The critical role of Indian summer monsoon on the remote forcing between Indian and Northwest Pacific during El Niño decaying year
The critical role of Indian summer monsoon on the remote forcing between Indian and Northwest Pacific during El Niño decaying year
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DOI：
10.1007/s11430-012-4569-y
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
Haibo Hu;Xiaoyuan Hong;Y. Zhang;Xiuqun Yang;Jie He
中科院分区：
文献类型：
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作者：
Haibo Hu;Xiaoyuan Hong;Y. Zhang;Xiuqun Yang;Jie He
最近的研究发现，印度洋盆地变暖与厄尔尼诺衰退年异常的西北太平洋反气旋（ANPWA）之间存在联系。本文通过观测和数值模拟的方法，对这种联系的必要条件进行了研究。印度洋海面风场的季节转换对印度洋海盆变暖的气候效应至关重要。当南亚夏季风达到高峰时，背景风成为盆地变暖的有利因素，从而影响西北太平洋的气候。通过Kelvin波和Ekman散度，印度洋暖海表温度（SST）异常以东的低层大气存在风异常，并在整个厄尔尼诺衰减夏季加强和维持ANWPA。这种影响在东亚夏季风年际变化中起着重要作用。
Recent studies have found a connection between Indian Ocean Basin Warming and the anomalous Northwest Pacific Anticyclone (ANPWA) during El Niño decaying year. This study focuses on the necessary condition for this connection by using observation and numerical simulation. The seasonal transition of the Indian Ocean sea surface wind is critical to the climatic effect of Indian Ocean Basin Warming. When the South Asian Summer Monsoon reaches its peak, the background wind becomes desirable for basin warming, which then affects the climate in the Northwest Pacific. Via the Kelvin waves and Ekman divergence, the wind anomalies exist in the lower atmosphere east of the Indian Ocean warm Sea Surface Temperature (SST) anomalies, and intensify and sustain the ANWPA throughout the El Niño decaying summer. This impact plays an important role in the inter-annual variability of the East Asian Summer Monsoon.