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Interdecadal Change of the Northward Jump Time of the Western Pacific Subtropical High in Association with the Pacific Decadal Oscillation

ISSN号：2095-6037
期刊名称：《气象学报：英文版》
时间：0
分类：P732[天文地球—海洋科学] P467[天文地球—大气科学及气象学]
作者机构：[1]College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, [2]Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing 100081
相关基金：Supported by the National Basic Research and Development（973）Program of China（2013CB430204 and 2012CB955902）; China Meteorological Administration Special Public Welfare Research Fund（GYHY201306021）; National Natural Science Foundation of China（40930952,41105070,and 41375078）.Acknowledgments. We thank two anonymous reviewers for their valuable comments and suggestions

作者：叶天舒[1], 申茜[1], 王阔[1], 张志森[1], 赵俊虎[1,2]

关键词：太平洋年代际振荡, 西太平洋副热带高压, 时间表, 西太平洋副高, 年代际变化, 协会, 全球气候变暖, ENSO, northward jump of WPSH, interdecadal change, summer precipitation, Pacific decadal oscillation （PDO）

中文摘要：

在这份报纸，向北方跳西方的和平的副热带的高度(WPSH ) 的时间在 interdecadal timescale 上被定义并且分析。在全球温暖下面，重要 interdecadal 变化向北方发生在 WPSH 的时间的结果表演跳。从 1951 ～ 2012，时间向北方首先 WPSH 跳变化了从对连续地早连续地迟了，与发生在 1980 的转变。时间第二向北方 WPSH 表演跳一个类似的变化，与发生在 1978 的转变。在这研究，我们由使用时间提供一个新观点向北方 WPSH 跳在 1970 年代的结束向 south-abundant-north-below-average 从 north-abundant-south-below-average 解释东方中国夏天降雨模式变化。在时间的 interdecadal 变化向北方 WPSH 跳不仅与夏天降雨模式，而且与和平的十的摆动(PDO ) 相应。WPSH 向北方跳相应于寒冷的时间(温暖) PDO 的阶段是早的(迟了) 。尽管 PDO 和 El Ni ?o 南部的摆动(ENSO ) 两个极大地影响时间二向北方 WPSH 跳， PDO 效果到约 12 个月在 ENSO 前被注意。在排除 ENSO 影响以后，我们为 PDO 的不同阶段导出合成垂直大气的循环。结果在寒冷期间显示出那(温暖) PDO 的阶段，在 200， 500，和 850 hPa 的大气的发行量都贡献一更早(以后) 向北方 WPSH 跳。

英文摘要：

In this paper, the northward jump time of the western Pacific subtropical high（WPSH） is defined and analyzed on the interdecadal timescale. The results show that under global warming, significant interdecadal changes have occurred in the time of the WPSH northward jumps. From 1951 to 2012, the time of the first northward jump of WPSH has changed from ＂continuously early＂ to ＂continuously late＂, with the transition occurring in 1980. The time of the second northward jump of WPSH shows a similar change, with the transition occurring in 1978. In this study, we offer a new perspective by using the time of the northward jump of WPSH to explain the eastern China summer rainfall pattern change from ＂north-abundant-southbelow-average＂ to ＂south-abundant-north-below-average＂ at the end of the 1970 s. The interdecadal change in the time of the northward jump of WPSH corresponds not only with the summer rainfall pattern, but also with the Pacific decadal oscillation（PDO）. The WPSH northward jump time corresponding to the cold（warm） phase of the PDO is early（late）. Although the PDO and the El Nino–Southern Oscillation（ENSO）both greatly influence the time of the two northward jumps of WPSH, the PDO＇s effect is noticed before the ENSO＇s by approximately 1–2 months. After excluding the ENSO influence, we derive composite vertical atmospheric circulation for different phases of the PDO. The results show that during the cold（warm）phase of the PDO, the atmospheric circulations at 200, 500, and 850 h Pa all contribute to an earlier（later）northward jump of the WPSH.

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