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isolated deep convections over the Tibetan Plateau in the rainy season during 2001–2020

Atmospheric and Oceanic Science Letters 2024年第5期17卷 16-21页

作者： Ying Na Chaofan Li Riyu Lu School of Atmospheric Science and Remote Sensing Wuxi UniversityWuxiChina Key Laboratory of Ecosystem Carbon Source and Sink China Meteorological Administration(ECSS-CMA)Wuxi UniversityWuxiChina Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

The Tibetan Plateau(TP)is a prevalent region for convection systems due to its unique thermodynamic *** study investigated isolated deep convections(IDCs),which have a smaller spatial and temporal size than mesoscale convective systems(MCSs),over the TP in the rainy season(June-September)during 2001–*** authors used satellite precipitation and brightness temperature observations from the Global Precipitation Measurement *** show that IDCs mainly concentrate over the southern *** IDC number per rainy season decreases from around 140 over the southern TP to around 10 over the northern TP,with an average *** initiation time of IDCs exhibits an obvious diurnal cycle,with the peak at 1400–1500 LST and the valley at 0900–1000 *** IDCs last less than five hours and more than half appear for only one *** generally have a cold cloud area of 7422.9 km^(2),containing a precipitation area of approximately 65%.The larger the IDC,the larger the fraction of intense precipitation it *** contribute approximately 20%–30%to total precipitation and approximately 30%–40%to extreme precipitation over the TP,with a larger percentage in July and August than in June and *** terms of spatial distribution,IDCs contribute more to both total precipitation and extreme precipitation over the TP compared to the surrounding plain *** over the TP account for a larger fraction than MCSs,indicating the important role of IDCs over the region.

关键词： isolated deep convection Tibetan plateau Climatological characteristics Precipitation contribution Extreme precipitation

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