Retrieving snow mass from GRACE terrestrial water storage change with a land surface model

Details Retrieving snow mass from GRACE terrestrial water storage change with a land surface model Retrieving snow mass from GRACE terrestrial water storage change with a land surface model

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3415704n&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 15, CiteID L15704

Physics

10

Cryosphere: Snow (1827, 1863), Cryosphere: Remote Sensing, Global Change: Water Cycles (1836), Hydrology: Snow And Ice (0736, 0738, 0776, 1827), Hydrology: Soil Moisture

Scientific paper

A reliable snow water equivalent (SWE) product is critical for climate and hydrology studies in Arctic regions. Passive microwave sensors aboard satellites provide a capability of observing global SWE and have produced many SWE datasets. However, these datasets have significant errors in boreal forest regions and where snowpack is deep or wet. The Gravity Recovery and Climate Experiment (GRACE) satellites are measuring changes in terrestrial water storage (TWS), of which snow mass is the primary component in winter Arctic river basins. This paper shows SWE can be derived from GRACE TWS change in regions where the ground is not covered by snow in a summer month if accurate changes in below-ground water storage (including soil water and groundwater) can be provided by a land surface model. Based on gravity change, the GRACE-derived SWE estimates are not affected by the boreal forest canopy and are more accurate in deep snow regions than microwave retrievals. The paper also discusses the uncertainties in the SWE retrievals.

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