摘要
利用航空遥感数字影像的解析结果和实测气象、海洋和海冰资料,定量研究了夏季融冰期北极破碎冰区的热通量,计算了海洋对大气的热贡献。结果表明,在北极夏季海冰融化时,短波辐射远远大于感热和潜热通量,是表面热通量的决定因素。海洋对大气的热贡献主要由长波辐射决定,在观测期间,海洋对大气的热贡献为38～104Wm-2。这部分热量的大小与海冰的密集度有关,当海冰密集度小于0.8时,海洋对大气的热贡献随海冰密集度的增大而减小;而当海冰密集度超过0.8以后,该热通量将随海冰密集度的增大而增大。
The heat fluxes, especially the heat contributions from ocean to atmosphere in the cracked sea ice region of the Arctic Ocean during the melting season, are quantificationally computed by using the analysis results of the airborne remote sensing digital images and observed data of atmosphere, ocean and sea ice. It is shown from the computed results that when the sea ice melts in summer the shortwave radiation much greater than the sensible and latent heat fluxes is the crucial factor of the surface heat fluxes. The heat contributions from ocean to atmosphere in the range 38 Wm-2 to 104 Wm-2 during the observation period are mostly dependent upon the longwave radiation. This part of heat flux increases with increasing sea ice concentration when the sea ice concentration is less than 0.8 and decreases when it is greater than 0.8.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2002年第3期35-43,共9页
Advances in Marine Science
基金
国家自然科学基金资助项目--北冰洋多年变化及其机理的综合研究(49879008)
