Historical Observations

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3.1 Meteorological Data
3.1.1 Introduction
3.1.2 Near surface air temperature
3.1.3 Total Precipitation
Supplement to 3.1.3: Precipitation data derived from satellites
3.1.4 Surface Humidity
3.1.5 Surface Wind Speed and Direction
3.1.6 Supplementary data
3.2 Snow and hydrology data
3.2.1 Snow related variables
3.2.2 River Discharge
3.3 Sea ice data
3.3.1 Introduction
3.3.2 Sea ice concentration
3.3.3 Sea Ice Thickness
3.3.4 Sea Ice Drift
3.3.5 Other Data Portals
3.4 Permafrost data
3.4.1 Introduction
3.4.2 Ground Temperature
3.4.3 Subsurface Ice Content
3.4.4 Permafrost extent
3.4.5 Landform Inventories
3.4.6 Ground Subsidence and Active-Layer Thickness