Atmospheric sulfur hexafluoride in-situ measurements at the Shangdianzi regional background station in China.
Atmospheric sulfur hexafluoride in-situ measurements at the Shangdianzi regional background station in China.
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DOI：
10.1016/j.jes.2014.03.004
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发表时间：
2014-12
影响因子：
6.9
通讯作者：
B. Yao;Ling-xi Zhou;Lingjun Xia;Gen Zhang;Li-feng Guo;Zhao Liu;S. Fang
中科院分区：
文献类型：
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作者：
B. Yao;Ling-xi Zhou;Lingjun Xia;Gen Zhang;Li-feng Guo;Zhao Liu;S. Fang
本文介绍了2009年6月至2011年5月，利用欧洲和亚洲温室气体观测系统和先进的全球大气气体实验（AGAGE）技术，在中国上店子区域背景站点使用自动气相色谱-电子捕获检测器系统和气相色谱/质谱系统对大气六氟化硫（SF6）进行的现场测量。研究期间sf6的平均背景比和污染混合比分别为7.22 × 10 - 12（mol/mol，下同）和8.66 × 10 - 12。上店子的平均sf6背景混合比与位于相似纬度的AGAGE站（Trinidad Head和Mace Head）一致，但大于位于南半球的AGAGE站（Cape Grim和Cape Matatula）。sf6背景混合比在我们的研究期间迅速增加，正增长率为0.30 × 10−12year−1。sf6背景条件的季节周期峰对峰振幅为0.07 × 10−12，而污染条件的季节波动为2.16 × 10−12。研究期间，sf6混合比峰值出现在秋季，局地地面水平风来自W/WSW/SW/SWS/S扇区，sf6混合比低值出现在来自N/NNE/NE/ENE/E扇区。
We presentin-situmeasurements of atmospheric sulfur hexafluoride (SF6) conducted by an automated gas chromatograph–electron capture detector system and a gas chromatography/mass spectrometry system at a regional background site, Shangdianzi, in China, from June 2009 to May 2011, using the System for Observation of Greenhouse gases in Europe and Asia and Advanced Global Atmospheric Gases Experiment (AGAGE) techniques. The mean background and polluted mixing ratios for SF6during the study period were 7.22 × 10− 12(mol/mol, hereinafter) and 8.66 × 10− 12, respectively. The averaged SF6background mixing ratios at Shangdianzi were consistent with those obtained at other AGAGE stations located at similar latitudes (Trinidad Head and Mace Head), but larger than AGAGE stations in the Southern Hemisphere (Cape Grim and Cape Matatula). SF6background mixing ratios increased rapidly during our study period, with a positive growth rate at 0.30 × 10− 12year− 1. The peak to peak amplitude of the seasonal cycle for SF6background conditions was 0.07 × 10− 12, while the seasonal fluctuation of polluted conditions was 2.16 × 10− 12. During the study period, peak values of SF6mixing ratios occurred in autumn when local surface horizontal winds originated from W/WSW/SW/SWS/S sectors, while lower levels of SF6mixing ratios appeared as winds originated from N/NNE/NE/ENE/E sectors.