气候变化领域集成服务门户(CCPortal): Transboundary air pollution reduction rapidly reflected in stream water chemistry in forested catchment on the sea of Japan coast in central Japan

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DOI	10.1016/j.atmosenv.2021.118223
	Transboundary air pollution reduction rapidly reflected in stream water chemistry in forested catchment on the sea of Japan coast in central Japan
	Sase H.; Saito T.; Takahashi M.; Morohashi M.; Yamashita N.; Inomata Y.; Ohizumi T.; Nakata M.
发表日期	2021
ISSN	1352-2310
卷号	248
英文摘要	Since the 1980s, Japan has been affected by transboundary air pollution from the Asian continent due to northwesterly seasonal winds in the winter. However, after peaks in 2006 and 2011/2012, sulfur dioxide (SO2) and nitrogen oxide (NOx) emissions began decreasing, respectively. To assess the biogeochemical response of forest ecosystems to the changing atmospheric deposition, flux observations of rainfall outside forest canopies (RF), throughfall and stemflow (TF + SF), and stream water (SW) chemistry were conducted in a Japanese cedar plantation in Kajikawa (KJK) on the Sea of Japan coast in central Japan. Fluxes of S and N by RF and TF + SF at KJK significantly decreased during the observation period (2002–2018). The non-sea salt sulfate (SO42−) flux by TF + SF peaked in 2006/2007 and decreased thereafter, which likely reflected the S emission trends. Accordingly, SO42− concentrations in SW at KJK decreased with increasing alkalinity. Similar decreases in SO42− concentrations beginning in 2006, 2007, and 2008 were observed at eight monitoring lakes in Japan. Thus, the SW chemistry at KJK and possibly that of Japanese lakes were sensitive to atmospheric S deposition reductions. However, as of late, the net S export at KJK has been increasing, exhibiting budget discrepancies in 2014/2015 and 2017/2018. Sulfur isotopic analysis suggested that the S deposited from the atmosphere was retained/cycled in the forest before it was gradually discharged into SW. Thus, a slightly weakened reaction of the output due to the internal cycle and residual effects of previous years may have caused the S budget discrepancies. The nitrate (NO3−) concentration in the SW at KJK has also been continuously increasing. N deposition and other factors, such as the maturation of the planted trees, may play an important role in NO3− leaching in plantations. © 2021 The Author(s)
关键词	Long-term trends Nitrogen leaching Reaction of ecosystems Recovery from acidification Sulfur deposition Transboundary air pollution
语种	英语
scopus关键词	Air pollution; Alkalinity; Budget control; Catchments; Deposition; Ecosystems; Forestry; Lake pollution; Lakes; Meteorological problems; Nitrogen oxides; Sulfur dioxide; Atmospheric depositions; Atmospheric S deposition; Biogeochemical response; Forested catchments; Isotopic analysis; Observation Period; Streamwater chemistry; Trans-boundary air pollutions; Atmospheric chemistry; nitrogen; rain; sulfur dioxide; water; atmospheric deposition; atmospheric pollution; catchment; concentration (composition); forest canopy; forest ecosystem; leaching; spatiotemporal analysis; streamwater; transboundary pollution; water chemistry; acidification; air pollution; alkalinity; Article; atmospheric deposition; canopy; catchment area (hydrology); chemical analysis; climate; environmental monitoring; forest management; Japan; Japanese cedar; leaching; nonhuman; precipitation; priority journal; Sea of Japan; stream (river); wet deposition; Pacific Ocean; Sea of Japan; Cryptomeria japonica
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248569
作者单位	Asia Center for Air Pollution Research, Niigata, Japan; Niigata Prefectural Government, Niigata, Japan; Niigata University, Niigata, Japan; Forestry and Forest Products Research Institute, Tsukuba, Japan; Kanazawa University, Kanazawa, Japan
推荐引用方式 GB/T 7714	Sase H.,Saito T.,Takahashi M.,et al. Transboundary air pollution reduction rapidly reflected in stream water chemistry in forested catchment on the sea of Japan coast in central Japan[J],2021,248.
APA	Sase H..,Saito T..,Takahashi M..,Morohashi M..,Yamashita N..,...&Nakata M..(2021).Transboundary air pollution reduction rapidly reflected in stream water chemistry in forested catchment on the sea of Japan coast in central Japan.ATMOSPHERIC ENVIRONMENT,248.
MLA	Sase H.,et al."Transboundary air pollution reduction rapidly reflected in stream water chemistry in forested catchment on the sea of Japan coast in central Japan".ATMOSPHERIC ENVIRONMENT 248(2021).