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Alphabetical index of categories: S

a b c d e f g h i j k l m n o p q r S t u v w x y z

Number of information resources is shown in parentheses after each term.

S -> sulfur (1) aviation safety (5) human environmental safety (12) safety issues (human) -> human environmental safety (12) sales and distribution services (12) ocean salinity (2) salinity (13) salt-water intrusion -> saltwater intrusion (6) salt deposit areas -> mineral deposit areas (92) salt evaporation ponds -> lakes (36) intermittent salt lakes -> lakes (36) salt lakes -> lakes (36) salt marshes -> wetlands (39) salt mines -> mine sites (15) intermittent salt ponds -> lakes (36) salt ponds -> lakes (36) saltwater intrusion (6) samarium (5) sample collections -> sample repositories (1) sample repositories (1) standard reference samples -> materials standards (3) core sampling -> drilling and coring (20) field sampling (141) ice core sampling (1) -> snow and ice cover -> drilling and coring plot sampling (2) transect sampling (1) water sampling (51) sanatariums -> medical facilities (2) sanatoriums -> medical facilities (2) sanctuaries (wildlife) -> reserves (6) sandbars -> bars (physiographic) (2) sand deposits (4) sandy areas -> beaches (13) sandy deserts -> deserts (10) sanitary landfills -> disposal sites (2) SAR interferometry -> IFSAR (4) satellite altimetry (2) -> altimetry measurement -> remote sensing satellite images (28) -> image collections -> remote sensing satellite imaging -> remote sensing (117) satellite photography -> visible light imaging (5) satellite stations -> data collection facilities (1) savannahs -> grasslands (11) savannas -> grasslands (11) sawmills -> industrial sites (3) Sb -> antimony (1) Sc -> scandium (1) geologic time scales (7) scandium (1) scanning electron microscopy (2) scenic areas -> parks (15) careers in science -> scientific careers (8) computer science (4) science centers (51) science discipline offices (3) Earth Science Information Centers (ESICs) -> reference services (3) citizen science programs (2) science programs (124) atmospheric sciences (44) biological sciences -> life sciences (425) earth sciences (1283) engineering sciences (24) geographic information sciences -> geography (159) information sciences (15) life sciences (425) ocean sciences (51) planetary sciences (8) sciences (1613) social sciences (6) soil sciences (5) chemistry (Earth sciences) -> geochemistry (176) chemistry (life sciences) -> biochemistry (11) science strategy -> strategic plans (6) scientific careers (8) improvement of scientific data usability (1) scientific reports -> reports (106) public participation in scientific research -> citizen science programs (2) scientific research bases -> research facilities (4) scientific software (30) scientists-at-work photographs (2) -> scientific careers -> image collections false scorpions -> arachnids (1) bridge scour -> scour (2) scour (2) scrap yards -> disposal sites (2) scrubland ecosystems -> shrubland ecosystems (6) scrublands -> shrublands (2) Se -> selenium (3) sea-floor characteristics (37) sea-ice concentration -> sea ice concentration (3) sea-level change (11) sea-level rise -> sea-level change (11) sea-surface temperature -> sea surface temperature (10) sea anemones -> coelenterates (13) seachannels (seafloor) -> seafloor features (15) deep sea fisheries -> marine fishery resources (3) deep sea fishing -> marine fishery resources (3) seafloor characteristics -> sea-floor characteristics (37) sea floor characteristics -> sea-floor characteristics (37) seafloor features (15) sea floor topography -> bathymetry (24) seagrass -> aquatic vegetation (3) sea ice concentration (3) sea ice cover -> sea ice concentration (3) search engines -> search services (11) search services (11) inland seas -> lakes (36) seas (11) national seashores -> parks (15) seasonal migration -> migration (organisms) (4) sea squirts -> tunicates (2) sea surface temperature (10) seawalls -> breakwaters (3) seaweeds -> aquatic vegetation (3) second-order administrative divisions -> countries, 2nd order divisions (1) geologic sections -> stratigraphic sections (26) hydrographic sections -> hydrogeology (37) stratigraphic sections (26) sections (geologic) -> stratigraphic sections (26) sections (stratigraphic) -> stratigraphic sections (26) sedimentary rocks (14) alluvial sedimentation -> sedimentation (30) sedimentation (30) sediment geochemistry (4) -> unconsolidated deposits -> chemical analysis sedimentology (19) eolian sediments -> unconsolidated deposits (20) sediments -> unconsolidated deposits (20) estuarine sediment transport (1) -> sediment transport -> estuarine processes marine sediment transport (13) -> ocean processes -> sediment transport sediment transport (47) segmented worms (1) seismic activity -> earthquake occurrences (42) seismic exploration (1) -> seismic methods -> natural resource exploration seismic hazard maps (14) -> maps and atlases -> earthquake occurrences seismic imaging -> seismic methods (44) seismicity -> earthquake occurrences (42) seismicity maps (7) -> earthquake probabilities -> maps and atlases seismic methods (44) seismic monitoring stations -> field monitoring stations (2) seismic networking (16) seismic profiles -> seismic methods (44) seismic reflection methods (7) seismic reflection survey maps (2) -> seismic reflection methods -> maps and atlases seismic refraction methods (6) seismic tomography -> tomography (1) seismograms -> seismic methods (44) earthquake seismology (31) -> seismology -> earthquake occurrences engineering seismology (4) -> seismology -> engineering sciences seismology (61) seismometry -> seismic methods (44) selenium (3) semi-independent political entities -> political areas (1) optical backscatterance sensing -> optical methods (3) remote sensing (117) space-borne sensing -> remote sensing (117) Special Sensor Microwave/Imager (SSM/I) -> SSM/I (1) gas-oil separation plants -> industrial sites (3) DNA sequencing (10) gene sequencing -> DNA sequencing (10) carbon sequestration (6) serial publications -> reports (106) published series -> reports (106) time series analysis (3) time series datasets (6) lanthanide series elements (1) map servers -> map interfaces (26) web service development (1) data services (26) ecosystem services (1) educational services (15) GIS services -> web map services (5) information services (82) news services (6) reference services (3) sales and distribution services (12) search services (11) user services (109) web map services (5) settlements -> populated places (7) sewage disposal -> waste treatment and disposal (23) sewage treatment plants -> waterworks (1) sexing (plants & animals) (3) sexing (plants and animals) -> sexing (plants & animals) (3) mine shafts -> mine sites (15) shaking maps (seismic) (14) -> maps and atlases -> earthquake occurrences oil shale resources (7) sheepfolds -> agricultural sites (6) ice sheets -> ice masses (9) sheikdoms -> administrative areas (8) shelf edges (ocean) -> continental margins (11) shelf valleys (seafloor) -> seafloor features (15) shellfish (3) animal shelters -> buildings (13) shelters -> buildings (13) continental shelves -> continental margins (11) shelves, continental -> continental margins (11) ship tracks -> transportation features (4) shoals -> bars (physiographic) (2) shopping centers -> commercial sites (3) shopping malls -> commercial sites (3) shops -> buildings (13) shorebirds -> birds (70) shoreline erosion (28) -> erosion -> coastal processes shoreline retreat (28) -> erosion -> coastal processes shorelines -> coastal zones (77) shores -> coastal zones (77) short grass ecosystems -> grassland ecosystems (16) shrines -> monuments (2) shrubland ecosystems (6) shrublands (2) side-scan sonar -> sidescan sonar (21) sidescan sonar (21) sierra -> mountain ranges (2) silver (1) mathematical simulation (21) sinkhole formation (2) sinkholes -> physiographic features (237) sinks -> physiographic features (237) siphon (physiographic) -> physiographic features (237) sisal plantations -> agricultural sites (6) agricultural sites (6) commercial sites (3) dam sites (8) disposal sites (2) ecological research sites (2) generation sites -> power generation sites (1) highway maintenance sites -> transportation features (4) industrial sites (3) institutional sites (2) mill sites -> industrial sites (3) mine sites (15) observation sites -> research areas (3) parking sites (1) pastoral sites -> agricultural sites (6) power generation sites (1) refuse disposal sites -> disposal sites (2) solar power generation sites -> power generation sites (1) test sites -> research areas (3) waste disposal sites -> disposal sites (2) windmill power generation sites -> power generation sites (1) adits (mine sites) -> mine sites (15) reservations (nature sites) -> reserves (6) slag heaps -> disposal sites (2) slides (land) -> landslides (28) slides (natural) -> physiographic features (237) slope processes (30) continental slopes -> continental margins (11) slopes -> physiographic features (237) talus slopes -> physiographic features (237) slope stability -> landslide susceptibility assessment (7) slope stability maps (2) -> maps and atlases -> landslide susceptibility assessment sloughs -> wetlands (39) slues -> wetlands (39) sluices -> hydrographic structures (35) slumps -> landslides (28) Sm -> samarium (5) smelters -> industrial sites (3) Sn -> tin (2) acid snow -> acid deposition (6) snow -> precipitation (atmospheric) (33) snow and ice cover (19) snowfall -> precipitation (atmospheric) (33) snowfall measurement (10) -> precipitation (atmospheric) -> field inventory and monitoring snowpack -> snow and ice cover (19) social sciences (6) socioeconomics -> culture and demographics (31) scientific software (30) software development (1) soil chemistry (4) soil creep -> slope processes (30) soil formation (2) soil permeability -> permeability (1) soil pollution (1) -> soil resources -> contamination and pollution soil porosity -> porosity (1) soil resources (7) soil sciences (5) solar power generation sites -> power generation sites (1) side-scan sonar -> sidescan sonar (21) sidescan sonar (21) sonar methods (27) magnetotelluric sounding -> electromagnetic surveying (11) resistivity sounding -> electrical resistivity logging (2) sound recordings (4) sounds (bodies of water) -> channels (4) energy sources -> energy resources (144) crowd sourcing (science) -> citizen science programs (2) space-borne sensing -> remote sensing (117) advanced spaceborne thermal emission and reflection radiometer -> multispectral imaging (26) space centers -> research facilities (4) spatial analysis (31) Special Sensor Microwave/Imager (SSM/I) -> SSM/I (1) alien species -> nonindigenous species (52) distribution of species -> biogeography (73) endangered species (22) endemic species (2) exotic species -> nonindigenous species (52) foreign species -> nonindigenous species (52) indigenous species -> native species (5) introduced species -> nonindigenous species (52) invader species -> invasive species (28) invasive species (28) keystone species (3) migratory species (18) native species (5) non-indigenous species -> nonindigenous species (52) non-native species -> nonindigenous species (52) nonindigenous species (52) nuisance species (2) species distribution -> biogeography (73) species distribution maps (12) -> maps and atlases -> biogeography species diversity (5) species geographic range -> biogeography (73) indicator species observation -> ecosystem monitoring (62) specimen collecting (21) collection of specimens -> specimen collecting (21) airborne visible infrared imaging spectrometer -> AVIRIS (3) gamma-ray spectrometric surveying -> aeroradiometric surveying (1) inductively coupled plasma-atomic emission spectrometry -> atomic emission spectroscopy (4) mass spectrometry -> mass spectroscopy (7) Moderate-resolution imaging spectroradiometer -> multispectral imaging (26) atomic emission spectroscopy (4) hand-held field spectroscopy -> handheld field spectroscopy (1) handheld field spectroscopy (1) mass spectroscopy (7) nuclear magnetic resonance spectroscopy -> chemical analysis (60) particle-beam spectroscopy (1) speeches and testimony (1) speleology -> geomorphology (41) spiders -> arachnids (1) oil spills (11) -> industrial pollution -> petroleum spillways -> dam sites (8) spits -> bars (physiographic) (2) sponges (2) sport fishing -> recreational fishery resources (1) spring ecosystems -> freshwater ecosystems (29) hot springs -> thermal features (6) mineral springs -> springs (hydrographic) (2) sulfur springs -> springs (hydrographic) (2) springs (hydrographic) (2) village squares -> parks (15) sea squirts -> tunicates (2) Sr -> strontium (6) SSM/I (1) SSM/I images -> SSM/I (1) sst -> sea surface temperature (10) slope stability -> landslide susceptibility assessment (7) slope stability maps -> maps and atlases (217) light stable-isotope analysis -> light stable isotope analysis (14) light stable isotope analysis (14) stable isotope analysis -> light stable isotope analysis (14) bankfull stage -> floods (61) flood stage -> streamflow (157) stream stage -> streamflow (157) standard reference samples -> materials standards (3) materials standards (3) standards (10) standards development (8) state forests -> parks (15) state parks -> parks (15) freely associated states -> political areas (1) United States Government establishments -> buildings (13) bailing stations -> agricultural sites (6) coast guard stations -> buildings (13) experiment stations -> research facilities (4) field monitoring stations (2) field stations -> field monitoring stations (2) fire stations -> buildings (13) forest stations -> buildings (13) gaging stations (6) guard stations -> buildings (13) hydroelectric power stations -> power generation sites (1) inspection stations -> buildings (13) meteorological stations -> data collection facilities (1) power stations -> power generation sites (1) ranger stations -> buildings (13) satellite stations -> data collection facilities (1) seismic monitoring stations -> field monitoring stations (2) stations -> buildings (13) stream gaging stations -> field monitoring stations (2) weather stations -> research facilities (4) whaling stations -> industrial sites (3) multivariate statistical analysis (1) statistical analysis (21) statistical surveying (1) statues -> monuments (2) statutes -> laws and regulations (2) steam plants -> power generation sites (1) stock routes -> transportation features (4) stockyards -> agricultural sites (6) crushed stone -> building stone resources (4) dimension stone -> building stone resources (4) building stone resources (4) stony deserts -> deserts (10) storage fields (petroleum) -> oil fields (1) stores -> commercial sites (3) geomagnetic storms -> magnetic storms (4) magnetic storms (4) storms (40) storm surge (8) stormwater runoff -> runoff (16) strain history -> deformation (geologic) (10) straits -> channels (4) strands -> beaches (13) strategic plans (6) science strategy -> strategic plans (6) stratigraphic sections (26) stratigraphy (7) stream-flow monitoring -> stream-gage measurement (137) stream-gage measurement (137) stream-gage monitoring -> stream-gage measurement (137) dry stream beds -> streams (96) stream bends -> streams (96) stream current -> streamflow (157) stream current monitoring -> stream-gage measurement (137) stream discharge (17) stream discharge monitoring -> stream discharge (17) stream ecosystems -> freshwater ecosystems (29) streamflow (157) stream flow -> streamflow (157) streamflow data (81) -> streamflow -> datasets streamflow modeling (25) -> streamflow -> mathematical modeling streamflow monitoring -> stream-gage measurement (137) stream flow monitoring -> stream-gage measurement (137) stream gage monitoring -> stream-gage measurement (137) stream gaging stations -> field monitoring stations (2) stream mouths -> streams (96) intermittent streams -> streams (96) streams (96) stream stage -> streamflow (157) streets -> roadways (2) strike-slip faults -> faults (17) strip mines -> mine sites (15) strong motion -> earthquake occurrences (42) strontium (6) structural geology (7) earth structure (13) geologic structure (36) organizational structure (64) structure contours (2) hydrographic structures (35) structures -> buildings (13) institutional structures and activities (336) student unions -> buildings (13) studios -> buildings (13) isotopic tracer study -> tracer study (3) radioisotope tracer study -> tracer study (3) tracer study (3) study areas -> research areas (3) sub-surface dams -> dam sites (8) subbituminous coal resources -> coal resources (15) subduction -> tectonic processes (21) submarine canyons (1) subsea features -> seafloor features (15) subsidence (8) substations -> buildings (13) water subsurface -> groundwater (200) subsurface maps (93) -> maps and atlases -> geology suburbs -> populated places (7) ecologic succession -> succession (biological) (1) succession (biological) (1) sugar mills -> industrial sites (3) sugar plantations -> agricultural sites (6) sugar refineries -> industrial sites (3) sulfur (1) sulfur springs -> springs (hydrographic) (2) sultanates -> administrative areas (8) mountain summits (1) summits -> mountain summits (1) public water supply -> domestic water use (9) water supply and demand (85) external research support (4) product support -> customer support and user feedback (4) technical support -> customer support and user feedback (4) customer support and user feedback (4) decision support methods (12) support offices (2) potentiometric surface -> groundwater level (27) temperature (sea surface) -> sea surface temperature (10) surface-water/ground-water interaction -> groundwater and surface-water interaction (5) groundwater and surface-water interaction (5) surface-water level (7) land surface characteristics (52) sea surface temperature (10) surface water (non-marine) (182) surface water/groundwater interaction -> groundwater and surface-water interaction (5) surface water quality (66) surficial deposits -> unconsolidated deposits (20) surficial geologic maps (14) -> surficial geologic units -> maps and atlases surficial geologic units (17) storm surge (8) aeromagnetic surveying (10) aeroradiometric surveying (1) electromagnetic surveying (11) gamma-ray spectrometric surveying -> aeroradiometric surveying (1) land surveying (5) magnetic surveying (4) -> aeromagnetic surveying -> electromagnetic surveying statistical surveying (1) surveying -> land surveying (5) seismic reflection survey maps -> seismic reflection methods (7) geochemical surveys -> chemical analysis (60) magnetic susceptibility analysis (2) landslide susceptibility assessment (7) landslide susceptibility maps (2) -> landslide susceptibility assessment -> maps and atlases suspended load -> sediment transport (47) suspended material (water) (17) mangrove swamps -> wetlands (39) swamps -> wetlands (39) symbiosis (1) Interferometric Synthetic Aperture Radar (IFSAR) -> IFSAR (4) geographic information system (GIS) datasets -> geospatial datasets (112) systematics and taxonomy (15) information system design and development (43) knowledge organization system development (2) coordinate systems -> map coordinate systems (3) early warning systems -> hazard preparedness (67) geographic coordinate systems -> map coordinate systems (3) grid coordinate systems -> map coordinate systems (3) land partitioning systems -> cadastral and legal land descriptions (1) map coordinate systems (3) river systems (34) geographic information systems (GIS) (23)

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