摘要
利用卫星海冰密集度资料和船基海冰走航观测数据分析了2012年12月至2013年3月南极罗斯海海冰密集度、厚度和浮冰尺寸等参数的时空变化特征。12月下旬罗斯海西侧浮冰区南北向宽约1 000 km,沿雪龙船航线平均密集度在5成以上,平均海冰厚度为100 cm,平均冰上积雪厚度为16 cm,高密集度区域主要为尺寸较小的块浮冰(2—20 m)和小浮冰(20—100 m),低密集度区域主要为大尺寸浮冰(500—2 000 m)。1月和2月罗斯海大部分海域无海冰覆盖,3月海冰迅速冻结,下旬即覆盖整个罗斯海。SSMIS和AMSR2两种卫星遥感数据均能较好反映航线上的真实海冰密集度状况,AMSR2产品与观测符合更好。与1978—2012的气候平均值相比,观测区在2012年夏季冰情偏重。本文的分析结果可帮助我们了解罗斯海海冰的时空特征,为中国后续罗斯海科考提供参考。
We analyzed the distribution of sea ice in the Ross Sea during the austral summer of 2012 .Parameters inclu-ding sea ice concentration, thickness, and floe size were investigated using satellite data and ship-based observa-tions.In late December sea ice extent was about 1 000 km from north to south , average sea ice concentration was greater than 50%, average sea ice thickness was about 100 cm, and average snow depth was about 16 cm.In areas of high ice concentration, ice cakes （2-20 m） and small floes （20-100 m） predominated, while in areas of low ice concentration medium floes （100-500 m） and big floes （500-2000 m） predominated.Most of the waters＆amp;nbsp;were ice-free in January and February , but in March sea ice grew rapidly and by April the entire Ross Sea was cov-ered with ice .Sea ice concentrations derived from AMSR 2 and SSMIS were in accordance with the field observa-tions in most locations , with deviations of 15%and 20%, respectively .Therefore , AMSR2 performed better .The results of this paper provide a good reference for future CHINARE Ross Sea cruises .
出处
《极地研究》
CAS
CSCD
北大核心
2014年第3期342-351,共10页
Chinese Journal of Polar Research
基金
中国极地科学战略研究基金(20120317)
国家自然科学基金(41006115,41076128)
国家十二五极地考察专项(CHIN-ARE2014-01-01,2014-04-01)
国家十二五科技支撑计划(2011BAC03B02)资助
关键词
南极
罗斯海
夏季海冰
走航观测
Antarctica
Ross Sea
austral summer
sea ice
ship-based observations
