Dramatic decline of observed atmospheric CO₂ and CH₄ during the COVID-19 lockdown over the Yangtze River Delta of China.

ABSTRACT: The temporal variation of greenhouse gas concentrations in China during the COVID-19 lockdown in China is analyzed in this work using high resolution measurements of near surface △CO₂, △CH₄ and △CO concentrations above the background conditions at Lin'an station (LAN), a regional background station in the Yangtze River Delta region. During the pre-lockdown observational period (IOP-1), both △CO₂ and △CH₄ exhibited a significant increasing trend relative to the 2011-2019 climatological mean. The reduction of △CO₂, △CH₄ and △CO during the lockdown observational period (IOP-2) (which also coincided with the Chinese New Year Holiday) reached up to 15.0 ppm, 14.2 ppb and 146.8 ppb, respectively, and a reduction of △CO₂

SUBMITTER: Liang M 

PROVIDER: S-EPMC9515762 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature