An assessment of arctic sea ice concentration retrieval based on “HY-2” scanning radiometer data using field observations during CHINARE-2012 and other satellite instruments

SHI Lijiang; LU Peng; CHENG Bin; KARVONEN Juha; WANG Qimao; LI Zhijun; HAN Hongwei

doi:10.1007/s13131-015-0632-9

利用2012年中国北极考察现场观测数据和卫星遥感资料评估海洋2号卫星扫描辐射计数据反演北极海冰密集度的研究

doi: 10.1007/s13131-015-0632-9

1.
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
2.
Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
3.
Finnish Meteorological Institute, Helsinki FI-00101, Finland

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出版历程
- 收稿日期: 2014-05-15
- 修回日期: 2014-10-20

An assessment of arctic sea ice concentration retrieval based on “HY-2” scanning radiometer data using field observations during CHINARE-2012 and other satellite instruments

1.
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
2.
Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
3.
Finnish Meteorological Institute, Helsinki FI-00101, Finland

摘要

摘要: 本文发展了一种利用海洋2号卫星的微波扫描辐射计的亮温数据反演北极海冰密集度的算法。基于北极开阔水域、一年冰区、多年冰区的极化梯度比和谱梯度比的统计分析选取了亮温数据的连结点。两个天气过滤器生成的阈值用于减小开阔水域上水汽的影响。海洋2号辐射计数据反演的开阔水域、一年冰区和多年冰区冰密集度的数值和理论值吻合良好。来源于美国冰雪数据中心和德国不莱梅大学的两个卫星遥感产品也用来与海洋2号反演的冰密集度进行比较,海洋2号反演的北极海冰总面积与其他两个产品的计算结果一致。另外,2012年中国第五次北极考察期间的海冰航拍资料和美国冰服务中心的SAR数据也用于评估海冰密集度的计算结果。海洋2号反演的海冰密集度比航拍结果高约16%;它与SAR密集度之间的均方差与参考产品与SAR的均方差基本一致,在8.57%到12.34%之间。研究证明海洋2号卫星反演的北极海冰密集度有潜力成为一款新业务产品。
- 海洋2号 /
- 微波扫描辐射计 /
- 反演算法 /
- 海冰密集度 /
- 北极
Abstract: A retrieval algorithm of arctic sea ice concentration (SIC) based on the brightness temperature data of “HY-2” scanning microwave radiometer has been constructed. The tie points of the brightness temperature were selected based on the statistical analysis of a polarization gradient ratio and a spectral gradient ratio over open water (OW), first-year ice (FYI), and multiyear ice (MYI) in arctic. The thresholds from two weather filters were used to reduce atmospheric effects over the open ocean. SIC retrievals from the “HY-2” radiometer data for idealized OW, FYI, and MYI agreed well with theoretical values. The 2012 annual SIC was calculated and compared with two reference operational products from the National Snow and Ice Data Center (NSIDC) and the University of Bremen. The total ice-covered area yielded by the “HY-2” SIC was consistent with the results from the reference products. The assessment of SIC with the aerial photography from the fifth Chinese national arctic research expedition (CHINARE) and six synthetic aperture radar (SAR) images from the National Ice Service was carried out. The “HY-2” SIC product was 16% higher than the values derived from the aerial photography in the central arctic. The root-mean-square (RMS) values of SIC between “HY-2” and SAR were comparable with those between the reference products and SAR, varying from 8.57% to 12.34%. The “HY-2” SIC is a promising product that can be used for operational services.
- “HY-2” /
- scanning microwave radiometer /
- retrieval algorithm /
- sea ice concentration /
- arctic

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参考文献(39)

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文章访问数: 1670
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利用2012年中国北极考察现场观测数据和卫星遥感资料评估海洋2号卫星扫描辐射计数据反演北极海冰密集度的研究

doi: 10.1007/s13131-015-0632-9

计量

出版历程

An assessment of arctic sea ice concentration retrieval based on “HY-2” scanning radiometer data using field observations during CHINARE-2012 and other satellite instruments

计量

出版历程

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