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Atmospheric Sulfur Deposition on Farmland in East China

机译：中国东部农田的大气硫沉积

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摘要

Atmospheric sulfur deposition onto typical farmland in East China was investigated using both field measurements and numerical modeling. The field measurements were conducted at the Experiment Station of Red Soil Ecology, Chinese Academy of Sciences, 10 km from Yingtan, Jiangxi Province, East China, between November 1998 and October 1999, and at the Changshu Ecological Experiment Station, Chinese Academy of Sciences, in a rapidly developing region of Jiangsu Province, East China, between April 2001 and March 2002. The regional acid deposition model system (RegADMS), in which the dry deposition velocities of SO2 and sulfate aerosols (SO42-) were estimated using a big-leaf resistance analogy model, was applied to simulate air sulfur deposition over East China and sulfur deposition onto lands of different use types in East China. The wet scavenging coefficients were parameterized in terms of precipitation rate, and the effect of sub-grid processes due to inhomogeneous land use on dry deposition velocity was also included. Results of the field measurements showed that over 83% of the total sulfur deposition at the Yingtan site was dry deposition, while at the Changshu site42% was dry deposition. The total sulfur deposition was much larger at the Yingtan site than at the Changshu site, which suggested contrasting air pollution and meteorological situations. The modeling results revealed that the total annual sulfur deposition over East China was 1.88 Mt, of which 72.8% was deposited onto farmland, and dry deposition accounted for 43% of the total sulfur deposited. The modeling results were generally in agreement with those from the observations.Overall, this study suggested that atmospheric sulfur deposition played an important role in the soil sulfur balance, which could have a significant effect on agricultural ecosystems in the study region.
机译：利用现场测量和数值模拟研究了华东典型农田上的大气硫沉积。野外测量是在1998年11月至1999年10月期间，在距离华东江西省鹰潭市10公里的中国科学院红壤生态实验站，以及在中国科学院常熟生态实验站进行的。于2001年4月至2002年3月间在华东江苏省一个快速发展的地区进行。区域酸沉降模型系统（RegADMS），其中SO2和硫酸盐气溶胶（SO42-）的干沉降速度使用大采用叶片抗性模拟模型来模拟华东地区的空气硫沉积和华东地区不同用途类型的土地上的硫沉积。根据降水速率对湿清除系数进行参数化，还包括由于土地利用不均匀而引起的子网格过程对干沉降速度的影响。现场测量结果表明，鹰潭厂区总硫沉积的83％以上为干法沉积，而常熟厂区42％的硫为干法沉积。鹰潭站点的总硫沉积量比常熟站点的总硫沉积量大得多，这表明空气污染和气象情况是相反的。模拟结果表明，华东地区每年的硫沉积总量为1.88 Mt，其中72.8％沉积在农田上，而干沉积占硫沉积总量的43％。总体模拟结果与实测结果基本吻合。总体而言，本研究表明大气中的硫沉积在土壤硫平衡中起着重要作用，这可能对研究区域的农业生态系统产生重大影响。

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  • 来源
    《土壤圈（英文版）》 |2005年第1期|120-128|共9页
  • 作者

    WANG Ti-Jian; YANG Hao-Ming; GAO Li-Jie; ZHANG Yan; HU Zheng-Yi; XU Cheng-Kai;

  • 作者单位

    Department of Atmospheric Science, Nanjing University, Nanjing 210093, China;

    Key Laboratory of Meteorological Disaster and Environmental Variation, Nanjing Institute of Meteorology, Nanjing 210044, China;

    Department of Atmospheric Science, Nanjing University, Nanjing 210093, China;

    Department of Atmospheric Science, Nanjing University, Nanjing 210093, China;

    Department of Atmospheric Science, Nanjing University, Nanjing 210093, China;

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Science, Nanjing 210008, China;

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Science, Nanjing 210008, China;

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 农业基础科学;
  • 关键词

    atmospheric sulfur deposition; East China; farmland;

    机译：大气硫沉积;华东;农田;
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