Comparison of summer Arctic sea ice surface temperatures from in situ and MODIS measurements

作     者：Na Li Bingrui Li Ruibo Lei Qun Li Na Li;Bingrui Li;Ruibo Lei;Qun Li

作者机构：Polar Research Institute of ChinaShanghai 200136China MNR Key Laboratory for Polar SciencePolar Research Institute of ChinaShanghai 200136China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2020年第39卷第9期

页      面：18-24页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：The National Natural Science Foundation of China under contract No.41606222 the National Key Research and Development Project under contract No.2016YFC1400303 

主　　题：sea ice surface temperature thermal radiometer MODIS Arctic Ocean 

摘      要：Ship-borne infrared radiometric measurements conducted during the Chinese National Arctic Research Expedition(CHINARE)in 2008,2010,2012,2014,2016 and 2017 were used for in situ validation studies of the Moderate Resolution Imaging Spectroradiometer(MODIS)sea ice surface temperature(IST)*** of sea ice were made using a KT19.85 radiometer mounted on the Chinese icebreaker Xuelong between July and September over six *** MODIS-derived ISTs from the satellites,Terra and Aqua,both show close correspondence with ISTs derived from radiometer spot measurements averaged over areas of 4 km×4 km,spanning the temperature range of 262–280 K with a±1.7 K(Aqua)and±1.6 K(Terra)*** consistency of the results over each year indicates that MODIS provides a suitable platform for remotely deriving surface temperature data when the sky is *** into factors that cause the MODIS IST bias(defined as the difference between MODIS and KT19.85 ISTs)shows that large positive bias is caused by increased coverage of leads and melt ponds,while large negative bias mostly arises from undetected *** vapor fog forming over Arctic sea ice may explain the cold bias when cloud cover is below 20%.