Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.08.004 |
Assessment of IMERG precipitation over Taiwan at multiple timescales | |
Huang, Wan-Ru; Chang, Ya-Hui; Liu, Pin-Yi | |
2018-12-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 214页码:239-249 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan |
英文摘要 | Since March 2014, the Global Precipitation Measurement (GPM) Integrated Multi-satellitE Retrievals for GPM (IMERG) has provided satellite precipitation estimates across the globe. Using gridded surface precipitation data derived from local rain gauges as a reference, this study evaluated the performance of IMERG in depicting the spatial-temporal characteristics of precipitation variations over Taiwan at multiple (including annual, seasonal, intraseasonal, diurnal and semidiurnal) timescales. The analysis focused on the period of March 2014-February 2017. Our results show that, quantitatively, IMERG underestimated the magnitude of precipitation over most of Taiwan for all the examined timescales; spatially, the bias in variability was larger over the mountainous areas than over the plain areas; temporally, the bias in variability was larger in the warm seasons than in the cold seasons. Despite the magnitude differences, IMERG was capable of qualitatively depicting several distinct features of Taiwan precipitation changes, listed as follows: (1) a bimodal pattern, with a peak in May and another peak in September, in the annual evolution of precipitation area averaged over Taiwan; (2) a seasonal counterclockwise rotation feature, with the precipitation maximum located over northern Taiwan in the winter, over northwestern Taiwan in the spring, over southwest Taiwan in the summer and over eastern Taiwan in the autumn; (3) a 10-to-35-day intraseasonal oscillation feature, with a transition of variations from smaller amplitudes in the cold seasons to larger amplitudes in the warm seasons, occurring around mid-May (i.e., the so-called Meiyu onset in Taiwan); and (4) a roughly out-of-phase feature, with a morning precipitation maximum in the winter and an afternoon precipitation maximum in the other seasons, for the diurnal evolution of the area-averaged precipitation over Taiwan. In addition, IMERG was capable of qualitatively depicting the phase evolution of semidiurnal precipitation over Taiwan in most seasons, except for the winter season. These findings highlight the potential use of IMERG to qualitatively represent changes in precipitation over Taiwan at multiple timescales. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445990400019 |
WOS关键词 | SUMMER MONSOON RAINFALL ; HIGH-RESOLUTION SATELLITE ; INTRASEASONAL OSCILLATION ; SEASONAL-VARIATION ; PASSIVE MICROWAVE ; TRMM OBSERVATIONS ; SOUTH CHINA ; GPM IMERG ; MEI-YU ; PRODUCTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/38202 |
专题 | 地球科学 |
作者单位 | Natl Taiwan Normal Univ, Dept Earth Sci, 88,Sec 4,Tingchou Rd, Taipei 11677, Taiwan |
推荐引用方式 GB/T 7714 | Huang, Wan-Ru,Chang, Ya-Hui,Liu, Pin-Yi. Assessment of IMERG precipitation over Taiwan at multiple timescales[J]. ATMOSPHERIC RESEARCH,2018,214:239-249. |
APA | Huang, Wan-Ru,Chang, Ya-Hui,&Liu, Pin-Yi.(2018).Assessment of IMERG precipitation over Taiwan at multiple timescales.ATMOSPHERIC RESEARCH,214,239-249. |
MLA | Huang, Wan-Ru,et al."Assessment of IMERG precipitation over Taiwan at multiple timescales".ATMOSPHERIC RESEARCH 214(2018):239-249. |
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