极地研究

极地研究 ›› 2001, Vol. 12 ›› Issue (2-English): 119-132.

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Role of sea ice in air-sea exchange and its relation to sea fog

 Xie Simei, Bao Chenglan, Jiang Dezhong and Zou Bin   

  1. National Research Center for Marine Envrionment Forecasts, Beijing 100081, China
  • 出版日期:1951-06-30 发布日期:1951-06-30
  • 通讯作者: Xie Simei

Role of sea ice in air-sea exchange and its relation to sea fog

 Xie Simei, Bao Chenglan, Jiang Dezhong and Zou Bin   

  1. National Research Center for Marine Envrionment Forecasts, Beijing 100081, China
  • Online:1951-06-30 Published:1951-06-30
  • Contact: Xie Simei

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摘要：

Synchronous or quasi-synchronous stereoscopic sea-ice-air comprehensive observation was conducted during the First China Arctic Expedition in summer of 1999. Based on these data, the role of sea ice in sea-air exchange was studied. The study shows that the kinds, distribution and thickness of sea ice and their variation significantly influence the air-sea heat exchange. In floating ice area, the heat momentum transferred from ocean to atmosphere is in form of latent heat; latent heat flux is closely related to floating ice concentration; if floating ice is less, the heat flux would be larger. Latent heat flux is about 21-23.6 W·m-2, which is greater than sensible heat flux. On ice field or giant floating ice, heat momentum transferred from atmosphere to sea ice or snow surface is in form of sensible heat. In the floating ice area or polynya, sea-air exchange is the most active, and also the most sensible for climate. Also this area is the most important condition for the creation of Arctic vapor fog. The heat exchange of a large-scale vapor fog process of about 500 000 km2 on Aug. 21-22,1999 was calculated; the heat momentum transferred from ocean to air was about 14.8×109 kW. There are various kinds of sea fog, radiation fog, vapor fog and advection fog, forming in the Arctic Ocean in summer. One important cause is the existence of sea ice and its resultant complexity of both underlying surface and sea-air exchange.

关键词: Arctic sea ice, ice-air-sea interaction, sea-air exchange, Arctic sea fog

Abstract:

Synchronous or quasi-synchronous stereoscopic sea-ice-air comprehensive observation was conducted during the First China Arctic Expedition in summer of 1999. Based on these data, the role of sea ice in sea-air exchange was studied. The study shows that the kinds, distribution and thickness of sea ice and their variation significantly influence the air-sea heat exchange. In floating ice area, the heat momentum transferred from ocean to atmosphere is in form of latent heat; latent heat flux is closely related to floating ice concentration; if floating ice is less, the heat flux would be larger. Latent heat flux is about 21-23.6 W·m-2, which is greater than sensible heat flux. On ice field or giant floating ice, heat momentum transferred from atmosphere to sea ice or snow surface is in form of sensible heat. In the floating ice area or polynya, sea-air exchange is the most active, and also the most sensible for climate. Also this area is the most important condition for the creation of Arctic vapor fog. The heat exchange of a large-scale vapor fog process of about 500 000 km2 on Aug. 21-22,1999 was calculated; the heat momentum transferred from ocean to air was about 14.8×109 kW. There are various kinds of sea fog, radiation fog, vapor fog and advection fog, forming in the Arctic Ocean in summer. One important cause is the existence of sea ice and its resultant complexity of both underlying surface and sea-air exchange.

Key words: Arctic sea ice, ice-air-sea interaction, sea-air exchange, Arctic sea fog