利用 INSAT-3DR 探测器数据确定印度地区气团特征的新方法

IF 1.9 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES Meteorology and Atmospheric Physics Pub Date : 2024-02-13 DOI:10.1007/s00703-023-01005-9
C. Mahesh, P. K. Dileep, Anish Kumar M. Nair, K. V. S. Namboodiri
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引用次数: 0

摘要

本文首次利用印度国家卫星系统(INSAT)-3DR 探测器数据对印度地区进行了基于卫星的气团分析。印度地区的特点是有环流和气团锋面,这对决定天气的同步变化具有重要影响。通常,气团分析是利用无线电探测仪和基于大气模型的再分析数据进行的。由于观测数据稀少和其他误差来源,这两种数据集都有其内在的局限性。本研究利用气象意义重大的卫星衍生 850 hPa 水平混合比、光学深度和等效势温进行。研究显示了印度地区不同季节不同气团的相对移动和混合情况。与位势温度相比,混合比和光学深度能很好地反映气团特征。研究提出了不同季节中相互作用的突出气团及其相对丰度。通过对不同季节 850 百帕高度的气团进行统计分析,可以估算出不同气团物理属性的平均值。从对气团的案例分析来看,在 850 hPa 上,季风前期(4 月至 5 月)会出现混合比干燥的气团。分析表明,孟加拉湾和阿拉伯海上空形成干池的原因是这一时期频繁形成反气旋。本研究凸显了卫星衍生混合比剖面在了解印度地区与气团相互作用相关的天气特征方面的潜力。
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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A new approach to air mass characterization over the Indian region using INSAT-3DR sounder data

This paper presents a first-time satellite-based air mass analysis over the Indian region using Indian National SATellite System (INSAT)-3DR sounder data. The Indian region is characterized by circulations and air mass fronts which have an influential role in deciding the synoptic weather. Usually, air mass analysis is carried out using radiosonde and atmospheric model-based reanalysis data. Both these datasets have intrinsic limitations due to sparse observations and other error sources. The present study is carried out using meteorologically significant satellite-derived 850 hPa level mixing ratio, optical depth, and equivalent potential temperature. The study elicits relative movements and mixing of different air masses during different seasons over the Indian region. The air mass features are well represented by mixing ratio and optical depth compared to potential temperature. The study brings forth prominent interacting air masses and their relative abundance during different seasons. The statistical analysis of air masses during different seasons at 850 hPa estimates the average values of physical attributes concerning different air masses. From the case analysis of air masses, at 850 hPa, a dry pool of mixing ratio is observed during the pre-monsoon (April–May) months. The analysis suggests that the reason for the formation of dry pool over Bay of Bengal and Arabian Sea is frequent anticyclonic formation during the period. The present study limelights the potential of satellite-derived mixing ratio profiles to understand the weather features associated with air mass interactions over the Indian region.

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来源期刊
Meteorology and Atmospheric Physics
Meteorology and Atmospheric Physics 地学-气象与大气科学
CiteScore
4.00
自引率
5.00%
发文量
87
审稿时长
6-12 weeks
期刊介绍: Meteorology and Atmospheric Physics accepts original research papers for publication following the recommendations of a review panel. The emphasis lies with the following topic areas: - atmospheric dynamics and general circulation; - synoptic meteorology; - weather systems in specific regions, such as the tropics, the polar caps, the oceans; - atmospheric energetics; - numerical modeling and forecasting; - physical and chemical processes in the atmosphere, including radiation, optical effects, electricity, and atmospheric turbulence and transport processes; - mathematical and statistical techniques applied to meteorological data sets Meteorology and Atmospheric Physics discusses physical and chemical processes - in both clear and cloudy atmospheres - including radiation, optical and electrical effects, precipitation and cloud microphysics.
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