...
首页> 外文期刊>Atmospheric environment >Carbonyl sulfide, dimethyl sulfide and carbon disulfide in the Pearl River Delta of southern China: Impact of anthropogenic and biogenic sources
【24h】

Carbonyl sulfide, dimethyl sulfide and carbon disulfide in the Pearl River Delta of southern China: Impact of anthropogenic and biogenic sources

机译:中国南方珠江三角洲的羰基硫,二甲基硫和二硫化碳:人为和生物来源的影响

获取原文
获取原文并翻译 | 示例
           

摘要

Reduced sulfur compounds (RSCs) such as carbonyl sulfide (OCS), dimethyl sulfide (DMS) and carbon disulfide (CS_2) impact radiative forcing, ozone depletion, and acid rain. Although Asia is a large source of these compounds, until now a long-term study of their emission patterns has not been carried out Here we analyze 16 months of RSC data measured at a polluted rural/coastal site in the greater Pearl River Delta (PRD) of southern China. A total of 188 canister air samples were collected from August 2001 to December 2002. The OCS and CS_2 mixing ratios within these samples were higher in autumn/winter and lower in summer due to the influence of Asian monsoon circulations. Comparatively low DMS values observed in this coastal region suggest a relatively low biological productivity during summer months. The springtime OCS levels in the study region (574 ± 40 pptv) were 25% higher than those on other East Asia coasts such Japan, whereas the springtime CS_2 and DMS mixing ratios in the PRD (47 ± 38 pptv and 22 ± 5 pptv, respectively) were 3-30 times lower than elevated values that have been measured elsewhere in East Asia (Japan and Korea) at this time of year. Poor correlations were found among the three RSCs in the whole group of 188 samples, suggesting their complex and variable sources in the region. By means of backward Lagrangian particle release simulations, air samples originating from the inner PRD, urban Hong Kong and South China Sea were identified. The mean mixing ratio of OCS in the inner PRD was significantly higher than that in Hong Kong urban air and South China Sea marine air (p < 0.001), whereas no statistical differences were found for DMS and CS_2 among the three regions (p > 0.05). Using a linear regression method based on correlations with the urban tracer CO, the estimated OCS emission in inner PRD (49.6 ± 4.7 Gg yr~(-1)) was much higher than that in Hong Kong (0.32 ± 0.05 Gg yr~(-1)), whereas the estimated CS_2 and DMS emissions in the study region accounted for a very few percentage of the total CS_2 and DMS emission in China. These findings lay the foundation for better understanding sulfur chemistry in the greater PRD region of southern China.
机译:还原的硫化合物(RSC),例如羰基硫(OCS),二甲基硫(DMS)和二硫化碳(CS_2),会影响辐射强迫,臭氧消耗和酸雨。尽管亚洲是这些化合物的主要来源,但迄今为止尚未对其排放模式进行长期研究。在这里,我们分析了在大珠江三角洲(PRD)的受污染的农村/沿海地区测得的16个月RSC数据)。从2001年8月至2002年12月,共收集了188个碳罐空气样本。由于亚洲季风环流的影响,这些样本中的OCS和CS_2混合比在秋/冬较高,在夏季较低。在该沿海地区观察到的DMS值相对较低,表明夏季月份的生物生产力相对较低。研究区域的春季OCS水平(574±40 pptv)比其他东亚沿海地区(如日本)高25%,而珠三角的春季CS_2和DMS混合比(47±38 pptv和22±5 pptv,分别比去年同期在东亚其他地区(日本和韩国)测得的升高值低3-30倍。在整个188个样本中,三个RSC之间的相关性很差,表明它们在该地区的来源复杂而多变。通过向后拉格朗日粒子释放模拟,可以识别出来自内珠三角,香港市区和南海的空气样本。珠三角内部OCS的平均混合比显着高于香港城市空气和南海海洋空气中的(p <0.001),而这三个区域之间的DMS和CS_2没有统计学差异(p> 0.05) )。使用基于与城市示踪剂CO的相关性的线性回归方法,珠三角内部的OCS估算排放量(49.6±4.7 Gg yr〜(-1))远高于香港(0.32±0.05 Gg yr〜(-) 1)),而在研究区域中,估计的CS_2和DMS排放量仅占中国CS_2和DMS排放总量的很小一部分。这些发现为更好地了解中国南方大珠三角地区的硫化学奠定了基础。

著录项

  • 来源
    《Atmospheric environment》 |2010年第31期|P.3805-3813|共9页
  • 作者单位

    Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong;

    rnDepartment of Chemistry, University of California at Irvine, Irvine, USA;

    rnSchool of Atmospheric Sciences, Nanjing University, China;

    rnDepartment of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong;

    rnSchool of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, Perth, Australia;

    rnSchool of Atmospheric Sciences, Nanjing University, China;

    rnDepartment of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong;

    rnDepartment of Chemistry, University of California at Irvine, Irvine, USA;

    rnDepartment of Chemistry, University of California at Irvine, Irvine, USA;

    rnDepartment of Chemistry, University of California at Irvine, Irvine, USA;

    rnDepartment of Chemistry, University of California at Irvine, Irvine, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    reduced sulfur compounds; OCS; CS_2; DMS; greater pearl river delta;

    机译:还原硫化合物;OCS;CS_2;DMS;大珠江三角洲;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号