气候变化领域集成服务门户(CCPortal): Natural sea-salt emissions moderate the climate forcing of anthropogenic nitrate

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DOI	10.5194/acp-20-771-2020
	Natural sea-salt emissions moderate the climate forcing of anthropogenic nitrate
	Chen Y.; Cheng Y.; Ma N.; Wei C.; Ran L.; Wolke R.; Größ J.; Wang Q.; Pozzer A.; Van Der Gon H.A.C.D.; Spindler G.; Lelieveld J.; Tegen I.; Su H.; Wiedensohler A.
发表日期	2020
ISSN	16807316
起始页码	771
结束页码	786
卷号	20 期号:2
英文摘要	Natural sea-salt aerosols, when interacting with anthropogenic emissions, can enhance the formation of particulate nitrate. This enhancement has been suggested to increase the direct radiative forcing of nitrate, called the "massenhancement effect". Through a size-resolved dynamic mass transfer modeling approach, we show that interactions with sea salt shift the nitrate from sub-to super-micron-sized particles ("redistribution effect"), and hence this lowers its efficiency for light extinction and reduces its lifetime. The redistribution effect overwhelms the mass-enhancement effect and significantly moderates nitrate cooling; e.g., the nitrateassociated aerosol optical depth can be reduced by 10 %-20% over European polluted regions during a typical seasalt event, in contrast to an increase by ∼ 10% when only accounting for the mass-enhancement effect. Global model simulations indicate significant redistribution over coastal and offshore regions worldwide. Our study suggests a strong buffering by natural sea-salt aerosols that reduces the climate forcing of anthropogenic nitrate, which had been expected to dominate the aerosol cooling by the end of the century. Comprehensive considerations of this redistribution effect foster better understandings of climate change and nitrogen deposition. © Author(s) 2020.
关键词	aerosol aerosol composition anthropogenic source climate forcing nitrate optical depth particulate matter sea salt Europe
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132288
推荐引用方式 GB/T 7714	Chen Y.,Cheng Y.,Ma N.,et al. Natural sea-salt emissions moderate the climate forcing of anthropogenic nitrate[J]. Atmospheric Chemistry and Physics,2020,20(2).
APA	Chen Y..,Cheng Y..,Ma N..,Wei C..,Ran L..,...&Wiedensohler A..(2020).Natural sea-salt emissions moderate the climate forcing of anthropogenic nitrate.,20(2).
MLA	Chen Y.,et al."Natural sea-salt emissions moderate the climate forcing of anthropogenic nitrate".20.2(2020).