The influences of atmospheric half-yearly cycle on the sea ice extent in the Antarctic
The influences of atmospheric half-yearly cycle on the sea ice extent in the Antarctic
复制标题
大气半年循环对南极海冰范围的影响
DOI：
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复制
发表时间：
1990
期刊：
影响因子：
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通讯作者：
A. Ohmura
中科院分区：
文献类型：
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作者：
H. Enomoto;A. Ohmura
海冰和天气之间的关系是气候系统中最不为人所知的组成部分之一，但可能是高纬度气候的一个重要因素。海冰面积的年周期具有不对称发展的特点，冬季海冰面积缓慢向赤道推进，夏季迅速后退。在这项研究中，冰的范围和海冰浓度的变化的季节性不对称行为被证明是与南极周围的大气辐合线（ACL）。结果表明，具有半年周期特征的南极海冰相对位置对海冰的平均运动有很大的影响。从海冰退缩前的面密集度调查中也观察到，海冰退缩需要快速退缩。
The relationship between sea ice and weather, one of the least known components of the climatic system, could be an important factor for the climate of high latitudes. The annual cycle of the sea ice extent is characterized by a asymmetric development, with the sea ice area slowly advancing toward the equator in the winter and rapidly retreating in summer. In this study, the seasonal asymmetric behavior of ice extent and the changes in sea ice concentration are shown to be linked to the atmospheric convergence line (ACL) around Antarctica. It is found that the relative positions of the ACL characterized by the half-year cycle exert a strong influence upon the mean movement of the sea ice. It is also observed from the investigations of the areal concentration prior to the sea ice retreat is needed for a rapid retreat.