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result(s) for
"极端降水事件"
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Wet deposition and scavenging ratio of air pollutants during an extreme rainstorm in the North China Plain
by
Pan Yue-Peng Zhu Xia-Ying Tian Shi-Li Wang Li-Li Zhang Guo-Zhong Zhou Yan-Bo Xu Peng Hu Bo Wang Yue-Si
in
Air pollution
,
Aquatic environment
,
Atmospheric precipitations
2017
大气湿沉降是陆地和水体环境中营养成分和有毒物质的重要来源。以往湿沉降研究较多关注年尺度或年际变化,极端降水事件鲜见报道。通过实验观测,发现2016年7月19–21日华北极端暴雨(北京观测站325.6 mm)有效清除了区域大气颗粒物,但不同化学成分被湿清除的效率存在差异(无机离子比有机物和气态污染物更容易被湿清除)。此次极端降水铵盐和硝酸盐的湿沉降通量占北京全年的22%和4%,相当于青藏高原一年的氮沉降。考虑到气候背景下极端暴雨出现的频次,极端降水的生态环境影响需要更精细化的评估。
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