Microbiology and microbial ecology (0465) Natural products chemistry Nutrients and nutrient cycling (0470, 1050) Marine organic chemistry (0470, 1050) Oxidation/reduction reactions (0471) Photochemistry Photosynthesis Physical chemistry Phytoplankton Population dynamics and ecology Radioactivity and radioisotopes Sedimentation (1861) Sorptive scavenging Stable isotopes (0454, 1041) Symbiosis Trace elements (0489) Zooplankton Instruments, sensors, and techniques General or miscellaneous PALEOCEANOGRAPHY (0473, 3344) Abrupt/rapid climate change (1605) Anthropogenic effects (1803, 4802) Atmospheric transport and circulation Aerosols (0305, 4801) Albedo Astronomical forcing Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4805) Continental climate records Corals (4220) Cosmogenic isotopes (1150) Dendrochronology El Nino (4522) Geochemical tracers Glacial Global climate models (1626, 3337) Greenhouse gases Ice cores (0724) Insolation forcing Interglacial Interhemispheric phasing Isotopic stage Limnology (0458, 1845, 4239) Micropaleontology (0459, 3030) Milankovitch theory Paleocene/Eocene thermal maximum Paleoecology Palynology Sea surface temperature Speleothems Stadial Thermohaline Upwelling (4279) Instruments and techniques General or miscellaneous PHYSICAL PROPERTIES OF ROCKS Acoustic properties Fracture and flow Magnetic and electrical properties (0925) Microstructure Permeability and porosity Plasticity, diffusion, and creep Thermal properties Transport properties Wave attenuation Instruments and techniques General or miscellaneous PLANETARY SCIENCES: ASTROBIOLOGY Formation of stars and planets Planetary atmospheres, clouds, and hazes (0343) Origin of life Hydrothermal systems and weathering on other planets Early environment of Earth PLANETARY SCIENCES: SOLID SURFACE PLANETS Atmospheres (0343, 1060) Aurorae and airglow Composition (1060, 3672) Erosion and weathering Glaciation Gravitational fields (1221) Heat flow Hydrology and fluvial processes Ices Impact phenomena, cratering (6022, 8136) Interactions with particles and fields Interiors (8147) Ionospheres (2459) Magnetic fields and magnetism Magnetospheres (2756) Meteorology (3346) Orbital and rotational dynamics (1221) Origin and evolution Physical properties of materials Polar regions Remote sensing Rings and dust Surface materials and properties Tectonics (8149) Volcanism (6063, 8148, 8450) Instruments and techniques General or miscellaneous PLANETARY SCIENCES: FLUID PLANETS Atmospheres (0343, 1060) Aurorae Composition (1060) Gravitational fields (1221) Interactions with particles and fields Interiors (8147) Ionospheres (2459) Magnetic fields and magnetism Magnetospheres (2756) Meteorology (3346) Orbital and rotational dynamics (1221) Origin and evolution Polar regions Rings and dust Tidal forces Tori and exospheres Instruments and techniques General or miscellaneous PLANETARY SCIENCES: COMETS AND SMALL BODIES Atmospheres (1060) Aurorae, airglow, and X-ray emission Composition (1060) Dust Erosion and weathering Gravitational fields (1221) Ices Impact phenomena (5420, 8136) Interactions with solar wind plasma and fields Comets: dust tails and trails (6210) Interiors (8147) Ionospheres (2459) Magnetic fields and magnetism Magnetospheres (2756) Orbital and rotational dynamics Origin and evolution Physics and chemistry of materials Plasma and MHD instabilities (2149, 2752, 7836) Surfaces Radiation and chemistry Volcanism (5480, 8450) Instruments and techniques General or miscellaneous PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS Asteroids (4308) Asteroids: satellites Comparative planetology Comets (4308, 6023) Centaurs Dust Jovian satellites Io Europa Ganymede Callisto Jupiter Kuiper belt objects Mars Martian satellites Mercury Meteorites and tektites (1028, 3662) Meteors Moon (1221) Neptune Neptunian satellites Triton Planetary rings Pluto and satellites Saturn Saturnian satellites Titan Enceladus Trans-Neptunian objects Uranian satellites Uranus Venus Extra-solar planets Instruments and techniques General or miscellaneous POLICY SCIENCES (4338, 7964) Benefit-cost analysis (4333) Decision making under uncertainty (1918, 4324, 4339) Demand estimation Institutions Legislation