长三角地区全氟温室气体本底特征及来源

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摘要采用位于长三角地区的临安区域大气本底站罐采样获得的全氟温室气体（PFCs、SF₆、NF₃、SO₂F₂）浓度，分析2011~2020年该地区大气中全氟温室气体的浓度分布特征和变化趋势.结果显示，临安站绝大部分全氟温室气体的浓度均呈现逐年升高的变化趋势，至2020年长三角地区全氟温室气体本底浓度分别达到（86.30±0.52）×10^-12（CF₄）、（5.03±0.00）×10^-12（C₂F₆）、（0.70±0.01）×10^-12（C₃F₈）、（1.82±0.00）×10^-12（c-C₄F₈）、（10.44±0.01）×10^-12（SF₆）、（2.36±0.04）×10^-12（NF₃）、（2.61±0.05）×10^-12（SO₂F₂）.长三角地区大部分全氟温室气体的本底浓度与全球本底值接近.通过对临安站全氟温室气体污染浓度的潜在源贡献作用（PSCF）和浓度权重轨迹（CWT）分析显示，临安站全氟化碳PFCs （CF₄、C₄F₁₀、C₂F₆、C₃F₈、c-C₄F₈）的潜在源区主要包括山东、江苏、安徽、上海、浙江中北部和江西东北部地区，NF₃、SF₆、SO₂F₂的潜在源区则集中在江苏中南部、上海、浙北地区.

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	浦静姣
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关键词 ：全氟温室气体, 长三角, 浓度, 潜在源区

Abstract：The concentrations of perfluorinated greenhouse gases (PFCs, SF₆, NF₃ and SO₂F₂) were measured by means of canister sampling at Lin'an regional atmospheric background station, which was located in the Yangtze River Delta. The characteristics and long-term trends of the concentrations of these perfluorinated greenhouse gases from 2011 to 2020 were analyzed. The results showed that the concentrations of most perfluorinated greenhouse gases at Lin'an station had been increasing year by year. At 2020, the background concentrations of perfluorinated greenhouse gases in the Yangtze River Delta had reached the level of (86.30±0.52)×10^-12 (CF₄), (5.03±0.00)×10^-12 (C₂F₆), (0.70±0.01)×10^-12 (C₃F₈), (1.82±0.00)×10^-12 (c-C₄F₈), (10.44±0.01)×10^-12 (SF₆), (2.36±0.04)×10^-12 (NF₃), (2.61±0.05)×10^-12 (SO₂F₂), respectively, which were in consistent with the global background levels. Both Potential Source Contribution Function (PSCF) and Concentration-weighted Trajectory (CWT) methods were applied to reveal the potential source areas of perfluorinated greenhouse gases at Lin'an station. The results indicated that the potential source areas of PFCs (including CF₄, C₄F₁₀, C₂F₆, C₃F₈and c-C₄F₈) mainly covered the provinces of Shandong, Jiangsu, Anhui, Shanghai, Northern and Central Zhejiang and Northeast Jiangxi, while the potential source areas of NF₃, SF₆ and SO₂F₂ were concentrated in Central and Southern Jiangsu, Shanghai and Northern Zhejiang.

Key words： perfluorinated greenhouse gas Yangtze River Delta concentration potential source area

收稿日期: 2022-04-02

PACS:

X511

基金资助:国家重点研发计划项目（2020YFA0607502）；浙江省气象科技计划项目（2021ZD16）

通讯作者: 徐宏辉,正高级工程师,forsnow@126.com E-mail: forsnow@126.com

作者简介: 浦静姣(1981-),女,江苏苏州人,高级工程师,硕士,主要从事大气环境研究.发表论文10余篇.

引用本文:

浦静姣, 徐宏辉, 姚波, 张超, 单萌. 长三角地区全氟温室气体本底特征及来源[J]. 中国环境科学, 2022, 42(10): 4494-4500. PU Jing-jiao, XU Hong-hui, YAO Bo, ZHANG Chao, SHAN Meng. Characteristics of background conditions and potential source areas of atmospheric perfluorinated greenhouse gases in the Yangtze River Delta. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(10): 4494-4500.

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