Latitudinal fluctuation in global concentration of CO2 and CH4 from shortwave infrared spectral observation by GOSAT during COVID-19  

作　　者：Laxmi Kant Sharma Rajani Kant Verma 

机构地区：[1]Department of Environmental Science,School of Earth Sciences,Central University of Rajasthan,Ajmer,India

出　　处：《International Journal of Digital Earth》2021年第12期1882-1896,共15页国际数字地球学报（英文）

摘　　要：Various countries have rapidly implemented strict actions to slow the blowout of COVID-19.Many events were dis-regarded,and anthropogenic activities such as industrial and transport systems were at a stoppage.Many countries were on lockdown,including the largest emitters of carbon dioxide.Due to these lockdowns,anthropogenic activities have been reduced and reported that air quality improves at a regional scale in many countries,including India.Therefore,the current study using Greenhouse Gases Observing Satellite(GOSAT/IBUKI)datasets to monitor the fluctuation of the average global concentration of dry mole fractions of atmospheric Methane(CH_(4))and Carbon Dioxide(CO_(2))during these pandemic lockdowns from January to June 2020.Outputs emphasize no significant reduction in the average concentration of dry mole fractions of atmospheric CH_(4) over the globe,but a minor reduction was observed in global CO_(2) engagement.The average concentration of both gases compares at each ten-degree latitude.The study reveals that,against the regional breakdowns,these short time lockdowns are not enough to control the concentration of these greenhouse gases at a larger scale,such as 10°latitude and globally,except for a minor reduction in CO_(2) concentration.

关 键 词：Lockdown PANDEMIC air quality greenhouse gas METHANE carbon dioxide 

分 类 号：O62[理学—有机化学]