Observational Evidence of Increasing Intensity and Frequency of Deep Convective Clouds During the Indian Summer Monsoon Season

IF 4.6 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Roshny Antony, Ajil Kottayil, Viju O. John, K. Satheesan, Prince Xavier
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引用次数: 0

Abstract

In the context of recent anomalous behavior of the Indian summer monsoon, this study investigates the long-term changes in deep convective clouds and extreme rainfall during the summer monsoon periods from 2000 to 2020. Through the analysis of a long-term, climate-quality satellite data set, we provide observational evidence of significant increases in the cloud top height of deep convective clouds over the Indian subcontinent and adjacent oceanic regions. These regions also exhibit substantial increases in the frequency of occurrence of deep convective clouds. The observations indicate that the deep convective cloud top temperature decreases at approximately 4 K per decade. Our analysis reveals that these changes have accelerated markedly in the recent decade, especially post-2010. It is observed that there has been a significant increase in extreme monsoon rainfall, across the Indian subcontinent during the years 2000–2020. This emphasizes the connection between the intensification of deep convective clouds and monsoon extremes.

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印度夏季季风季节深对流云强度和频率不断增加的观测证据
本文结合近年来印度夏季风的异常行为,研究了2000 - 2020年印度夏季风期间深层对流云和极端降水的长期变化。通过对长期气候质量卫星数据集的分析,我们提供了观测证据,证明印度次大陆和邻近海洋地区的深层对流云的云顶高度显著增加。这些地区出现深层对流云的频率也显著增加。观测结果表明,深对流云顶温度以每10年约4 K的速度下降。我们的分析表明,这些变化在近十年中明显加速,特别是在2010年后。据观察,2000-2020年期间,整个印度次大陆的极端季风降雨显著增加。这强调了深层对流云的增强与季风极端事件之间的联系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Geophysical Research Letters
Geophysical Research Letters 地学-地球科学综合
CiteScore
9.00
自引率
9.60%
发文量
1588
审稿时长
2.2 months
期刊介绍: Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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