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《Chinese Journal of Polar Research》 2009-03
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ARCTIC MULTIYEAR ICE CONCENTRATION RETRIEVAL BASED ON AMSR-E 89 GHz DATA

Wang Huanhuan1,Georg Heygster2,Han Shuzong1,Cheng Bin3(1College of Physical and Environmental Oceanography,Ocean University of China,Qingdao 266100,China;2Institute of Environmental Physics,University of Bremen,28359 Bremen,Germany;3Finnish Meteorological Institute,FI-00101 Helsinki,Finland)  
The 89 GHz channels of the passive microwave sensor AMSR-E have more than twice the horizontal resolution of its other lower frequency channels. The retrieval of total ice concentration based on the 89 GHz channels was well established,while retrieval of the multiyear ice concentration was little explored until now. The brightness temperatures of the AMSR-E 89 GHz channels are used to characterize their response to multiyear ice,first-year ice and open water. A simple algorithm,called Algorithm Currently (AC),has been developed and used to retrieve the total ice and multiyear ice concentrations in the Arctic in 2007. The results are compared with those from the NASA TEAM algorithm (NT). For the total ice cover and concentration,the annual variations of the ice covered areas found by the two algorithms are in good agreement. On the average,the AC produces merely 0.25 million km2 more ice cover compared with results of the NT. For multiyear ice area and concentration,however,the AC seems to overestimate considerably (as much as 1.46 million km2 in area) against results from the NT,particularly during the winter season. One possible reason would be that the AC is more sensitive to the surface temperature in the Arctic. On the other hand,the maximum (14 million km2) and minimum (4 million km2) ice cover extent in 2007 are obtained quite accurately applying our algorithm. Those results are consistent with other studies.
【Fund】: 欧盟DAMOCLES项目第6个框架计划(018509-DAMOCLES)资助
【CateGory Index】: TP79
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【Co-references】
Chinese Journal Full-text Database 2 Hits
1 JIANG Weiping1 CHU Yonghai2 LI Jiancheng2 YAO Yongshun3(1 Research Center of GNSS,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(2 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(3 Xining Institute of Hydropower and Investigation,5 Yuanshu Road,Xining 810012,China);Water Level Variation of Qinghai Lake from Altimeteric Data[J];Geomatics and Information Science of Wuhan University;2008-01
2 CAO Mei-sheng,JIN Rui(Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China);Monitoring Sea Ice Concentration Using Remote Sensing Technique[J];Remote Sensing Technology and Application;2006-03
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