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EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA
54
FIELD SURVEY
51
30 METERS TO 100 METERS
37
GRID
32
MONTHLY TO ANNUAL
30
ANNUAL
24
TRANSECT
21
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > PHOTON/OPTICAL DETECTORS > CAMERAS > CAMERAS
19
KITE
14
LESS THAN 1 METER
14
POINT
14
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL MOISTURE PROBE
11
500 METERS TO 1 KILOMETER
9
EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > SPECTROMETERS
9
250 METERS TO 500 METERS
7
DAILY TO WEEKLY
6
EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
6
IN SITU/LABORATORY INSTRUMENTS > PROBES > SOIL TEMPERATURE PROBE
6
UNKNOWN
6
IN SITU/LABORATORY INSTRUMENTS > PROBES > PROBES
5
EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
4
EARTH REMOTE SENSING INSTRUMENTS > ACTIVE REMOTE SENSING > PROFILERS/SOUNDERS > LIDAR/LASER SOUNDERS > LIDAR > LIGHT DETECTION AND RANGING
3
EARTH SCIENCE > LAND SURFACE > SURFACE RADIATIVE PROPERTIES > REFLECTANCE
2
1 KILOMETER
1
EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES
1
EARTH SCIENCE > CRYOSPHERE > FROZEN GROUND > ACTIVE LAYER
1
ENVIRONMENT
1
WEEKLY TO MONTHLY
1
environment
1
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