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Analysis on the Correlation between Snow Depth and L-Band Brightness Temperature over Arctic Multi-Year Sea Ice
Pages: 9-14
Year: Issue:  1
Journal: Ocean Technology

Keyword:  Ice BridgeSMOSsnow depthmulti-year sea icebrightness temperature;
Abstract: Kwok R, Maksym T. Snow depth of the Weddell and Bellingshausen sea ice covers from Ice Bridge surveys in 2010 and 2011: An examination[J]. Journal of Geophysical Research Oceans, 2015, 119(7):4141-4167.Abstract:The climate of Arctic is complicated with a high variability in time. Snow on sea ice in the Arctic is vital to global water circulation for its thermal insulation and dielectric properties. It has significant influence on sea ice concentration, climate and water cycle of the whole Arctic. Remote sensing is an essential method to observe the Arctic. However, the operational snow observations have the temporal and spatial limitation, for example, the AMSR-E snow depth product released by the National Snow and Ice Data Center(NSIDC) only provided the data over seasonal sea ice between 2002 to 2011. We use the snow depth data from Ice Bridge ICDIS4 dataset and the brightness temperature from Microwave Imaging Radiometer using Aperture Synthesis(MIRAS) on board Soil Moisture and Ocean Salinity(SMOS)satellite to analyze the correlation between the snow depth and brightness temperature in order to investigate the feasibility of snow depth retrieval from SMOS data.The Ice Bridge investigations are conducted on an annual repeating basis. Arctic and Greenland campaigns are conducted during March, April, and May. We choose the snow depth data from 2011 to 2015 to match up the SMOS brightness temperature using polar stereographic projection. We find that for snow depth from 0 cm to 50 cm, the brightness temperature shows an increasing tendency. The positive correlation between them makes it possible to retrieve the snow depth over multiyear sea ice using SMOS data in the Arctic, and it will be helpful to fill the blank of snow products over multiyear sea ice in the future.
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