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首页> 外文期刊>Atmospheric research >Association of Taiwan's October rainfall patterns with large-scale oceanic and atmospheric phenomena
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Association of Taiwan's October rainfall patterns with large-scale oceanic and atmospheric phenomena

机译：台湾十月降雨模式与大规模海洋和大气现象的关联

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摘要

The variability of the amount of October rainfall in Taiwan is the highest among all seasons. The October rainfall in Taiwan is attributable to interactions between the northeasterly monsoon and typhoons and their interaction with Taiwan's Central Mountain Range. This study applied long-term gridded rainfall data for defining the major rainfall pattern for October in Taiwan. The empirical orthogonal function Model 1 (80%) of the October rainfall and El Nino Southern Oscillation (ENSO) index exhibited a significant out-of-phase coherence in a 24 year period band. This is because an easterly flow on the northern edge of an anomalous low-level cyclonic circulation over the South China Sea during a La Nina developing stage increased the occurrence of an autumn cold front and enhanced the northeasterly monsoon toward northern Taiwan. In addition, a southerly flow on the eastern edge of the anomalous cyclone increased the moisture transport from the tropical Pacific toward Taiwan. The warmer sea surface temperature in the South China Sea, Kuroshio, and the subtropical western Pacific, which may have been induced by an ENSO warm phase peak in the preceding winter, promoted the formation of the anomalous low-level cyclonic circulation. (C) 2016 Elsevier B.V. All rights reserved.
机译：台湾十月份降雨量的变化率是所有季节中最高的。台湾10月份的降雨归因于东北季风和台风之间的相互作用以及它们与台湾中央山脉的相互作用。这项研究运用长期网格化降雨数据来确定台湾10月的主要降雨模式。经验正交函数模型1（80％）的十月降雨量和厄尔尼诺南部涛动（ENSO）指数在24年周期内显示出明显的异相干。这是因为在拉尼娜发育阶段，南海上空异常低空气旋环流北缘的东风增加了秋季冷锋的发生，并增强了向台湾北部的东北风。另外，异常气旋东边缘的南风增加了水分从热带太平洋向台湾的输送。南海，黑潮和亚热带西太平洋的海表温度升高可能是由前一个冬季的ENSO暖期峰诱发的，从而促进了异常低空气旋环流的形成。 （C）2016 Elsevier B.V.保留所有权利。

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