Research on distribution characteristics of polar sea ice by ENVISAT altimetry backscatter coefficient

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋工程环境与测绘研究中心

	Research on distribution characteristics of polar sea ice by ENVISAT altimetry backscatter coefficient
	Yang, Lei 1,2,3,5; Chang, Xiaotao 3; Guo, Jinyun 2,4; Ke, Baogui 5; Huang, Kunxue 3,6; Liu, Xiaohui 5
刊名	Cehui Xuebao/Acta Geodaetica et Cartographica Sinica
	2013
卷号	42 期号:5 页码:676-681
关键词	Geodetic satellites
ISSN号	10011595
英文摘要	The tracks of ENVISAT RA-2 altimeter can reach up to the high latitude of 81. 4°of north and south, which provides a way of active microwave sensing to monitor sea ice. A method is developed using backscatter coefficients (σ0) based on the ENVISAT satellite radar altimeter RA-2 to detect the monthly changes of polar sea ice extent and surface properties. Considering the variations of scattering characteristics of the sea water and ice surface, it is proved that a threshold of 13 dB for σ0can distinguish the sea ice cover from sea. Except for summer times, a highly correspondence between sea ice boundaries from altimeter and from radiometer released by NSIDC is presented. For lacking of satellite tracks on the central areas of Arctic, it is only can estimated the sea ice extent of Antarctic zones. And the ENVASAT altimeter gives a greater value in summer months compared to the radiometer result from NSIDC, which relates to the excellent capacity of altimeter to sensing the dispersed thin ice. In other seasons with high sea ice concentration, the difference of sea ice extent is pretty small as the mean difference of winter is just 0.17 Mkm2. The discrepancy of sea ice properties over two polar zones is also researched, and the result shows that in Arctic the sea ice surface is more rough and dry in in the winter and more wet in the summer than Antarctica. Based on this research, the ENVISAT radar altimeter can precisely detect seasonal evolution of sea ice cover and surface properties and is proved to be a useful tool in sea ice monitoring and polar exploration.
语种	中文
出版者	SinoMaps Press
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/6796]
专题	业务部门_海洋工程环境与测绘研究中心
作者单位	1.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;; 2.College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China;; 3.Satellite Surveying and Mapping Application Center of NASMG, Beijing 100830, China;; 4.Key Laboratory of Surveying and Mapping on Island and Reef of NASMG, Qingdao 266590, China;; 5.Chinese Academy of Surveying and Mapping, Beijing 100830, China;; 6.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
推荐引用方式 GB/T 7714	Yang, Lei,Chang, Xiaotao,Guo, Jinyun,et al. Research on distribution characteristics of polar sea ice by ENVISAT altimetry backscatter coefficient[J]. Cehui Xuebao/Acta Geodaetica et Cartographica Sinica,2013,42(5):676-681.
APA	Yang, Lei,Chang, Xiaotao,Guo, Jinyun,Ke, Baogui,Huang, Kunxue,&Liu, Xiaohui.(2013).Research on distribution characteristics of polar sea ice by ENVISAT altimetry backscatter coefficient.Cehui Xuebao/Acta Geodaetica et Cartographica Sinica,42(5),676-681.
MLA	Yang, Lei,et al."Research on distribution characteristics of polar sea ice by ENVISAT altimetry backscatter coefficient".Cehui Xuebao/Acta Geodaetica et Cartographica Sinica 42.5(2013):676-681.