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

被引：0

作者：

Ying Na ^{[1
,2
]}

Chaofan Li ^{[3
,4
]}

Riyu Lu ^{[5
,4
]}

机构：

[1] School of Atmospheric Science and Remote Sensing, Wuxi University

[2] Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration(ECSS-CMA), Wuxi University

[3] Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences

[4] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences

[5] State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of

来源：

Atmospheric and Oceanic Science Letters | 2024年 / 17卷 / 05期

关键词：

孤立深对流; 青藏高原; 气候特征; 降水贡献; 极端降水;

D O I：

暂无

中图分类号：

P426.6 [降水];

学科分类号：

摘要：

本文利用卫星观测资料,研究了2001–2020年雨季（6–9月）青藏高原上孤立深对流（Isolated deep convections,IDCs）的气候特征. IDCs定义为比中尺度对流系统（Mesoscale convective systems, MCSs）时空尺度小的对流.结果显示,每年雨季青藏高原上平均的IDC数量为54.2个,主要分布在高原的南部. IDCs的初始时刻呈现明显的日循环,在下午14–15时为峰值,在上午9–10时为谷值.大部分IDCs持续时间在5小时以内,超过一半的IDCs仅持续1小时.IDCs的冷云平均面积约为7422.9km2,其中包含65%的降水面积. IDC面积越大,包含的强降水范围也越大. IDCs对青藏高原总降水的贡献约为20%–30%,对极端降水贡献约为30%–40%,在7月和8月的占比大于6月和9月.在空间分布方面,青藏高原上IDCs对总降水和极端降水的贡献大于周围平原地区.青藏高原上IDCs对降水的贡献大于MCSs,表明IDCs在该地区起着重要作用.

引用

页码：18 / 23

页数：6

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