极地研究2018，Vol.30Issue(1)：67-76,10.DOI:10.13679/j.jdyj.20170005
基于改进FCLS算法的南极海冰密集度估算及算法比较
ESTIMATION OF ANTARCTIC SEA ICE CONCENTRATION BASED ON AN IMPROVED FCLS ALGORITHM
摘要
Abstract
Sea ice has a heat isolation effect that could influence global climate change via modification of the exchange of heat between the ocean and the atmosphere. Sea ice concentration is one of the most important indicators in polar sea ice research. To achieve high spatial resolution in estimations of multitype sea ice concentrations, this study introduced a polarization gra-dient rate and a spectral gradient rate into a fully constrained least squares (FCLS) algorithm. Accuracy was validated using Antarctic Sea Ice Processes and Climate(ASPeCt) data, and the results were compared with NASA Team2(NT2) and Arctic Radiation and Turbulence Interaction Study Sea Ice(ASI) algorithms. The root mean square error(RMSE) and bias of the im-proved FCLS algorithm throughout the year were 13.8% and -0.7%, respectively. The accuracy of the improved algorithm was found better for multiyear ice than first-year ice.关键词
南极/被动微波数据/海冰密集度/FCLSKey words
Antarctic/passive microwave data/sea ice concentration/FCLS引用本文复制引用
宋翔宇,刘婷婷,王泽民,刘艳霞..基于改进FCLS算法的南极海冰密集度估算及算法比较[J].极地研究,2018,30(1):67-76,10.基金项目
国家自然科学基金(41676179,41531069)、南北极环境综合考察与评估专项(CHINARE2016-02-04)资助 （41676179,41531069）
