Long-Term Arctic Snow/Ice Interface Temperature from Special Sensor for Microwave Imager Measurements
AbstractThe Arctic sea ice region is the most visible area experiencing global warming-induced climate change. However, long-term measurements of climate-related variables have been limited to a small number of variables such as the sea ice concentration, extent, and area. In this study, we attempt to produce a long-term temperature record for the Arctic sea ice region using Special Sensor for Microwave Imager (SSM/I) Fundamental Climate Data Record (FCDR) data. For that, we developed an algorithm to retrieve the wintertime snow/ice interface temperature (SIIT) over the Arctic Ocean by counting the effect of the snow/ice volume scattering and ice surface roughness on the apparent emissivity (the total effect is referred to as the correction factor). A regression equation was devised to predict the correction factor from SSM/I brightness temperatures (TBs) only and then applied to SSM/I 19.4 GHz TB to estimate the SIIT. The obtained temperatures were validated against collocated Cold Regions Research and Engineering Laboratory (CRREL) ice mass balance (IMB) drifting buoy-measured temperatures at zero ice depth. It is shown that the SSM/I retrievals are in good agreement with the drifting buoy measurements, with a correlation coefficient of 0.95, bias of 0.1 K, and root-mean-square error of 1.48 K on a daily time scale. By applying the algorithm to 24-year (1988–2011) SSM/I FCDR data, we were able to produce the winter-time temperature at the sea ice surface for the 24-year period. View Full-Text
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Lee, S.-M.; Sohn, B.-J.; Kummerow, C.D. Long-Term Arctic Snow/Ice Interface Temperature from Special Sensor for Microwave Imager Measurements. Remote Sens. 2018, 10, 1795.
Lee S-M, Sohn B-J, Kummerow CD. Long-Term Arctic Snow/Ice Interface Temperature from Special Sensor for Microwave Imager Measurements. Remote Sensing. 2018; 10(11):1795.Chicago/Turabian Style
Lee, Sang-Moo; Sohn, Byung-Ju; Kummerow, Christian D. 2018. "Long-Term Arctic Snow/Ice Interface Temperature from Special Sensor for Microwave Imager Measurements." Remote Sens. 10, no. 11: 1795.
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