Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity

The spatiotemporal statistical characteristics of warm-season deep convective systems, particularly deep convective systems initiation (DCSI), over China and its vicinity are investigated using Himawari-8 geostationary satellite measurements collected during April-September from 2016 to 2020. Based...

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Autores principales:	Yang Li, Yubao Liu, Yun Chen, Baojun Chen, Xin Zhang, Weisheng Wang, Zhuozhi Shu, Zhaoyang Huo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	deep convective systems convective initiation satellite cloud retrieval spatial distribution sub-seasonal and diurnal variation Science Q
Acceso en línea:	https://doaj.org/article/97426c7798a8432bad5a5909fb1316e4
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spelling	oai:doaj.org-article:97426c7798a8432bad5a5909fb1316e42021-11-11T18:53:01ZCharacteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity10.3390/rs132142892072-4292https://doaj.org/article/97426c7798a8432bad5a5909fb1316e42021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4289https://doaj.org/toc/2072-4292The spatiotemporal statistical characteristics of warm-season deep convective systems, particularly deep convective systems initiation (DCSI), over China and its vicinity are investigated using Himawari-8 geostationary satellite measurements collected during April-September from 2016 to 2020. Based on a satellite brightness temperature multiple-threshold convection identification and tracking method, a total of 47593 deep convective systems with lifetimes of at least 3 h were identified in the region. There are three outstanding local maxima in the region, located in the southwestern, central and eastern Tibetan Plateau and Yunnan-Guizhou Plateau, followed by a region of high convective activities in South China. Most convective systems are developed over the Tibetan Plateau, predominantly eastward-moving, while those developed in Yunnan-Guizhou Plateau and South China mostly move westward and southwestward. The DSCI occurrences become extremely active after the onset of the summer monsoon and tend to reach a maximum in July and August, with a diurnal peak at 11–13 LST in response to the enhanced solar heating and monsoon flows. Several DCSI hotspots are identified in the regions of inland mountains, tropical islands and coastal mountains during daytime, but in basins, plains and coastal areas during nighttime. DCSI over land and oceans exhibits significantly different sub-seasonal and diurnal variations. Oceanic DCSI has an ambiguous diurnal variation, although its sub-seasonal variation is similar to that over land. It is demonstrated that the high spatiotemporal resolution satellite dataset provides rich information for understanding the convective systems over China and vicinity, particularly the complex terrain and oceans where radar observations are sparse or none, which will help to improve the convective systems and initiation nowcasting.Yang LiYubao LiuYun ChenBaojun ChenXin ZhangWeisheng WangZhuozhi ShuZhaoyang HuoMDPI AGarticledeep convective systemsconvective initiationsatellite cloud retrievalspatial distributionsub-seasonal and diurnal variationScienceQENRemote Sensing, Vol 13, Iss 4289, p 4289 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	deep convective systems convective initiation satellite cloud retrieval spatial distribution sub-seasonal and diurnal variation Science Q
spellingShingle	deep convective systems convective initiation satellite cloud retrieval spatial distribution sub-seasonal and diurnal variation Science Q Yang Li Yubao Liu Yun Chen Baojun Chen Xin Zhang Weisheng Wang Zhuozhi Shu Zhaoyang Huo Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity
description	The spatiotemporal statistical characteristics of warm-season deep convective systems, particularly deep convective systems initiation (DCSI), over China and its vicinity are investigated using Himawari-8 geostationary satellite measurements collected during April-September from 2016 to 2020. Based on a satellite brightness temperature multiple-threshold convection identification and tracking method, a total of 47593 deep convective systems with lifetimes of at least 3 h were identified in the region. There are three outstanding local maxima in the region, located in the southwestern, central and eastern Tibetan Plateau and Yunnan-Guizhou Plateau, followed by a region of high convective activities in South China. Most convective systems are developed over the Tibetan Plateau, predominantly eastward-moving, while those developed in Yunnan-Guizhou Plateau and South China mostly move westward and southwestward. The DSCI occurrences become extremely active after the onset of the summer monsoon and tend to reach a maximum in July and August, with a diurnal peak at 11–13 LST in response to the enhanced solar heating and monsoon flows. Several DCSI hotspots are identified in the regions of inland mountains, tropical islands and coastal mountains during daytime, but in basins, plains and coastal areas during nighttime. DCSI over land and oceans exhibits significantly different sub-seasonal and diurnal variations. Oceanic DCSI has an ambiguous diurnal variation, although its sub-seasonal variation is similar to that over land. It is demonstrated that the high spatiotemporal resolution satellite dataset provides rich information for understanding the convective systems over China and vicinity, particularly the complex terrain and oceans where radar observations are sparse or none, which will help to improve the convective systems and initiation nowcasting.
format	article
author	Yang Li Yubao Liu Yun Chen Baojun Chen Xin Zhang Weisheng Wang Zhuozhi Shu Zhaoyang Huo
author_facet	Yang Li Yubao Liu Yun Chen Baojun Chen Xin Zhang Weisheng Wang Zhuozhi Shu Zhaoyang Huo
author_sort	Yang Li
title	Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity
title_short	Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity
title_full	Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity
title_fullStr	Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity
title_full_unstemmed	Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity
title_sort	characteristics of deep convective systems and initiation during warm seasons over china and its vicinity
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/97426c7798a8432bad5a5909fb1316e4
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_version_	1718431714796109824

Characteristics of Deep Convective Systems and Initiation during Warm Seasons over China and Its Vicinity

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