海水物质平衡浮标对北冰洋中心区海冰温度与物质平衡的观测

李娜; 刘骥平; 张占海; 崔琳; 雷瑞波

海水物质平衡浮标对北冰洋中心区海冰温度与物质平衡的观测

1.
中国极地研究中心,上海 200136;复旦大学通信科学与工程系,上海 200433
2.
国家海洋局极地科学重点实验室,上海 200136
3.
国家海洋技术中心,天津 300111
4.
中国极地研究中心,上海 200136;国家海洋局极地科学重点实验室,上海 200136

基金项目: 国家"八六三"计划课题(2008AA121701);国家自然科学基金重点项目(40930848);中国科学院"百人计划";国家重点基础研究发展计划(2011CB309704);中挪AMORA合作计划(1611/201)。

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出版历程
- 收稿日期: 2010-08-22

Sea ice temperature and mass balance measurements from ice mass-balance buoy in the central Arctic Ocean

1.
Polar Research Institute of China, Shanghai 200136, China;Department of Communication Science and Engineering, Fudan University, Shanghai 200433, China
2.
Key Laboratory of State Oceanic Administration for Polar Science, Shanghai 200136, China
3.
National Ocean Technology Center, State Oceanic Administration, Tianjin 300111, China
4.
Polar Research Institute of China, Shanghai 200136, China;Key Laboratory of State Oceanic Administration for Polar Science, Shanghai 200136, China

摘要

摘要: 利用中国第3次北极科学考察所布放海冰物质平衡浮标(Ice Mass-Balance buoy, IMB)的观测数据,分析了北冰洋中心区多年冰2008年8月—2009年7月温度与物质平衡的变化特征。结果表明,冰温廓线呈现明显的季节变化,秋季降温过程从海冰表面开始向冰体内部传播。海冰底部的生长/消融率受海水温度控制,随水温的降低,在2月初达到的最大值为1.7 cm/d;在2008年10月中旬至2009年6月下旬为海冰的生长期内,海冰底部平均生长率为0.6 cm/d,海冰底部厚度增长量为160.3 cm;海冰底部的消融较海冰表面约有1个月的滞后。分析海面风场对海冰漂移的影响显示,海冰漂移速率约为风速的2.13%。
- 北冰洋 /
- 海冰物质平衡 /
- 中国第3次北极科学考察 /
- 浮标
Abstract: As the integrator of both the surface heat budget and the ocean heat flux, the mass balance of sea ice is a key climate-change indicator. A set of IMB (Ice Mass-balance Buoy) was deployed in the central Arctic Ocean during the 3rd arctic research expedition of China.Analysis of 11 months’data from August 2008 to July 2009 shows that aseasonal cycle is obvious on the temperature of sea ice. With the air temperature decreases, a cold front propagates down through the ice in the fall. The growth/ablation rate of sea ice bottom is mainly controled by water temperature below, and reaches its maximum 1.7 cm/d in the early February. Growth season of sea ice bottom lasts from the middle October in 2008 to the end June in 2009, with an average bottom growth rate of 0.6 cm/d and total sea ice growth of 160.3 cm.Bottom melting begins in the early July, being one-month lag when comparing with surface melting. Correlation analysis between the daily ice drift and the 10m wind gives a correlation coefficient of 0.14(99% significance), ice moves at 2.13% of the wind speed.
- Arctic Ocean /
- sea ice mass balance /
- CHINARE-2008 /
- buoy

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参考文献(16)

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