气候变化领域集成服务门户(CCPortal): Trends of Precipitation Acidification and Determining Factors in China During 2006

CCPortal

DOI	10.1029/2019JD031301
	Trends of Precipitation Acidification and Determining Factors in China During 2006–2015
	Liu M.; Song Y.; Xu T.; Xu Z.; Wang T.; Yin L.; Jia X.; Tang J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:6
英文摘要	Precipitation acidification, often termed as acid rain (pH < 5.6), has been recognized as one of the major environmental issues in China since the 1980s and exerted detrimental effects on terrestrial ecosystems. In this study, we present the first investigation on the evolution of precipitation acidification over China during 2006–2015 based on a long-term nationwide precipitation observation network and chemical transport model (Weather Research and Forest model coupled with Chemistry) simulations. The observations demonstrate a clearly decreasing trend in precipitation acidification across China from 2006 to 2015. The percentages of the number of the stations experiencing heavy acidic precipitation (annual mean pH < 5.0) decrease from ~50% in 2006 to 20% in 2015, and those with pH < 4.5 decrease from 25% to less than 5%. Our model simulations reproduced this trend and show the notable decrease in the terrestrial area (from 30% to 16%) experiencing the mean precipitation pH < 5.6. The simulation experiments indicate that the mitigation of the acidification issue in China stemmed from the large reduction in SO2 emissions (by about 60% from 2006 to 2015), which would limit the formation of sulfate and also increase the wet scavenging of gaseous ammonia. The contributions of sulfuric acid on precipitation acidification were estimated to decrease from 0.70–0.82 to 0.44–0.60 from 2006 to 2015 over northern, southern, and southwestern China. This study suggests that nitric acid plays a more important role in acidifying precipitation in northern China at present, while sulfuric acid is still the dominant factor in southern areas. © 2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186116
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, Department of Environmental Science, Peking University, Beijing, China; Meteorological Observation Center, China Meteorological Administration, Beijing, China
推荐引用方式 GB/T 7714	Liu M.,Song Y.,Xu T.,等. Trends of Precipitation Acidification and Determining Factors in China During 2006–2015[J],2020,125(6).
APA	Liu M..,Song Y..,Xu T..,Xu Z..,Wang T..,...&Tang J..(2020).Trends of Precipitation Acidification and Determining Factors in China During 2006–2015.Journal of Geophysical Research: Atmospheres,125(6).
MLA	Liu M.,et al."Trends of Precipitation Acidification and Determining Factors in China During 2006–2015".Journal of Geophysical Research: Atmospheres 125.6(2020).