Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091265 |
Global Significant Changes in Formaldehyde (HCHO) Columns Observed from Space at the Early Stage of the COVID‐19 Pandemic | |
Wenfu Sun; Lei Zhu; Isabelle De Smedt; Bin Bai; Dongchuan Pu; Yuyang Chen; Lei Shu; Dakang Wang; Tzung‐; May Fu; Xiaofei Wang; Xin Yang | |
2021-02-01 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Satellite HCHO data are widely used as a reliable proxy of non‐methane volatile organic compounds (NMVOCs) to constrain underlying emissions and chemistry. Here we examine global significant changes in HCHO columns at the early stage of the COVID‐19 pandemic (January–April 2020) compared with the same period in 2019 with observations from the TROPOspheric Monitoring Instrument (TROPOMI). HCHO columns decline (11.0%) in the Northern China Plain (NCP) because of a combination of meteorological impacts, lower HCHO yields as NOx emission plunges (by 36.0%), and reduced non‐methane NMVOC emissions (by 15.0%) resulting from the lockdown. HCHO columns change near Beijing (+8.4%) due mainly to elevated hydroxyl radical as NOx emission decreases in a NOx‐saturated regime. HCHO columns change in Australia (+17.5%), Northeastern Myanmar of Southeast Asia (+14.9%), Central Africa (+7.8%), and Central America (+18.9%), consistent with fire activities. Our work also points to other changes related to temperature and meteorological variations. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313836 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Wenfu Sun,Lei Zhu,Isabelle De Smedt,等. Global Significant Changes in Formaldehyde (HCHO) Columns Observed from Space at the Early Stage of the COVID‐19 Pandemic[J]. Geophysical Research Letters,2021. |
APA | Wenfu Sun.,Lei Zhu.,Isabelle De Smedt.,Bin Bai.,Dongchuan Pu.,...&Xin Yang.(2021).Global Significant Changes in Formaldehyde (HCHO) Columns Observed from Space at the Early Stage of the COVID‐19 Pandemic.Geophysical Research Letters. |
MLA | Wenfu Sun,et al."Global Significant Changes in Formaldehyde (HCHO) Columns Observed from Space at the Early Stage of the COVID‐19 Pandemic".Geophysical Research Letters (2021). |
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