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EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA
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EARTH SCIENCE > CLIMATE INDICATORS > TERRESTRIAL HYDROSPHERE INDICATORS > PERMAFROST MELT
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EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > ACTIVE LAYER
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EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > PERMAFROST
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EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > ACTIVE LAYER
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FIELD SURVEY
EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS
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EARTH SCIENCE > BIOSPHERE > VEGETATION > BIOMASS
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EARTH SCIENCE > LAND SURFACE > SOILS > PERMAFROST
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EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
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EARTH SCIENCE > BIOSPHERE > VEGETATION > CARBON
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environment
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EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > SOIL TEMPERATURE
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EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES
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EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > NUTRIENT CYCLING
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EARTH SCIENCE > CLIMATE INDICATORS > LAND SURFACE/AGRICULTURE INDICATORS > SOIL TEMPERATURE
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EARTH SCIENCE > LAND SURFACE > FROZEN GROUND > PERMAFROST
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EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > PERMAFROST
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1 MINUTE TO 1 HOUR
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1 SECOND TO 1 MINUTE
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250 METERS TO 500 METERS
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EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > POSITIONING/NAVIGATION
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EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS
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EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
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EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES
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EARTH SCIENCE > CLIMATE INDICATORS > CRYOSPHERIC INDICATORS > ICE DEPTH/THICKNESS
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EARTH SCIENCE > HUMAN DIMENSIONS > INFRASTRUCTURE
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EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER
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EARTH SCIENCE > LAND SURFACE > SOILS > SOIL CHEMISTRY
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EARTH SCIENCE > LAND SURFACE > SOILS > SOIL COLOR
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