle precipitation
   2459 Planetary ionospheres (5435, 5729, 6026)
   2461 Plasma interactions with dust and aerosols (7849)
   2463 Plasma convection (2760)
   2467 Plasma temperature and density
   2471 Plasma waves and instabilities (2772)
   2475 Polar cap ionosphere
   2479 Solar radiation and cosmic ray effects
   2481 Topside ionosphere
   2483 Wave/particle interactions (7867)
   2487 Wave propagation (0689, 3285, 4275, 4455, 6934)
   2494 Instruments and techniques
   2499 General or miscellaneous

2700 MAGNETOSPHERIC PHYSICS (6939)

   2704 Auroral phenomena (2407)
   2706 Cusp
   2712 Electric fields (2411)
   2716 Energetic particles: precipitating
   2720 Energetic particles: trapped
   2721 Field-aligned currents and current systems (2409)
   2722 Forecasting (1922, 4315, 7924, 7964)
   2723 Magnetic reconnection (7526, 7835)
   2724 Magnetopause and boundary layers
   2728 Magnetosheath
   2730 Magnetosphere: inner
   2731 Magnetosphere: outer
   2732 Magnetosphere interactions with satellites and rings
   2736 Magnetosphere/ionosphere interactions (2431)
   2740 Magnetospheric configuration and dynamics
   2744 Magnetotail
   2748 Magnetotail boundary layers
   2752 MHD waves and instabilities (2149, 6050, 7836)
   2753 Numerical modeling
   2756 Planetary magnetospheres (5443, 5737, 6033)
   2760 Plasma convection (2463)
   2764 Plasma sheet
   2768 Plasmasphere
   2772 Plasma waves and instabilities (2471)
   2776 Polar cap phenomena
   2774 Radiation belts
   2778 Ring current
   2780 Solar wind interactions with unmagnetized bodies
   2784 Solar wind/magnetosphere interactions
   2788 Magnetic storms and substorms (4305, 7954)
   2790 Substorms
   2794 Instruments and techniques
   2799 General or miscellaneous

3000 MARINE GEOLOGY AND GEOPHYSICS

   3001 Back-arc basin processes
   3002 Continental shelf and slope processes (4219)
   3004 Gas and hydrate systems
   3005 Marine magnetics and paleomagnetics (1550)
   3006 Marine electromagnetics
   3010 Gravity and isostasy (1218, 1222)
   3015 Heat flow (benthic)
   3017 Hydrothermal systems (0450, 1034, 3616, 4832, 8135, 8424)
   3020 Littoral processes
   3021 Marine hydrogeology
   3022 Marine sediments: processes and transport
   3025 Marine seismics (0935, 7294)
   3030 Micropaleontology (0459, 4944)
   3035 Midocean ridge processes
   3036 Ocean drilling
   3037 Oceanic hotspots and intraplate volcanism
   3038 Oceanic plateaus and microcontinents
   3039 Oceanic transform and fracture zone processes
   3040 Plate tectonics (8150, 8155, 8157, 8158)
   3042 Ophiolites (8140)
   3045 Seafloor morphology, geology, and geophysics
   3050 Ocean observatories and experiments
   3060 Subduction zone processes (1031, 3613, 8170, 8413)
   3070 Submarine landslides
   3075 Submarine tectonics and volcanism
   3080 Submergence instruments: ROV, AUV, submersibles
   3094 Instruments and techniques
   3099 General or miscellaneous

3200 MATHEMATICAL GEOPHYSICS (0500, 4307, 4314, 4400, 7833)

   3205 Fourier analysis (3255)
   3215 Instability analysis (4312)
   3260 Inverse theory
   3225 Numerical approximations and analysis (4260)
   3235 Persistence, memory, correlations, clustering (3265, 4313, 7857)
   3238 Prediction (3245, 4263, 4315)
   3245 Probabilistic forecasting (3238, 4315)
   3252 Spatial analysis (0500, 1980, 4319)
   3255 Spectral analysis (3205, 3280, 4319)
   3265 Stochastic processes (3235, 4468, 4475, 7857)
   3270 Time series analysis (1872, 1988, 4277, 4475)
   3275 Uncertainty quantification (1873, 1990)
   3280 Wavelet transform (3255, 4455)
   3285 Wave propagation (0689, 2487, 4275, 4455, 6934)
   3294 Instruments and techniques
   3299 General or miscellaneous

3300 ATMOSPHERIC PROCESSES

   3304 Atmospheric electricity
   3303 Balanced dynamical models
   3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
   3307 Boundary layer processes
   3309 Climatology (1616, 1620, 3305, 4215, 8408)
   3311 Clouds and aerosols
   3310 Clouds and cloud feedbacks
   3314 Convective processes
   3315 Data assimilation
   3319 General circulation (1223)
   3320 Idealized model
   3322 Land/atmosphere interactions (1218, 1631, 1843, 4301)
   3323 Large eddy simulation
   3324 Lightning
   3325 Monte Carlo technique
   3329 Mesoscale meteorology
   3332 Mesospheric dynamics
   3333 Model calibration (1846)
   3334 Middle atmosphere dynamics (0341, 0342)
   3335 North American Monsoon
   3336 Numerical approximations and analyses (1849)
   3337 Global climate models (1626, 4928)
   3339 Ocean/atmosphere interactions (0312, 4301, 4504)
   3344 Paleoclimatology (0473, 4900)
   3346 Planetary meteorology (5445, 5739)
   3349 Polar meteorology
   3354 Precipitation (1854)
   3359 Radiative processes
   3355 Regional modeling (4316)
   3360 Remote sensing (4337)
   3362 Stratosphere/troposphere interactions
   3363 Stratospheric dynamics
   3364 Synoptic-scale meteorology
   3365 Subgrid-scale (SGS) parameterization
   3367 Theoretical modeling (4316)
   3369 Thermospheric dynamics (0358)
   3371 Tropical convection
   3372 Tropical cyclones
   3373 Tropical dynamics
   3374 Tropical meteorology
   3375 Tropopause dynamics
   3379 Turbulence (4490)
   3384 Acoustic-gravity waves
   3389 Tides and planetary waves
   3390 Wildland fire model
   3394 Instruments and techniques
   3399 General or miscellaneous

3600 MINERALOGY AND PETROLOGY

   3610 Geochemical modeling (1009, 8410)
   3611 Thermodynamics (0766, 1011, 8411)
   3612 Reactions and phase equilibria (1012, 8412)
   3613 Subduction zone processes (1031, 3060, 8170, 8413)
   3614 Mid-oceanic ridge processes (1032, 8416)
   3615 Intra-plate processes (1033, 8415)
   3616 Hydrothermal systems (0450, 1034, 3017, 4832, 8135, 8424)
   3617 Alteration and weathering processes (1039)
   3618 Magma chamber processes (1036)
   3619 Magma genesis and partial melting (1037)
   3621 Mantle processes (1038)
   3620 Mineral and crystal chemistry (1042)
   3625 Petrography, microstructures, and textures
   3630 Experimental mineralogy and petrology
   3640 Igneous petrology
   3641 Extrusive structures and rocks
   3642 Intrusive structures and rocks
   3643 Layered magma chambers
   3660 Metamorphic petrology
   3651 Thermobarometry
   3652 Pressure-temperature-time paths
   3653 Fluid flow
   3654 Ultra-high pressure metamorphism
   3656 Ultra-high temperature metamorphism
   3662 Meteorite mineralogy and petrology (1028, 6240)
   3665 Mineral occurrences and deposits
   3672 Planetary mineralogy and petrology (5410)
   3675 Sedimentary petrology
   3690 Field relationships (1090, 8486)
   3694 Instruments and techniques
   3699 General or miscellaneous

3900 MINERAL PHYSICS

   3902 Creep and deformation
   3904 Defects
   3909 Elasticity and anelasticity
   3914 Electrical properties
   3919 Equations of state
   3924 High-pressure behavior
   3929 NMR, Mossbauer spectroscopy, and other magnetic techniques
   3934 Optical, infrared, and Raman spectroscopy
   3939 Physical thermodynamics
   3944 Shock wave experiments
   3947 Surfaces and interfaces
   3949 Thermal expansivity
   3954 X-ray, neutron, and electron spectroscopy and diffraction
   3994 Instruments and techniques
   3999 General or miscellaneous

4300 NATURAL HAZARDS

   4301 Atmospheric (0370   3322, 3339)
   4302 Geological (0742, 4564, 7212, 7280, 8419, 8425, 8426, 8428, 8488)
   4303 Hydrological (1810, 1812, 1821)
   4304 Oceanic (1641, 4564)
   4305 Space weather (2101, 2788, 7900)
   4306 Multihazards
   4307 Methods (0500, 3200, 4400)
   4308 Other (0468, 0702, 6205, 6210)
   4311 Analogue modeling
   4312 Catastrophe and catastrophe theory (3215)
   4313 Extreme events (1817, 3235)
   4314 Mathematical and computer modeling (0500, 3200)
   4315 Monitoring, forecasting, prediction (1816, 1922, 2722, 3238, 3245, 4263, 7223, 7924)
   4316 Physical modeling (0466, 0545, 0798, 1622, 1847, 1952, 3355, 3367)
   4317 Precursors
   4318 Statistical analysis (1984, 1986)
   4319 Spatial modeling (3252, 3255)
   4321 Climate impact (1630, 1637, 1807, 8408)
   4322 Health impact
   4323 Human impact (1834, 7938)
   4324 Spatial decision support systems (1918, 6309)
   4325 Megacities and urban environment (0345, 0478, 0493)
   4326 Exposure
   4327 Resilience
   4328 Risk (8488)
   4329 Sustainable development
   4330 Vulnerability
   4331 Disaster relief
   4332 Disaster resilience
   4333 Disaster risk analysis and assessment (6304, 8488)
   4334 Disaster risk communication
   4335 Disaster management
   4336 Economic impacts of disasters
   4337 Remote sensing and disasters (1243, 1640, 1855, 3360, 8485)
   4338 Disaster policy (6300, 6620)
   4339 Disaster mitigation (6309, 7914)
   4341 Early warning systems
   4342 Emergency management (6344)
   4343 Preparedness and planning (6334)
   4344 Microzonation and macrozonation
   4345 Community management
   4346 Emergency response and evacuations (1964)
   4347 Recovery and reconstruction after disaster
   4348 Contingency planning
   4351 International organizations and natural disasters
   4352 Interaction between science and disaster management authorities
   4353 Sociology of disasters (1974)
   4354 Psychology of disasters
   4355 Miscellaneous

4400 NONLINEAR GEOPHYSICS (3200, 4307, 6944, 7839)

   4410 Bifurcations and attractors
   4415 Cascades
   4420 Chaos (7805)
   4425 Critical phenomena
   4430 Complex systems
   4435 Emergent phenomena
   4440 Fractals and multifractals
   4445 Nonlinear differential equations
   4450 Nonlinear maps
   4455 Nonlinear waves, shock waves, solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, 7852)
   4460 Pattern formation
   4465 Phase transitions
   4468 Probability distributions, heavy and fat-tailed (3265)
   4470 Renormalization group methods
   4475 Scaling: spatial and temporal (1872, 1988, 3265, 3270, 4277, 7857)
   4480 Self-organized criticality
   4485 Self-organization
   4490 Turbulence (3379, 4568, 7863)
   4494 Instruments and techniques
   4499 General or miscellaneous

4200 OCEANOGRAPHY: GENERAL

   4203 Analytical modeling and laboratory experiments
   4207 Arctic and Antarctic oceanography (9310, 9315)
   4211 Benthic boundary layers
   4215 Climate and interannual variability (1616, 1635, 3305, 3309, 4513)
   4217 Coastal processes
   4219 Continental shelf and slope processes (3002)
   4220 Coral reef systems (4916)
   4223 Descriptive and regional oceanography
   4227 Diurnal, seasonal, and annual cycles (0438)
   4231 Equatorial oceanography
   4235 Estuarine processes (0442)
   4239 Limnology (0458, 1845, 4942)
   4243 Marginal and semi-enclosed seas
   4247 Marine meteorology
   4251 Marine pollution (0345, 0478)
   4255 Numerical modeling (0545, 0560, 1952)
   4259 Ocean acoustics
   4260 Ocean data assimilation and reanalysis (3225)
   4262 Ocean observing systems
   4263 Ocean predictability and prediction (3238, 4315)
   4264 Ocean optics (0649)
   4271 Physical and chemical properties of seawater
   4273 Physical and biogeochemical interactions
   4275 Remote sensing and electromagnetic processes (0689, 2487, 3285, 4455, 6934)
   4277 Time series experiments (1872, 1988, 3270, 4475)
   4279 Upwelling and convergences (4964)
   4283 Water masses
   4294 Instruments and techniques
   4299 General or miscellaneous

4500 OCEANOGRAPHY: PHYSICAL

   4504 Air/sea interactions (0312, 3339)
   4506 Capillary waves
   4508 Coriolis effects
   4512 Currents
   4513 Decadal ocean variability (1616, 1635, 3305, 4215)
   4515 Deep recirculations
   4516 Eastern boundary currents
   4520 Eddies and mesoscale processes
   4522 ENSO (4922)
   4524 Fine structure and microstructure
   4528 Fronts and jets
   4532 General circulation (1218, 1222)
   4534 Hydrodynamic modeling
   4536 Hydrography and tracers
   4540 Ice mechanics and air/sea/ice exchange processes (0700, 0750, 0752, 0754)
   4544 Internal and inertial waves
   4546 Nearshore processes
   4548 Ocean fog
   4550 Ocean influence of Earth rotation (1223)
   4553 Overflows
   4554 Planetary waves
   4556 Sea level: variations and mean (1222, 1225, 1641)
   4558 Sediment transport (1862)
   4560 Surface waves and tides (1222)
   4562 Topographic/bathymetric interactions
   4564 Tsunamis and storm surges (4302, 4304)
   4568 Turbulence, diffusion, and mixing processes (4490)
   4572 Upper ocean and mixed layer processes
   4576 Western boundary currents
   4594 Instruments and techniques
   4599 General or miscellaneous

4800 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL (0460)

   4801 Aerosols (0305, 4906)
   4803 Analytical chemistry
   4802 Anoxic environments (0404, 1803, 4834, 4902)
   4804 Benthic processes, benthos (0408)
   4805 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912)
   4806 Carbon cycling (0428)
   4807 Chemical speciation and complexation
   4808 Chemical tracers
   4811 Chemosynthesis
   4809 Colloids
   4813 Ecological prediction
   4815 Ecosystems, structure, dynamics, and modeling (0439)
   4817 Food webs, structure, and dynamics (0491)
   4820 Gases
   4825 Geochemistry
   4830 Higher trophic levels
   4832 Hydrothermal systems (0450, 1034, 3017, 3616, 8135, 8424)
   4834 Hypoxic environments (0404, 4802)
   4835 Marine inorganic chemistry (1050)
   4840 Microbiology and microbial ecology (0465)
   4843 Natural products chemistry
   4845 Nutrients and nutrient cycling (0470, 1050)
   4850 Marine organic chemistry (0470, 1050)
   4851 Oxidation/reduction reactions (0471)
   4852 Photochemistry
   4853 Photosynthesis
   4854 Physical chemistry
   4855 Phytoplankton
   4858 Population dynamics and ecology
   4860 Radioactivity and radioisotopes
   4863 Sedimentation (1861)
   4866 Sorptive scavenging
   4870 Stable isotopes (0454, 1041)
   4872 Symbiosis
   4875 Trace elements (0489)
   4890 Zooplankton
   4894 Instruments, sensors, and techniques
   4899 General or miscellaneous

4900 PALEOCEANOGRAPHY (0473, 3344)

   4901 Abrupt/rapid climate change (1605)
   4902 Anthropogenic effects (1803, 4802)
   4904 Atmospheric transport and circulation
   4906 Aerosols (0305, 4801)
   4908 Albedo
   4910 Astronomical forcing
   4912 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4805)
   4914 Continental climate records
   4916 Corals (4220)
   4918 Cosmogenic isotopes (1150)
   4920 Dendrochronology
   4922 El Nino (4522)
   4924 Geochemical tracers
   4926 Glacial
   4928 Global climate models (1626, 3337)
   4930 Greenhouse gases
   4932 Ice cores (0724)
   4934 Insolation forcing
   4936 Interglacial
   4938 Interhemispheric phasing
   4940 Isotopic stage
   4942 Limnology (0458, 1845, 4239)
   4944 Micropaleontology (0459, 3030)
   4946 Milankovitch theory
   4948 Paleocene/Eocene thermal maximum
   4950 Paleoecology
   4952 Palynology
   4954 Sea surface temperature
   4958 Speleothems
   4960 Stadial
   4962 Thermohaline
   4964 Upwelling (4279)
   4994 Instruments and techniques
   4999 General or miscellaneous
[\expand]
5100 PHYSICAL PROPERTIES OF ROCKS
   5102 Acoustic properties
   5104 Fracture and flow
   5109 Magnetic and electrical properties (0925)
   5112 Microstructure
   5114 Permeability and porosity
   5120 Plasticity, diffusion, and creep
   5134 Thermal properties
   5139 Transport properties
   5144 Wave attenuation
   5194 Instruments and techniques
   5199 General or miscellaneous

5200 PLANETARY SCIENCES: ASTROBIOLOGY

   5205 Formation of stars and planets
   5210 Planetary atmospheres, clouds, and hazes (0343)
   5215 Origin of life
   5220 Hydrothermal systems and weathering on other planets
   5225 Early environment of Earth

5400 PLANETARY SCIENCES: SOLID SURFACE PLANETS

   5405 Atmospheres (0343, 1060)
   5408 Aurorae and airglow
   5410 Composition (1060, 3672)
   5415 Erosion and weathering
   5416 Glaciation
   5417 Gravitational fields (1221)
   5418 Heat flow
   5419 Hydrology and fluvial processes
   5422 Ices
   5420 Impact phenomena, cratering (6022, 8136)
   5421 Interactions with particles and fields
   5430 Interiors (8147)
   5435 Ionospheres (2459)
   5440 Magnetic fields and magnetism
   5443 Magnetospheres (2756)
   5445 Meteorology (3346)
   5450 Orbital and rotational dynamics (1221)
   5455 Origin and evolution
   5460 Physical properties of materials
   5462 Polar regions
   5464 Remote sensing
   5465 Rings and dust
   5470 Surface materials and properties
   5475 Tectonics (8149)
   5480 Volcanism (6063, 8148, 8450)
   5494 Instruments and techniques
   5499 General or miscellaneous
[/expand/\]
5700 PLANETARY SCIENCES: FLUID PLANETS
   5704 Atmospheres (0343, 1060)
   5706 Aurorae
   5709 Composition (1060)
   5714 Gravitational fields (1221)
   5719 Interactions with particles and fields
   5724 Interiors (8147)
   5729 Ionospheres (2459)
   5734 Magnetic fields and magnetism
   5737 Magnetospheres (2756)
   5739 Meteorology (3346)
   5744 Orbital and rotational dynamics (1221)
   5749 Origin and evolution
   5754 Polar regions
   5759 Rings and dust
   5770 Tidal forces
   5780 Tori and exospheres
   5794 Instruments and techniques
   5799 General or miscellaneous

6000 PLANETARY SCIENCES: COMETS AND SMALL BODIES

   6005 Atmospheres (1060)
   6009 Aurorae, airglow, and X-ray emission
   6008 Composition (1060)
   6015 Dust
   6017 Erosion and weathering
   6019 Gravitational fields (1221)
   6020 Ices
   6022 Impact phenomena (5420, 8136)
   6025 Interactions with solar wind plasma and fields
   6023 Comets: dust tails and trails (6210)
   6024 Interiors (8147)
   6026 Ionospheres (2459)
   6030 Magnetic fields and magnetism
   6033 Magnetospheres (2756)
   6035 Orbital and rotational dynamics
   6040 Origin and evolution
   6045 Physics and chemistry of materials
   6050 Plasma and MHD instabilities (2149, 2752, 7836)
   6055 Surfaces
   6060 Radiation and chemistry
   6063 Volcanism (5480, 8450)
   6094 Instruments and techniques
   6099 General or miscellaneous

6200 PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS

   6205 Asteroids (4308)
   6206 Asteroids: satellites
   6207 Comparative planetology
   6210 Comets (4308, 6023)
   6211 Centaurs
   6213 Dust
   6218 Jovian satellites
   6219 Io
   6221 Europa
   6222 Ganymede
   6223 Callisto
   6220 Jupiter
   6224 Kuiper belt objects
   6225 Mars
   6230 Martian satellites
   6235 Mercury
   6240 Meteorites and tektites (1028, 3662)
   6245 Meteors
   6250 Moon (1221)
   6255 Neptune
   6260 Neptunian satellites
   6261 Triton
   6265 Planetary rings
   6270 Pluto and satellites
   6275 Saturn
   6280 Saturnian satellites
   6281 Titan
   6282 Enceladus
   6285 Trans-Neptunian objects
   6290 Uranian satellites
   6293 Uranus
   6295 Venus
   6296 Extra-solar planets
   6297 Instruments and techniques
   6299 General or miscellaneous

6300 POLICY SCIENCES (4338, 7964)

   6304 Benefit-cost analysis (4333)
   6309 Decision making under uncertainty (1918, 4324, 4339)
   6314 Demand estimation
   6319 Institutions
   6324 Legislation and regulations (6615)
   6329 Project evaluation
   6334 Regional planning (1880, 4343)
   6339 System design
   6344 System operation and management (4342)
   6349 General or miscellaneous

6600 PUBLIC ISSUES

   6610 Funding
   6615 Legislation and regulations (6324)
   6620 Science policy (0485, 4338)
   6630 Workforce
   6699 General or miscellaneous

6900 RADIO SCIENCE

   6914 Electromagnetic noise and interference
   6924 Interferometry (1207, 1209, 1242)
   6929 Ionospheric physics (1240, 2400)
   6934 Ionospheric propagation (0689, 2487, 3285, 4275, 4455)
   6939 Magnetospheric physics (2700)
   6944 Nonlinear phenomena (4400, 7839)
   6949 Radar astronomy
   6952 Radar atmospheric physics (1220)
   6954 Radio astronomy
   6959 Radio oceanography (1222)
   6964 Radio wave propagation
   6969 Remote sensing
   6974 Signal processing (0674)
   6979 Space and satellite communication
   6982 Tomography and imaging (7270, 8180)
   6984 Waves in plasma (7867)
   6994 Instruments and techniques (1241)
   6999 General or miscellaneous

7200 SEISMOLOGY

   7203 Body waves
   7205 Continental crust (1219)
   7207 Core (1212, 1213, 8124)
   7208 Mantle (1212, 1213, 8124)
   7209 Earthquake dynamics (1242)
   7212 Earthquake ground motions and engineering seismology (4302)
   7215 Earthquake source observations (1240)
   7218 Lithosphere (1236)
   7219 Seismic monitoring and test-ban treaty verification
   7220 Oceanic crust
   7221 Paleoseismology (8036)
   7223 Earthquake interaction, forecasting, and prediction (1217, 1242, 4315)
   7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
   7240 Subduction zones (1207, 1219, 1240)
   7245 Mid-ocean ridges
   7250 Transform faults
   7255 Surface waves and free oscillations
   7260 Theory
   7270 Tomography (6982, 8180)
   7280 Volcano seismology (4302, 8419)
   7290 Computational seismology
   7294 Seismic instruments and networks (0935, 3025)
   7299 General or miscellaneous

7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY

   7504 Celestial mechanics
   7507 Chromosphere
   7509 Corona
   7511 Coronal holes
   7513 Coronal mass ejections (2101)
   7514 Energetic particles (2114)
   7519 Flares
   7522 Helioseismology
   7524 Magnetic fields
   7526 Magnetic reconnection (2723, 7835)
   7529 Photosphere
   7531 Prominence eruptions
   7534 Radio emissions
   7536 Solar activity cycle (2162)
   7537 Solar and stellar variability (1650)
   7538 Solar irradiance
   7539 Stellar astronomy
   7544 Stellar interiors and dynamo theory
   7546 Transition region
   7549 Ultraviolet emissions
   7554 X-rays, gamma rays, and neutrinos
   7594 Instruments and techniques
   7599 General or miscellaneous

7800 SPACE PLASMA PHYSICS

   7803 Active perturbation experiments
   7805 Chaos (4420)
   7807 Charged particle motion and acceleration
   7811 Discontinuities (2109)
   7815 Electrostatic structures
   7823 Ionization processes (2423)
   7827 Kinetic and MHD theory
   7829 Kinetic waves and instabilities
   7831 Laboratory studies and experimental techniques
   7835 Magnetic reconnection (2723, 7526)
   7833 Mathematical and numerical techniques (0500, 3200)
   7836 MHD waves and instabilities (2149, 2752, 6050)
   7837 Neutral particles (2151)
   7839 Nonlinear phenomena (4400, 6944)
   7844 Parametric processes
   7845 Particle acceleration
   7846 Plasma energization
   7849 Plasma interactions with dust and aerosols (2461)
   7847 Radiation processes
   7851 Shock waves (4455)
   7852 Solitons and solitary waves (4455)
   7853 Spacecraft/atmosphere interactions
   7855 Spacecraft sheaths, wakes, charging
   7857 Stochastic phenomena (3235, 3265, 4475)
   7859 Transport processes
   7863 Turbulence (4490)
   7867 Wave/particle interactions (2483, 6984)
   7868 Wave/wave interactions
   7894 Instruments and techniques
   7899 General or miscellaneous

7900 SPACE WEATHER (4305)

   7904 Geomagnetically induced currents
   7914 Engineering for hazard mitigation (4339)
   7924 Forecasting (1922, 2722, 4315)
   7934 Impacts on technological systems
   7938 Impacts on humans (4323)
   7944 Ionospheric effects on radio waves
   7949 Ionospheric storms (2441)
   7954 Magnetic storms (2788)
   7959 Models
   7964 Policy (2722, 6300)
   7969 Satellite drag (1241)
   7974 Solar effects
   7984 Space radiation environment
   7999 General or miscellaneous

8000 STRUCTURAL GEOLOGY

   8002 Continental neotectonics (8107)
   8003 Diapir and diapirism
   8004 Dynamics and mechanics of faulting (8118)
   8005 Folds and folding
   8010 Fractures and faults
   8011 Kinematics of crustal and mantle deformation
   8012 High strain deformation zones
   8015 Local crustal structure
   8020 Mechanics, theory, and modeling
   8021 Melanges
   8025 Mesoscopic fabrics
   8030 Microstructures
   8031 Rheology: crust and lithosphere (8159)
   8032 Rheology: general (8160)
   8033 Rheology: mantle (8162)
   8034 Rheology and friction of fault zones (8163)
   8035 Pluton emplacement
   8036 Paleoseismology (7221)
   8038 Regional crustal structure
   8040 Remote sensing
   8045 Role of fluids
   8094 Instruments and techniques
   8099 General or miscellaneous

8100 TECTONOPHYSICS

   8102 Continental contractional orogenic belts and inversion tectonics
   8103 Continental cratons
   8104 Continental margins: convergent
   8105 Continental margins: divergent (1212, 8124)
   8106 Continental margins: transform
   8107 Continental neotectonics (8002)
   8108 Continental tectonics: compressional
   8109 Continental tectonics: extensional (0905)
   8110 Continental tectonics: general (0905)
   8111 Continental tectonics: strike-slip and transform
   8115 Core processes (1213, 1507)
   8118 Dynamics and mechanics of faulting (8004)
   8120 Dynamics of lithosphere and mantle: general (1213)
   8121 Dynamics: convection currents, and mantle plumes
   8122 Dynamics: gravity and tectonics
   8123 Dynamics: seismotectonics
   8124 Earth’s interior: composition and state (1212, 7207, 7208, 8105)
   8125 Evolution of the Earth (0325)
   8130 Heat generation and transport
   8135 Hydrothermal systems (0450, 1034, 3017, 3616, 4832, 8424)
   8136 Impact phenomena (5420, 6022)
   8137 Hotspots, large igneous provinces, and flood basalt volcanism
   8138 Lithospheric flexure
   8139 Obduction tectonics
   8140 Ophiolites (3042)
   8145 Physics of magma and magma bodies
   8147 Planetary interiors (5430, 5724, 6024)
   8148 Planetary volcanism (5480, 8450)
   8149 Planetary tectonics (5475)
   8150 Plate boundary: general (3040)
   8155 Plate motions: general (3040)
   8157 Plate motions: past (3040)
   8158 Plate motions: present and recent (3040)
   8159 Rheology: crust and lithosphere (8031)
   8160 Rheology: general (1236, 8032)
   8162 Rheology: mantle (8033)
   8163 Rheology and friction of fault zones (8034)
   8164 Stresses: crust and lithosphere
   8166 Stresses: deep-seated
   8168 Stresses: general
   8169 Sedimentary basin processes
   8170 Subduction zone processes (1031, 3060, 3613, 8413)
   8175 Tectonics and landscape evolution
   8177 Tectonics and climatic interactions
   8178 Tectonics and magmatism
   8180 Tomography (6982, 7270)
   8185 Volcanic arcs
   8194 Instruments and techniques
   8199 General or miscellaneous

8400 VOLCANOLOGY

   8410 Geochemical modeling (1009, 3610)
   8411 Thermodynamics (0766, 1011, 3611)
   8412 Reactions and phase equilibria (1012, 3612)
   8413 Subduction zone processes (1031, 3060, 3613, 8170)
   8416 Mid-oceanic ridge processes (1032, 3614)
   8415 Intra-plate processes (1033, 3615)
   8424 Hydrothermal systems (0450, 1034, 3017, 3616, 4832, 8135)
   8425 Effusive volcanism (4302)
   8426 Mud volcanism (4302)
   8427 Subaqueous volcanism
   8428 Explosive volcanism (4302)
   8450 Planetary volcanism (5480, 6063, 8148)
   8404 Volcanoclastic deposits
   8408 Volcano/climate interactions (1605, 3309, 4321)
   8409 Atmospheric effects (0370)
   8430 Volcanic gases
   8429 Lava rheology and morphology
   8434 Magma migration and fragmentation
   8414 Eruption mechanisms and flow emplacement
   8439 Physics and chemistry of magma bodies
   8440 Calderas
   8445 Experimental volcanism
   8455 Tephrochronology (1145)
   8485 Remote sensing of volcanoes (4337)
   8486 Field relationships (1090, 3690)
   8419 Volcano monitoring (4302, 7280)
   8488 Volcanic hazards and risks (4302, 4328, 4333)
   8494 Instruments and techniques
   8499 General or miscellaneous

9300 GEOGRAPHIC LOCATION

   9305 Africa
   9310 Antarctica (4207)
   9315 Arctic region (0718, 4207)
   9320 Asia
   9325 Atlantic Ocean
   9330 Australia
   9335 Europe
   9340 Indian Ocean
   9345 Large bodies of water (e.g., lakes and inland seas) (0746)
   9350 North America
   9355 Pacific Ocean
   9360 South America
   9399 General or miscellaneous

9600 INFORMATION RELATED TO GEOLOGIC TIME

   9604 Cenozoic
   9605 Neogene
   9606 Paleogene
   9609 Mesozoic
   9610 Cretaceous
   9611 Jurassic
   9612 Triassic
   9614 Paleozoic
   9615 Permian
   9616 Carboniferous
   9617 Devonian
   9618 Silurian
   9620 Ordovician
   9621 Cambrian
   9619 Precambrian
   9622 Proterozoic
   9623 Archean
   9699 General or miscellaneous

9800 GENERAL OR MISCELLANEOUS

   9805 Instruments useful in three or more fields
   9810 New fields (not classifiable under other headings)
   9815 Notices and announcements
   9820 Techniques applicable in three or more fields

9900 CORRECTIONS