气候变化领域集成服务门户(CCPortal): Reductions in NO2 burden over north equatorial Africa from decline in biomass burning in spite of growing fossil fuel use, 2005 to 2017

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DOI	10.1073/pnas.2002579118
	Reductions in NO2 burden over north equatorial Africa from decline in biomass burning in spite of growing fossil fuel use, 2005 to 2017
	Hickman J.E.; Andela N.; Tsigaridis K.; Galy-Lacaux C.; Ossohou M.; Bauer S.E.
发表日期	2021
ISSN	00278424
卷号	118 期号:7
英文摘要	Socioeconomic development in low- and middle-income countries has been accompanied by increased emissions of air pollutants, such as nitrogen oxides [NOx: nitrogen dioxide (NO2) + nitric oxide (NO)], which affect human health. In sub-Saharan Africa, fossil fuel combustion has nearly doubled since 2000. At the same time, landscape biomass burning—another important NOx source—has declined in north equatorial Africa, attributed to changes in climate and anthropogenic fire management. Here, we use satellite observations of tropospheric NO2 vertical column densities (VCDs) and burned area to identify NO2 trends and drivers over Africa. Across the northern ecosystems where biomass burning occurs—home to hundreds of millions of people—mean annual tropospheric NO2 VCDs decreased by 4.5% from 2005 through 2017 during the dry season of November through February. Reductions in burned area explained the majority of variation in NO2 VCDs, though changes in fossil fuel emissions also explained some variation. Over Africa’s biomass burning regions, raising mean GDP density (USD·km−2) above its lowest levels is associated with lower NO2 VCDs during the dry season, suggesting that economic development mitigates net NO2 emissions during these highly polluted months. In contrast to the traditional notion that socioeconomic development increases air pollutant concentrations in low- and middle-income nations, our results suggest that countries in Africa’s northern biomass-burning region are following a different pathway during the fire season, resulting in potential air quality benefits. However, these benefits may be lost with increasing fossil fuel use and are absent during the rainy season. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Air pollution \| trace gas emissions \| biomass burning \| sustainable development
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180614
作者单位	NASA Goddard Institute for Space Studies, New York, NY 10025, United States; Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Center for Climate Systems Research, Columbia University, New York, NY 10025, United States; Laboratoire d’Aérologie, Université Toulouse III Paul Sabatier, CNRS, Tolouse, 31400, France; Laboratoire de Physique de l’Atmosphère et de Mécanique des Fluides, Université Félix Houphouët-Boigny, 22 BP 582 22, Abidjan, Cote d'Ivoire; School of Earth and Ocean Sciences, Cardiff University, Cardiff, CF103AT, United Kingdom
推荐引用方式 GB/T 7714	Hickman J.E.,Andela N.,Tsigaridis K.,et al. Reductions in NO2 burden over north equatorial Africa from decline in biomass burning in spite of growing fossil fuel use, 2005 to 2017[J],2021,118(7).
APA	Hickman J.E.,Andela N.,Tsigaridis K.,Galy-Lacaux C.,Ossohou M.,&Bauer S.E..(2021).Reductions in NO2 burden over north equatorial Africa from decline in biomass burning in spite of growing fossil fuel use, 2005 to 2017.Proceedings of the National Academy of Sciences of the United States of America,118(7).
MLA	Hickman J.E.,et al."Reductions in NO2 burden over north equatorial Africa from decline in biomass burning in spite of growing fossil fuel use, 2005 to 2017".Proceedings of the National Academy of Sciences of the United States of America 118.7(2021).