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首页> 外文期刊>Atmospheric and oceanic science letters >Observed Diurnal Cycle of Summer Precipitation over South Asia and East Asia Based on CMORPH and TRMM Satellite Data
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Observed Diurnal Cycle of Summer Precipitation over South Asia and East Asia Based on CMORPH and TRMM Satellite Data

机译：基于CMORPH和TRMM卫星资料的南亚和东亚夏季降水的日变化观测值

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The characteristics of the summer precipitation diurnal cycle over South Asia and East Asia during 2001–13 are investigated based on the high spatiotemporal resolution estimates of the CPC (Climate Prediction Center) Morphing (CMORPH) technique. The results show that summer precipitation over South Asia and East Asia possesses a remarkable diurnal cycle, with obvious regional differences. Over the coastal areas, plateau, and high mountains, summer precipitation peaks in the late afternoon; while over low altitude areas, such as valleys, basins, and inshore seas, it peaks during midnight to early morning. In addition to these general features consistent with previous studies, the high resolution CMORPH technique can depict finer regional details, such as the less coherent phase pattern over a few regions. Besides, through comparative analysis of the diurnal cycle strength and precipitation fields, the authors find that for humid areas the summer precipitation diurnal cycle is especially significant over Southeast China, the Sichuan Basin, Hainan Province, Taiwan Province, the Philippines, and Indonesia. And it is relatively weak over the south of Northeast China, central East China, Yunnan Province, the central Indian Peninsula, and most oceanic areas. Comparisons between two satellite datasets — those of the CMORPH and Tropical Rainfall Measuring Mission (TRMM) 3B42 products — are also presented. For summer precipitation and the main diurnal cycle features, the results from both products agree over most regions, except a few areas, e.g., the Tibetan Plateau.
机译：基于CPC（气候预测中心）变形（CMORPH）技术的高时空分辨率估计值，研究了2001-13年南亚和东亚夏季降水的昼夜周期特征。结果表明，南亚和东亚夏季降水具有明显的昼夜周期，区域差异明显。在沿海地区，高原和高山上，夏季降水在下午晚些时候达到峰值。而在低海拔地区（例如山谷，盆地和近海），则在午夜至清晨达到顶峰。除了这些与先前研究一致的一般特征外，高分辨率CMORPH技术还可以描绘出更精细的区域细节，例如少数区域的相干性较低。此外，通过对日循环强度和降水场的比较分析，作者发现在潮湿地区，夏季降水的日循环在中国东南部，四川盆地，海南省，台湾省，菲律宾和印度尼西亚尤为重要。在东北南部，华东中部，云南省，印度中部半岛和大多数海洋地区，它相对较弱。还介绍了CMORPH和热带雨量测量任务（TRMM）3B42产品的两个卫星数据集之间的比较。对于夏季降水和主要的昼夜周期特征，除少数地区（例如青藏高原）外，两种产品的结果在大多数地区都一致。

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