Origin of the South Pacific Convergence Zone
Origin of the South Pacific Convergence Zone
复制标题
南太平洋辐合带的起源
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
H. Loon
中科院分区：
文献类型：
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作者：
G. Kiladis;H. Storch;H. Loon
摘要利用ECMWF T21模式研究了南美洲和澳大利亚的存在对1月份南太平洋辐合带（SPCZ）的存在和方向的重要性。每个大陆都从模型中删除，并替换为海洋表面，然后将与SPCZ相关的降水和环流与永久的1月控制运行进行比较。结果表明，南美洲和赤道太平洋上升流区的存在似乎并不是至关重要的SPCZ，但澳大利亚的去除破坏了南部季风，大大削弱了西部的SPCZ。这表明，西北-东南方向的SPCZ在南部夏季更依赖于与南太平洋上空的中纬度西风带的相互作用，而不是在南半球的海表温度和陆地的分布。
Abstract The importance of the presence of South America and Australia to the existence and orientation of the South Pacific Convergence Zone (SPCZ) during January is explored using the ECMWF T21 model. Each of the continents is removed from the model and replaced with an ocean surface, and the resulting precipitation and circulation associated with the SPCZ are then compared to a perpetual January control run. Results show that the presence of South America and the equatorial Pacific upwelling zone does not appear to be crucial to the SPCZ, but that the removal of Australia destroys the southern monsoon and substantially weakens the western part of the SPCZ. This suggests that the northwest-southeast orientation of the SPCZ during southern summer is more dependent on interactions with the midlatitude westerlies over the South Pacific than on the distribution of sea surface temperature and land over the Southern Hemisphere.