A Study of Two Propagating Heavy-Rainfall Episodes near Taiwan during SoWMEX/TiMREX IOP-8 in June 2008. Part II: Sensitivity Tests on the Roles of Synoptic Conditions and Topographic Effects
A Study of Two Propagating Heavy-Rainfall Episodes near Taiwan during SoWMEX/TiMREX IOP-8 in June 2008. Part II: Sensitivity Tests on the Roles of Synoptic Conditions and Topographic Effects
复制标题
DOI：
10.1175/mwr-d-13-00330.1
复制
发表时间：
2014-08
影响因子：
3.2
通讯作者：
Chung‐Chieh Wang;J. Hsu;G. T. Chen;Dong In Lee
中科院分区：
文献类型：
--
作者：
Chung‐Chieh Wang;J. Hsu;G. T. Chen;Dong In Lee
摘要本研究是西南季风试验/地形影响季风降雨试验（SoWMEX/TiMREX）第8次密集观测期（2008年6月8日至17日）台湾附近Hovmoller空间两次降雨事件的第2部分。第一次风暴向东移动，第二次风暴向西移动，都给台湾带来了强降雨。第一部分的目的是更好地了解事件组织和传播的机制和控制因素。在第二部分中，进一步研究了天气条件和地形效应所起的详细作用。设计了三个灵敏度测试（在2.5 km网格间距上），仅包括天气演变（SNP）的影响，以及在有/没有地形的平均背景（DIU/DNT）之上的陆海分布日变化的影响。作为基准，对照（CTL）实验成功捕获了6天的事件，并在第一部分中进行了验证。
AbstractThis study is the second of a two-part series to investigate two rainfall episodes in the Hovmoller space near Taiwan during the eighth intensive observing period (IOP-8, 12–17 June 2008) of the Southwest Monsoon Experiment/Terrain-influenced Monsoon Rainfall Experiment (SoWMEX/TiMREX). The first episode moved eastward and the second westward, and both caused heavy rainfall in Taiwan. The goal of Part I was to better understand the mechanism and controlling factors for the organization and propagation of the episodes. Here in Part II, the detailed roles played by synoptic conditions and terrain effects are further examined. Three sensitivity tests (at 2.5-km grid spacing) are designed to include only the effects of synoptic evolution (SNP), and those from land–sea distribution–diurnal variations on top of a mean background with/without topography (DIU/DNT). As the benchmark, the control (CTL) experiment captures the 6-day event successfully and is validated in Part I.In SNP, the two episodes are r...