globalchange  > 气候变化与战略
DOI: 10.5194/tc-14-3811-2020
论文题名:
Recent changes in pan-Antarctic region surface snowmelt detected by AMSR-E and AMSR2
作者: Zheng L.; Zhou C.; Zhang T.; Liang Q.; Wang K.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期:11
起始页码: 3811
结束页码: 3827
语种: 英语
英文关键词: algorithm ; AMSR-E ; brightness temperature ; energy balance ; EOS ; marginal ice zone ; metamorphism ; sea ice ; snowmelt ; Antarctic Ice Sheet ; Antarctica ; Indicator indicator
英文摘要: Surface snowmelt in the pan-Antarctic region, including the Antarctic ice sheet (AIS) and sea ice, is crucial to the mass and energy balance in polar regions and can serve as an indicator of climate change. In this study, we investigate the spatial and temporal variations in surface snowmelt over the entire pan-Antarctic region from 2002 to 2017 by using passive microwave remote sensing data. The stable orbits and appropriate acquisition times of the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) and the Advanced Microwave Scanning Radiometer 2 (AMSR2) enable us to take full advantage of daily brightness temperature (Tb) variations to detect surface snowmelt. The difference between AMSR-E/2 ascending and descending 36.5 GHz Tb values in vertical polarization (DAV36) was utilized to map the pan-Antarctic region snowmelt, as this method is unaffected by snow metamorphism. We evaluated the DAV36 algorithm against groundbased measurements and further improved the method over the marginal sea ice zone by excluding the effect of open water. Snowmelt detected by AMSR-E/2 data was more extensive and persistent than that detected by the Special Sensor Microwave/Imager (SSM/I) data. Continuous melt onset (CMO) ranged from August in the marginal sea ice zone to January in the Antarctic inland, and the early transient melt events occurred several days to more than 2 months earlier. The pan-Antarctic region CMO was significantly correlated (R D 0:54, p > 0:05) with the summer Southern Annular Mode (SAM). The decreased AIS melt extent was very likely linked (R D -0:82, p > 0:01) with the enhanced summer SAM. © 2020 Copernicus GmbH. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164643
Appears in Collections:气候变化与战略

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作者单位: School of Geospatial Engineering and Science, Sun Yat-sen University, Guangzhou, 510275, China; Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, 430079, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China; Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; School of Geographic Sciences, East China Normal University, Shanghai, 200241, China; Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO 80309, United States

Recommended Citation:
Zheng L.,Zhou C.,Zhang T.,et al. Recent changes in pan-Antarctic region surface snowmelt detected by AMSR-E and AMSR2[J]. Cryosphere,2020-01-01,14(11)
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