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在过去十年 (2014-2023) 中,使用INSAT-3D在印度次大陆上的云覆盖变化

Shivali Verma¹, M V Ramana¹, Rabindrakumar Nayak¹

¹Earth and Climate Sciences Area, National Remote Sensing Centre (NRSC), Hyderabad, Telangana, India.

The Science of the total environment

|September 13, 2025

概括

长期的卫星数据显示,印度陆地和海洋上的云层覆盖率不断增加,但平均而言,总体上略有下降. 白天的云层正在减少,而夜间的云层正在增加,影响气候变化.

科学领域:

气候科学气候科学
大气科学大气科学
遥感遥感遥感遥感

背景情况:

了解长期云层覆盖变化对于评估气候变化影响至关重要.
印度的地球静止卫星INSAT-3D为捕捉这些变化提供了必要的持续监测.
关于长期云趋势及其对印度次大陆的区域影响,存在一个知识差距.

研究的目的:

通过使用十年评估,调查印度地区云层部分的空间和时间趋势.
解决了解长期云动态及其区域影响的知识差距.
分析每日,白天和夜间云层部分的趋势.

主要方法:

利用印度地球静止卫星INSAT-3D的十年 (2014-2023) 云层覆盖率数据.
与地面All Sky Imager观测结果相对应的INSAT-3D云层覆盖率得到验证.
分析了陆地和海洋地区的年度每日平均,白天和夜间云层覆盖率趋势.

主要成果:

INSAT-3D数据完全符合地面对阴天的观测,误差为3%.
每年平均每日云层覆盖率在陆地上增加了0.3%,在邻近的海洋上增加了0.2%-0.6%.
当在印度次大陆和周边海洋中平均计算时,观察到总体下降率为-0.05%-1年.
白天的云覆盖率下降了-3%-1年,而夜间的云覆盖率增加了1.5%-1年.

结论:

该研究强调了印度次大陆和周边海洋云层趋势的显著区域差异.
云层中不对称的白天周期表明可能对云层辐射效应和表面温度产生影响.
基于卫星的持续云监测对于了解气候变化和气候变化对该地区的影响至关重要.

关键词:

所有的天空影像仪.云层覆盖云层覆盖云层覆盖十几十年的时间.地静态是指地静态的美国INSAT-3D卫星

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