气候变化领域集成服务门户(CCPortal): Why is the Indo-Gangetic Plain the region with the largest NH3column in the globe during pre-monsoon and monsoon seasons?

CCPortal

DOI	10.5194/acp-20-8727-2020
	Why is the Indo-Gangetic Plain the region with the largest NH3column in the globe during pre-monsoon and monsoon seasons?
	Wang T.; Song Y.; Xu Z.; Liu M.; Xu T.; Liao W.; Yin L.; Cai X.; Kang L.; Zhang H.; Zhu T.
发表日期	2020
ISSN	1680-7316
起始页码	8727
结束页码	8736
卷号	20 期号:14
英文摘要	Satellite observations show a global maximum in ammonia (NH3) over the Indo-Gangetic Plain (IGP), with a peak from June to August. However, it has never been explained explicitly. In this study, we investigated the causes of high NH3 loading over the IGP during the pre-monsoon and monsoon seasons using WRF-Chem (Weather Research and Forecasting model coupled to chemistry). The IGP has relatively high NH3 emission fluxes (0.4 t km-2 month-1/due to intensive agricultural activities and high air temperature from June to August. Additionally, low sulfur dioxide (SO2) and nitrogen oxides (NOx) emissions and high air temperature limit the gas-to-particle conversion of NH3, particularly for ammonium nitrate formation. Moreover, the barrier effects of the Himalayas in combination with the surface convergence weaken the horizontal diffusion of NH3. The high NH3 loading over the IGP mainly results from the low gas-to-particle partitioning of NH3 caused by low SO2 and NOx emissions. It contrasts to those in the North China Plain, where high SO2 and NOx emissions promote the conversion of gaseous NH3 into particulate ammonium. © 2020 Author(s).
语种	英语
scopus关键词	agricultural emission; air temperature; ammonia; convergence; monsoon; nitrate; sulfur dioxide; weather forecasting; Gangetic Plain
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/141198
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, Department of Environmental Science, Peking University, Beijing, 100871, China; Environmental College, Chengdu University of Technology, Chengdu, 610059, China; Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; Beijing Innovation Center for Engineering Science and Advance Technology, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Wang T.,Song Y.,Xu Z.,et al. Why is the Indo-Gangetic Plain the region with the largest NH3column in the globe during pre-monsoon and monsoon seasons?[J],2020,20(14).
APA	Wang T..,Song Y..,Xu Z..,Liu M..,Xu T..,...&Zhu T..(2020).Why is the Indo-Gangetic Plain the region with the largest NH3column in the globe during pre-monsoon and monsoon seasons?.Atmospheric Chemistry and Physics,20(14).
MLA	Wang T.,et al."Why is the Indo-Gangetic Plain the region with the largest NH3column in the globe during pre-monsoon and monsoon seasons?".Atmospheric Chemistry and Physics 20.14(2020).