气候变化领域集成服务门户(CCPortal): The response of the Amazon ecosystem to the photosynthetically active radiation fields: Integrating impacts of biomass burning aerosol and clouds in the NASA GEOS Earth system model

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DOI	10.5194/acp-21-14177-2021
	The response of the Amazon ecosystem to the photosynthetically active radiation fields: Integrating impacts of biomass burning aerosol and clouds in the NASA GEOS Earth system model
	Bian H.; Lee E.; Koster R.D.; Barahona D.; Chin M.; Colarco P.R.; Darmenov A.; Mahanama S.; Manyin M.; Norris P.; Shilling J.; Yu H.; Zeng F.
发表日期	2021
ISSN	1680-7316
起始页码	14177
结束页码	14197
卷号	21 期号:18
英文摘要	The Amazon experiences fires every year, and the resulting biomass burning aerosols, together with cloud particles, influence the penetration of sunlight through the atmosphere, increasing the ratio of diffuse to direct photosynthetically active radiation (PAR) reaching the vegetation canopy and thereby potentially increasing ecosystem productivity. In this study, we use the NASA Goddard Earth Observing System (GEOS) model with coupled aerosol, cloud, radiation, and ecosystem modules to investigate the impact of Amazon biomass burning aerosols on ecosystem productivity, as well as the role of the Amazon's clouds in tempering this impact. The study focuses on a 7-year period (2010-2016) during which the Amazon experienced a variety of dynamic environments (e.g., La Niña, normal years, and El Niño). The direct radiative impact of biomass burning aerosols on ecosystem productivity - called here the aerosol diffuse radiation fertilization effect - is found to increase Amazonian gross primary production (GPP) by 2.6ĝ€¯% via a 3.8ĝ€¯% increase in diffuse PAR (DFPAR) despite a 5.4ĝ€¯% decrease in direct PAR (DRPAR) on multiyear average during burning seasons. On a monthly basis, this increase in GPP can be as large as 9.9ĝ€¯% (occurring in August 2010). Consequently, the net primary production (NPP) in the Amazon is increased by 1.5ĝ€¯%, or g1/492ĝ€¯TgCyr-1 - equivalent to g1/437ĝ€¯% of the average carbon lost due to Amazon fires over the 7 years considered. Clouds, however, strongly regulate the effectiveness of the aerosol diffuse radiation fertilization effect. The efficiency of this fertilization effect is the highest in cloud-free conditions and linearly decreases with increasing cloud amount until the cloud fraction reaches g1/40.8, at which point the aerosol-influenced light changes from being a stimulator to an inhibitor of plant growth. Nevertheless, interannual changes in the overall strength of the aerosol diffuse radiation fertilization effect are primarily controlled by the large interannual changes in biomass burning aerosols rather than by changes in cloudiness during the studied period. © Copyright:
语种	英语
scopus关键词	aerosol; annual variation; biological production; biomass burning; cloud cover; ecosystem response; EOS; forest fire; growth response; light availability; net primary production; photosynthetically active radiation; seasonal variation; tropical forest; Amazonia
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246561
作者单位	Joint Center for Environmental Technology Umbc, Baltimore, MD 21250, United States; Laboratory for Atmospheres, Nasa Goddard Space Flight Center, Greenbelt, MD 20771, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD 21046, United States; Global Modeling and Assimilation Office, Nasa Goddard Space Flight Center, Greenbelt, MD 20771, United States; Science Systems and Applications Inc., Lanham, MD 20706, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States
推荐引用方式 GB/T 7714	Bian H.,Lee E.,Koster R.D.,et al. The response of the Amazon ecosystem to the photosynthetically active radiation fields: Integrating impacts of biomass burning aerosol and clouds in the NASA GEOS Earth system model[J],2021,21(18).
APA	Bian H..,Lee E..,Koster R.D..,Barahona D..,Chin M..,...&Zeng F..(2021).The response of the Amazon ecosystem to the photosynthetically active radiation fields: Integrating impacts of biomass burning aerosol and clouds in the NASA GEOS Earth system model.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(18).
MLA	Bian H.,et al."The response of the Amazon ecosystem to the photosynthetically active radiation fields: Integrating impacts of biomass burning aerosol and clouds in the NASA GEOS Earth system model".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.18(2021).