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Spatial and Temporal Variability of Minimum Brightness Temperature at the 6.925 GHz Band of AMSR2 for the Arctic and Antarctic Oceans

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Title
Spatial and Temporal Variability of Minimum Brightness Temperature at the 6.925 GHz Band of AMSR2 for the Arctic and Antarctic Oceans
Other Titles
남국과 북극의 AMSR2 6.925 GHz 최소 밝기온도의 시공간 변동성
Authors
Kwon, Young-Joo
Hong, Sungwook
Park, Jeong-Won
Kim, Seung Hee
Kim, Jong-Min
Kim, Hyun-cheol
Subject
Environmental Sciences & EcologyGeologyRemote SensingImaging Science & Photographic Technology
Keywords
passive microwaveoceanAMSR2tie pointArctic amplification
Issue Date
2021-06
Citation
Kwon, Young-Joo, et al. 2021. "Spatial and Temporal Variability of Minimum Brightness Temperature at the 6.925 GHz Band of AMSR2 for the Arctic and Antarctic Oceans". REMOTE SENSING, 13(11): 1-14.
Abstract
The minimum brightness temperature (mBT) of seawater in the polar region is an important parameter in algorithms for determining sea ice concentration or snow depth. To estimate the mBT of seawater at 6.925 GHz for the Arctic and Antarctic Oceans and to find their physical characteristics, we collected brightness temperature and sea ice concentration data from the Advanced Microwave Scanning Radiometer 2 (AMSR2) for eight years from 2012 to 2020. The estimated mBT shows constant annual values, but we found a significant difference in the seasonal variability between the Arctic and Antarctic Oceans. We calculated the mBT with the radiative transfer model parameterized by sea surface temperature (SST), sea surface wind speed (SSW), and integrated water vapor (IWV) and compared them with our observations. The estimated mBT represents the modeled mBT emitted from seawater under conditions of 2-5 m/s SSW and SST below 0 ˚C, except in the Arctic summer. The exceptional summer mBT in the Arctic Ocean was related to unusually high SST. We found evidence of Arctic amplification in the seasonal variability of Arctic mBT.
URI
https://repository.kopri.re.kr/handle/201206/12982
DOI
http://dx.doi.org/10.3390/rs13112122
Type
Article
Station
해당사항없음
Indexed
SCIE
Appears in Collections  
2021-2021, Development of Integrated Health Management System for Polar Operation Ships and Offshore Structures Based on Satellite Data (21-21) / Kim, Hyun-cheol (PN21030)
2021-2021, Study on remote sensing for quantitative analysis of changes in the Arctic cryosphere (21-21) / Kim, Hyun-cheol (PE21040)
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