北冰洋浮冰站近地层参数的观测估算

王先桥; 杨清华; 李诗民; 周明煜; 乔然; 吕洪刚

北冰洋浮冰站近地层参数的观测估算

国家海洋环境预报中心国家海洋局海洋灾害预报技术研究重点实验室,北京 100081

基金项目: 国际极地年中国行动专项(IPY2008-P0504002-03);国家自然科学基金(40930848;41006115)。

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出版历程
- 收稿日期: 2010-08-18

Estimate of surface layer parameters on drifting ice in the Arctic Ocean

Key Laboratory of Research on Marine Hazards Forecasting National Marine Environmental Forecasting Center, Beijing 100081,China

摘要

摘要: 利用2008年8月20 27日我国第3次北极考察队在85°N附近设立的冰站上进行的湍流通量、辐射观测所获取的相关资料,采用涡动相关法对夏季北冰洋浮冰下垫面的近地层参数进行了估算。结果显示,观测期间浮冰区冰雪面的平均感热、潜热和净辐射通量分别是0.2 W/m²,1.2 W/m²和9.9 W/m²,表明下垫面获得的大部分热能用于融冰和向冰下输送,只有一小部分以感热和潜热的方式加热大气;浮冰表面反射率变化范围为0.68 0.82,平均为0.76;近中性层结条件下的平均拖曳系数为1.65×10^－3,略大于中国首次和二次北极考察的估算值;CO₂通量多数情况下为负值,变化范围是－0.09 +0.06 mg/(m²·s),平均值是－0.015 mg/(m²·s),表明夏季北冰洋冰站区域是大气CO₂的汇区。
- 北冰洋 /
- 涡动相关法 /
- 湍流通量 /
- 拖曳系数 /
- CO₂通量
Abstract: Surface layer parameters over 85°N drifting ice in the Arctic Ocean in summer are estimated using eddy correlation method with observational data of August 20 28,2008 during the 3rd Chinese National Arctic Research Expedition.The results show that the average sensible heat flux,latent heat flux and net radiation are 0.2,1.2 and 9.9 W/m² respectively indicating that the majority of energy received by the underlying surface is used to melt ice and transfer downward,only a small portion for air heating by the way of sensible heat and latent heat.Surface albedo of drifting ice ranges from 0.68 to 0.82 with an average of 0.76.The drag coefficient is 1.65×10^-3 under the near neutral stratification,which is bigger than the estimates obtained by the 1st and 2nd CHINARE.Carbon dioxide flux ranges from －0.09 to +0.06 mg/(m²·s)with an average of －0.015 mg/(m²·s),which means the drifting ice area in the Arctic Ocean in summer is a sink for atmospheric CO₂.
- Arctic Ocean /
- eddy correlation /
- turbulent fluxes /
- drag coefficient /
- CO₂ sink

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