在短暂的季风条件下,状云的出现及其几何和光学特性
Sanjay Kumar Mehta1, Saleem Ali2
1Atmospheric Observations and Modelling Laboratory (AOML), Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur 603203, India.
The Science of the total environment
|October 3, 2024
概括
在活跃的季风阶段,特别是印度中部,云的发生率 (POC) 较高,影响水蒸气向平流层的运输. 这项研究分析了亚洲夏季季风活跃和休息阶段的圆云特性.
科学领域:
- 大气科学 大气科学
- 云物理 云物理
- 季风气象学 季风气象学
背景情况:
- 了解状云的变化对于评估季风在平流层水蒸气运输中的作用至关重要.
- 量化地球的辐射预算需要准确了解团云的特性.
研究的目的:
- 分析亚洲夏季季风的活跃和休息阶段的圆云的空间结构和属性.
- 调查季风阶段对云出现,几何和光学属性的影响.
主要方法:
- 利用云气溶激光雷达和红外探路器卫星观测 (CALIPSO) 数据从2006年7月至2018年8月.
- 通过印度气象局的印度中部降雨数据识别了季风的活跃和中断阶段.
- 分析了云的百分比发生率 (POC),云顶/云底高度 (CTH/CBH) 和光学特性.
主要成果:
- 在活跃的季风阶段,在印度中部,阿拉伯海 (AS) 和孟加拉湾 (BoB) 上,云 (POC) 的百分比发生率高出10-30%.
- 活跃阶段显示较高的POC与增加的对流活动和热带东流相关.
- 在活跃阶段,云顶高度 (CTH) 范围大约在14-18公里之间,光学上厚薄的云层主导POC.
结论:
- 在活跃季风和休息季风阶段之间,Cirrus云的特征显著不同.
- 活跃的季风阶段增强了状云的形成和水蒸气的运输,影响了平流层和冷干燥过程.
- 这些发现有助于更好地了解季风动态及其对气候的影响.
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