A Review on the Western North Pacific Monsoon: Synoptic-to-Interannual Variabilities
A Review on the Western North Pacific Monsoon: Synoptic-to-Interannual Variabilities
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DOI：
10.3319/tao.2005.16.2.285(a
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发表时间：
2005-06
影响因子：
0.8
通讯作者：
Tim Li;Bin Wang
中科院分区：
文献类型：
--
作者：
Tim Li;Bin Wang
本文综述了西北太平洋季风在不同时间尺度上的观测结构和演变特征，包括其年周期、天气波活动、季节内振荡和年际变化。在天气尺度（2-10天）上，夏季天气波和赤道对称和反对称模态经常出现，它们可能是触发热带气旋生成的原因。在季节内尺度上，在双周（10-20天）和低频（20-70天）波段有明显的谱峰。在年际时间尺度上，季风受厄尔尼诺-南方涛动（ENSO）的调制，并可能反馈给ENSO。本文综述了引起天气尺度、季节内和年际变化的物理机制，以及这些运动之间的多尺度相互作用。印度季风和西北太平洋季风之间的比较，在降水和环流模式，占主导地位的时间尺度，和全球遥相关的差异也说明了。最后讨论了与西北太平洋季风变化有关的一些问题。
In this paper we review the observed structure and evolution characteristics of the western North Pacific monsoon on various time scales, including its annual cycle, synoptic wave activity, intraseasonal oscillations, and interannual variabilities. On the synoptic (2-10-day) timescale, summertime synoptic waves and equatorial symmetric and anti-symmetric modes are often observed, and they may be responsible for triggering tropical cyclone genesis. On the intraseasonal scale, there are significant spectrum peaks at bi-weekly (10-20-day) and lower-frequency (20-70-day) bands. On the interannual time scale, the monsoon is greatly modulated by and possibly feeds back to the El Nino-Southern Oscillation (ENSO). The paper reviews our current understanding of physical mechanisms that give rise to the synoptic-scale, intraseasonal and interannual variabilities, and multi- scale interactions among these motions. The comparison between the Indian monsoon and the western North Pacific monsoons in terms of their differences in precipitation and circulation patterns, dominant time scales, and global teleconnection is also illustrated. Finally we discuss some remaining issues related to the western North Pacific monsoon variabilities.