Evaluation of Total Column Ozone derived from CAMS against AIRS datasets across the Indian subcontinent

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-03-20 DOI:10.1016/j.jastp.2025.106502

Sachin Budakoti

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引用次数: 0

Abstract

Present work examined the spatio-temporal variability of total column ozone (TCO) using the Copernicus Atmospheric Monitoring Service (CAMS) reanalysis dataset (2005–2020) over the Indian subcontinent. TCO data from CAMS is evaluated against the TCO from the Atmospheric Infrared Sounder (AIRS) satellite dataset using descriptive statistical analysis. CAMS TCO shows better agreement with AIRS TCO with a correlation coefficient ranging from 0.72 to 0.83 across different regions of Indian subcontinent. From the seasonal variation of TCO, an increasing shift of TCO is observed from low (Southern India) to high (North-West & Indo-Gangetic Plains) latitudinal regions during pre-monsoon and monsoon seasons ranging from 280 to 310 DU. From the seasonal evaluation of CAMS TCO against AIRS TCO a strong correlation ranges from 0.85 to 0.92 is observed during the winter (DJF) and pre-monsoon (MAM) seasons, followed by the monsoon (JJAS) and post-monsoon (ON) seasons. Monthly evaluation of CAMS TCO with AIRS TCO, shows that CAMS TCO underestimates in comparison to AIRS TCO during all the monsoon and post-monsoon months over the Indian sub-continent.

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基于印度次大陆AIRS数据集的CAMS总臭氧柱评价

本研究利用哥白尼大气监测服务（CAMS）再分析数据集（2005-2020年）研究了印度次大陆上总柱臭氧（TCO）的时空变化。CAMS的TCO数据与大气红外探测仪（AIRS）卫星数据集的TCO进行了描述性统计分析。CAMS TCO与AIRS TCO在印度次大陆不同地区的相关系数在0.72 ~ 0.83之间，表现出较好的一致性。从TCO的季节变化来看，TCO由低（南印度）向高(西北&；在季风前和季风季节，印度-恒河平原（indo - gang恒河平原）的纬度区域在280 - 310 DU之间。从CAMS TCO与AIRS TCO的季节评价来看，在冬季（DJF）和季风前（MAM）季节，CAMS TCO与AIRS TCO的相关性在0.85 ~ 0.92之间，其次是季风（JJAS）和季风后（ON）季节。CAMS TCO与AIRS TCO的月度评估表明，在印度次大陆的所有季风和季风后月份，CAMS TCO与AIRS TCO相比被低估了。

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.