• 主题
高级搜索  >
历史搜索 清空历史
首页> 中文期刊> 《极地科学进展：英文版》 >Investigation of the thermodynamic processes of a floe-lead system in the central Arctic during later summer

Investigation of the thermodynamic processes of a floe-lead system in the central Arctic during later summer

         
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Thermodynamic processes of a system involving a floe and a small lead in the central Arctic were investigated during the ice-camp period of the third Chinese National Arctic Research Expedition from 20 to 28 August,2008.The measurements included surface air temperatures above the floe,spectral albedo of the lead,seawater temperatures in the lead and under the ice cover,and the lateral and bottom mass balance of the floe.The surface air temperature at 1.15 m remained below 0℃throughout the observation period and sea ice had commenced its annual cycle of growth in response to autumn cooling during the study.The surface of the lead was frozen by 23 August,after which the spectral albedo of the thin-ice-covered lead in the band of 320 950 nm was 0.46 ±0.03,the seawater temperatures both in the lead and under the ice cover,as well as the vertical seawater-temperature gradient in the lead decreased gradually,and the oceanic heat under the ice was maintained at a low level approaching 0 W/m2.By the end of the measurement,the thickness of the investigated floe had reached its annual minimum,while the lateral of the floe was still in the melting phase,with a mean melting rate of 1.0 ±0.3 cm/d during the measurement,responding to an equivalent latent heat flux of 21 ±6 W/m2.The lateral melting of the floe had made a more significant contribution to the sea-ice mass balance than the surface and bottom melting in the end of August.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号