| 热带西太平洋海温异常对东北亚阻塞形势影响的数值模拟 |
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| 引用本文： | 陆日宇,黄荣辉.热带西太平洋海温异常对东北亚阻塞形势影响的数值模拟[J].气候与环境研究,1996,1(2):134-142. |
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| 作者姓名： | 陆日宇 黄荣辉 |
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| 作者单位： | 中国科学院大气物理研究所 |
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| 基金项目： | 中国科学院重大应用项目 |
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| 摘 要： | 本文利用ＩＡＰ－ＡＧＣＭ模拟研究了实测海温异常和热带西太平洋假想海温异常对夏季东亚地区环流异常的影响，并与观测结果进行了比较，籍此间接地研究了海温异常对东北亚阻塞形势的影响。首先，利用１９８０年实测海温异常，分三种试验（全球海温异常试验、热带海温异常试验、热带外海温异常试验）模拟了该年７月和８月的大气环流异常，指出海温异常是致使东北亚阻塞形势得以形成和维持的一个重要原因，同时也表明在对东亚大气环流异常型的影响方面，热带海温异常比热带经温异常更为重要。此外，我们还模拟研究了热带西太平洋的假想海温异常对东亚大气环流异常的影响，表明了热带西太平浃海温负异常对东北亚阻塞形势形成和维持有着重要作用
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| 关 键 词： | 东北亚阻塞形势 海温异常 环流异常型 |
Effects of the SSTA in the Tropical Western Pacific on the Blocking Highs over Northeastern Asia |
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| Lu Riyu and Huang Ronghui.Effects of the SSTA in the Tropical Western Pacific on the Blocking Highs over Northeastern Asia[J].Climatic and Environmental Research,1996,1(2):134-142. |
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| Authors: | Lu Riyu and Huang Ronghui |
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| Abstract: | The effects of the observed sea surface temperature anomalies (SSTA) and the idealized SSTA in the tropical western Pacific on the atmospheric circulation anomaly during summer over East Asia were simulated by the IAP-AGCM. By comparing the simulated results to the observed results, we studied indirectly the influence of SSTA on the blocking situations over northeastern Asia. At first, by the use of the observed SSTA in 1980, we simulated the atmospheric circulation anomaly in the July and August of the year, through three anomalous runs (Global SSTA run, Tropical SSTA run, and Extratropical SSTA run). It was shown that the SSTA influence greatly the formation and maintenance of the blocking highs over northeastern Asia. It was also shown that the tropical SSTA play a more important role in influencing the atmospheric circulation anomaly than the extratropical SSTA. We also simulated the effects of the idealized SSTA in the tropical western Pacific on the atmospheric circulation anomaly over East Asia. The simulated results showed that the negative SSTA in the tropical western Pacific are beneficial to the formation and maintenance of the blocking highs over northeastern Asia. |
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| Keywords: | blocking highs SSTA circulation anomaly |
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