Alphabetical listing of categories: I

ice -> snow and ice cover (20) icebergs -> ice masses (8) icecap depressions -> ice masses (8) icecap domes -> ice masses (8) icecaps -> ice masses (8) sea ice concentration (3) ice core sampling (1) -> snow and ice cover WITH drilling and coring sea ice cover -> sea ice concentration (3) snow and ice cover (20) icefalls -> ice masses (8) ice fields -> ice masses (8) ice masses (8) ice patches -> ice masses (8) ice sheets -> ice masses (8) ichthyology (8) ICP-AES -> atomic emission spectroscopy (4) IFSAR (4) igneous rocks (10) image analysis (4) image collections (101) AVHRR images (5) -> image collections WITH AVHRR Landsat images (7) -> image collections WITH multispectral imaging remote-sensing images (25) -> remote sensing WITH image collections satellite images (25) -> image collections WITH remote sensing SSM/I images -> SSM/I (1) airborne imaging -> remote sensing (108) doppler radar imaging (2) hyperspectral imaging (4) infrared imaging (19) microwave imaging (1) multispectral imaging (21) radar imaging (4) satellite imaging -> remote sensing (108) seismic imaging -> seismic methods (44) thermal imaging (2) visible light imaging (4) airborne visible infrared imaging spectrometer -> AVIRIS (3) Moderate-resolution imaging spectroradiometer -> multispectral imaging (21) asteroid impact -> impact cratering (1) bolide impact -> impact cratering (1) comet impact -> impact cratering (1) meteor impact -> impact cratering (1) environmental impact assessment -> environmental assessment (43) impact cratering (1) human impacts (100) impoundment -> water resource management (21) improvement of scientific data usability (1) in-stream water use -> instream water use (9) incinerators -> disposal sites (2) inclines -> physiographic features (214) independent political entities -> political areas (1) composite burn index (1) -> fire damage WITH remote sensing catalogs and indexes (98) indexes -> catalogs and indexes (98) index fossils -> fossils (14) indicator species observation -> ecosystem monitoring (65) indigenous species -> native species (5) inductively coupled plasma-atomic emission spectrometry -> atomic emission spectroscopy (4) industrial areas -> industrial sites (2) industrial mineral resources -> nonmetallic mineral resources (12) industrial minerals -> mineral resources (60) industrial parks -> industrial sites (2) industrial pollution (24) industrial sites (2) industrial water use (4) infiltration (water) -> percolation (1) infirmaries -> medical facilities (2) avian influenza (7) biological informatics (4) informatics activities -> information technology methods (20) information architecture (1) Earth Science Information Centers (ESICs) -> reference services (4) information management -> data management (5) geographic information sciences -> geography (155) information sciences (15) information services (88) geographic information system (GIS) datasets -> geospatial datasets (115) information system design and development (41) geographic information systems (GIS) (23) information technology methods (20) infrared imaging (19) airborne visible infrared imaging spectrometer -> AVIRIS (3) inland fishery resources (5) inland seas -> lakes (33) inlets -> channels (4) inner core (earth) (1) inns -> buildings (12) InSAR -> IFSAR (4) careers in science -> scientific careers (8) insecticide contamination -> pesticide and herbicide contamination (23) insects (20) inspection stations -> buildings (12) institutes -> institutional sites (2) research institutes -> research facilities (4) institutional sites (2) institutional structures and activities (335) institutions -> institutional sites (2) instream water use (9) technical instructions -> manuals (17) instrument design and development (30) insular ecology -> island ecosystems (1) data integration (2) aquifer-surface water interaction -> groundwater and surface-water interaction (4) ground-water/surface-water interaction -> groundwater and surface-water interaction (4) groundwater/surface water interaction -> groundwater and surface-water interaction (4) groundwater and surface-water interaction (4) ocean-atmosphere interaction (7) surface-water/ground-water interaction -> groundwater and surface-water interaction (4) surface water/groundwater interaction -> groundwater and surface-water interaction (4) interagency programs (43) interdisciplinary directorates -> mission directorates (7) interdisciplinary programs (6) interdune troughs -> dunes (5) map interfaces (27) Interferometric Synthetic Aperture Radar (IFSAR) -> IFSAR (4) SAR interferometry -> IFSAR (4) interfluves -> plains (1) intermittent lakes -> lakes (33) intermittent oxbow lakes -> lakes (33) intermittent ponds -> lakes (33) intermittent pools -> lakes (33) intermittent reservoirs -> reservoirs (12) intermittent salt lakes -> lakes (33) intermittent salt ponds -> lakes (33) intermittent streams -> streams (85) intermittent wetlands -> wetlands (38) international programs (8) intersections -> roadways (2) intertidal zones -> coastal zones (76) introduced species -> nonindigenous species (49) salt-water intrusion -> saltwater intrusion (6) saltwater intrusion (6) intrusive rocks -> Plutonic rocks (1) invader species -> invasive species (27) invasive species (27) fish inventories (10) -> fish WITH field sampling inventory -> field inventory and monitoring (375) field inventory and monitoring (375) invertebrate paleontology (1) invertebrates (64) invertebrate zoology (11) iron (3) iron mines -> mine sites (15) irrigated fields -> agricultural sites (5) irrigation (3) island arcs -> islands (11) island ecosystems (1) islands (11) land-tied islands -> islands (11) mangrove islands -> islands (11) isles -> islands (11) islets -> islands (11) isostasy (1) carbon isotope analysis (5) light stable isotope analysis (14) oxygen isotope analysis (6) stable isotope analysis -> light stable isotope analysis (14) isotopic analysis (23) isotopic tracer study -> tracer study (3) safety issues (human) -> human environmental safety (10)

Alphabetical index of categories: I