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Morphological Characteristics of Precipitation Areas over the Tibetan Plateau Measured by TRMM PR

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The multidimensional morphological characteristics (including scale, horizontal shape and 3D morphology) of precipitation areas over the Tibetan Plateau in summer were studied using 15 years (1998–2012) of observational data from the precipitation radar onboard the Tropical Rainfall Measuring Mission satellite. As the scale of the precipitation area increased from 20 to 150 km, the near-surface rain rate (RRav) of the precipitation area increased by up to 78％ (from ～1.12 to ～2 mm h−1). Linear precipitation areas had the lowest median RRav (～1 mm h−1 over the eastern Tibetan Plateau), whereas square-shaped precipitation areas had the highest median RRav (～1.58 mm h−1 over the eastern Tibetan Plateau). The 3D morphology was defined as the ratio of the average vertical scale to the average horizontal scale, where a large value corresponds to thin and tall, and a small value corresponds to plump and short. Thin-and-tall precipitation areas and plump-and-short precipitation areas had a greater median RRav, whereas the precipitation areas with a moderate 3D morphology had the lowest median RRav. The vertical structure of the precipitation-area reflectivity was sensitive to both size and 3D morphology, but was not sensitive to the horizontal shape. The relationship between RRav and the morphological characteristics was most significant over the southern slopes of the Tanggula Mountains and the Tibetan Plateau east of 100°E. The morphological characteristics of precipitation areas are therefore closely related to the intensity of precipitation and could potentially be used to forecast precipitation and verify numerical models.

precipitation areasmorphological characteristicsTibetan PlateauTRMM PR

Aoqi ZHANG、Yunfei FU、Shumin CHEN、Weibiao LI

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Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519000, China

Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China

School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China

This research was supported by the National Natural Science Foundation of ChinaThis research was supported by the National Natural Science Foundation of ChinaThis research was supported by the National Natural Science Foundation of ChinaThis research was supported by the National Natural Science Foundation of ChinaSecond Tibetan Plateau Sci-entific Expedition and Research (STEP) programFundamental Research Funds for the Guang-zhou Science and Technology Plan projectFundamental Research Funds for the Central Universities from Sun Yat-Sen UniversityChina Postdoctoral Science FoundationGuangdong Province Key Laboratory for Climate Change and Natural Disaster Studies

918373104167504141620104009416750432019QZKK010420190301003620lgpy192020M6729432020B1212060025

2021

大气科学进展(英文版)
中国科学院大气物理研究所

大气科学进展(英文版)

CSTPCDCSCDSCI
影响因子：0.741
ISSN：0256-1530
年,卷(期)：2021.38(4)
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