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EROSION/SEDIMENTATION (13)
degradation, entrainment, erosion, landslides, sediment chemistry...
SOILS (15)
calcium, carbon, cation exchange capacity, denitrification rate, electrical conductivity...
FROZEN GROUND (12)
active layer, cryosols, ground ice, periglacial processes, permafrost...
SURFACE RADIATIVE PROPERTIES (21)
albedo, anisotropy, emissivity, reflectance...
GEOMORPHIC LANDFORMS/PROCESSES (12)
aeolian processes, coastal processes, fluvial processes, glacial processes, karst processes...
SURFACE THERMAL PROPERTIES (16)
land heat capacity, land surface temperature, skin temperature...
LAND USE/LAND COVER (28)
land productivity, land resources, land use classes, land use/land cover classification...
TOPOGRAPHY (24)
landforms, surface roughness, terrain elevation, topographic effects...
LANDSCAPE (16)
landscape ecology, landscape management, landscape patterns, reclamation/revegetation/restoration, reforestation...

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