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Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period

التفاصيل البيبلوغرافية
العنوان: Short-term reduction of regional enhancement of atmospheric CO2 in China during the first COVID-19 pandemic period
المؤلفون: Sojung Sim, Haeyoung Lee, Eunsil Oh, Sumin Kim, Philippe Ciais, Shilong Piao, John C Lin, Derek V Mallia, Sepyo Lee, Yeon-Hee Kim, Hoonyoung Park, Jeongmin Yun, Sujong Jeong
المصدر: Environmental Research Letters, Vol 17, Iss 2, p 024036 (2022)
بيانات النشر: IOP Publishing, 2022.
سنة النشر: 2022
المجموعة: LCC:Environmental technology. Sanitary engineering
LCC:Environmental sciences
LCC:Science
LCC:Physics
مصطلحات موضوعية: COVID-19, lockdown, carbon dioxide, atmospheric reduction, WRF-STILT, China, Environmental technology. Sanitary engineering, TD1-1066, Environmental sciences, GE1-350, Science, Physics, QC1-999
الوصف: Recent studies have reported a 9% decrease in global carbon emissions during the COVID-19 lockdown period; however, its impact on the variation of atmospheric CO _2 level remains under question. Using atmospheric CO _2 observed at Anmyeondo station (AMY) in South Korea, downstream of China, this study examines whether the decrease in China’s emissions due to COVID-19 can be detected from the enhancement of CO _2 mole fraction (ΔCO _2 ) relative to the background value. The Weather Research and Forecasting–Stochastic Time-Inverted Lagrangian Transport model was applied to determine when the observed mole fractions at AMY were affected by air parcels from China. Atmospheric observations at AMY showed up to a −20% (−1.92 ppm) decrease in ΔCO _2 between February and March 2020 compared to the same period in 2018 and 2019, particularly with a −34% (−3.61 ppm) decrease in March. ΔCO, which was analyzed to explore the short-term effect of emission reductions, had a decrease of −43% (−80.66 ppb) during the lockdown in China. Particularly in East China, where emissions are more concentrated than in Northeast China, ΔCO _2 and ΔCO decreased by −44% and −65%, respectively. The ΔCO/ΔCO _2 ratio (24.8 ppb ppm ^−1 ), which is the indicator of emission characteristics, did not show a significant difference before and after the COVID-19 lockdown period ( α = 0.05), suggesting that this decrease in ΔCO _2 and ΔCO was associated with emission reductions rather than changes in emission sources or combustion efficiency in China. Reduced carbon emissions due to limited human activity resulted in a decrease in the short-term regional enhancement to the observed atmospheric CO _2 .
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1748-9326
Relation: https://doaj.org/toc/1748-9326
DOI: 10.1088/1748-9326/ac507d
URL الوصول: https://doaj.org/article/0eaa29b3017f4ea1a99b167cffdad385
رقم الأكسشن: edsdoj.0eaa29b3017f4ea1a99b167cffdad385
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:17489326
DOI:10.1088/1748-9326/ac507d