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FIELD SURVEY GRID MONTHLY TO ANNUAL 30 METERS TO 100 METERS biota TRANSECT EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA IN SITU/LABORATORY INSTRUMENTS > PROBES > PROBES Arctic Ecology Plant Community Reflectance ANNUAL 500 METERS TO 1 KILOMETER Arctic Science environment geoscientificInformation EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > ACTIVE LAYER IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE KITE 1 KILOMETER Terrestrial Ecology EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > SPECTROMETERS EARTH SCIENCE > LAND SURFACE > SOILS > SOIL TEMPERATURE Arctic WEEKLY TO MONTHLY IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE 250 METERS TO 500 METERS CALM