...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric environment >Climatology of mixing layer height in China based on multi-year meteorological data from 2000 to 2013
【24h】

Climatology of mixing layer height in China based on multi-year meteorological data from 2000 to 2013

机译：基于2000-2013年多年气象数据的中国混合层高度气候学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Atmospheric aerosol levels are high in different regions of China. Changes in atmospheric stability and mixing layer height (MLH) may affect the vertical aerosol distribution during pollution events. Here, we continuous studied the spatiotemporal distribution of MLH in China over 2000-2013 to characterize the regional-scale properties of atmospheric boundary layers. MLH was larger in the Southern Coastal and Southeastern China (1241.5 +/- 73.5 and 632.7 +/- 61.8m, respectively), but lower in Eastern and Southwestern China (518.1 +/- 63.6 and 462.7 +/- 88.5 m, respectively). We divided the monitoring stations into 11 regions; these regions could be classified into three types with an increasing linear trend (95% confidence level), with a decreasing linear trend (95% confidence level), and with fluctuation changes. In all regions, MLH was higher in spring and summer than in autumn and winter. The spatial distribution of the diurnal MLH increased significantly at 1400 BJT (Beijing time) in all regions, with the strongest radiation being noted during the daytime. Higher levels of PM2.5 with corresponding lower MLH were noted during winter, indicating that lower MLH could confine the pollutant diffusion to near the surface. By contrast, in spring, higher MLH could be potentially due to the dynamic condition. In general, the poor air quality days occurred more frequently in winter than in other seasons. As the air quality worsened, most MLH showed a decreasing trend in almost all regions. This work provides information that aids in further understanding not only MLH distribution in China but also specific PM-MLH interaction to facilitate regional atmospheric environment monitoring and prediction.
机译：中国不同地区的大气气溶胶含量很高。大气稳定性和混合层高度（MLH）的变化可能会影响污染事件期间的垂直气溶胶分布。在这里，我们继续研究了2000-2013年中国MLH的时空分布，以表征大气边界层的区域尺度特征。 MLH在中国南部沿海和东南地区较大（分别为1241.5 +/- 73.5和632.7 +/- 61.8m），但在中国东部和西南地区则较低（分别为518.1 +/- 63.6和462.7 +/- 88.5 m） 。我们将监控站划分为11个区域。这些区域可以分为线性趋势增加（置信度为95％），线性趋势减少（置信度为95％）和波动变化的三种类型。在所有地区，春季和夏季的MLH均高于秋季和冬季。在北京时间1400 BJT（北京时间），每日MLH的空间​​分布显着增加，白天辐射最强。在冬季，人们注意到较高的PM2.5水平和相应的MLH降低，这表明较低的MLH可以将污染物扩散限制在地表附近。相比之下，在春季，动态条件可能会导致更高的MLH。通常，冬季空气质量差的日子比其他季节多发生。随着空气质量的恶化，几乎所有地区的大多数MLH都呈下降趋势。这项工作提供的信息不仅有助于进一步了解中国的MLH分布，而且有助于进一步了解PM-MLH相互作用，以促进区域大气环境的监测和预测。

著录项

  • 来源
    《Atmospheric environment》 |2019年第9期|90-103|共14页
  • 作者

    Zhao Hujia; Che Huizheng; Xia Xiangao; Wang Yaqiang; Wang Hong; Wang Peng; Ma Yanjun; Yang Hongbin; Liu Yuche; Wang Yangfeng; Gui Ke; Sun Tianze; Zheng Yu; Zhang Xiaoye;

  • 作者单位

    China Meteorol Adm Inst Atmospher Environm Shenyang 110016 Liaoning Peoples R China|CMA Chinese Acad Meteorol Sci Inst Atmospher Composit State Key Lab Severe Weather LASW Beijing 100081 Peoples R China|CMA Chinese Acad Meteorol Sci Inst Atmospher Composit Key Lab Atmospher Chem Beijing 100081 Peoples R China;

    CMA Chinese Acad Meteorol Sci Inst Atmospher Composit State Key Lab Severe Weather LASW Beijing 100081 Peoples R China|CMA Chinese Acad Meteorol Sci Inst Atmospher Composit Key Lab Atmospher Chem Beijing 100081 Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys LAGEO Beijing 100029 Peoples R China;

    Heilongjiang Meteorol Adm Longfengshan Atmospher Background Reg Stn Harbin 150209 Heilongjiang Peoples R China;

    China Meteorol Adm Inst Atmospher Environm Shenyang 110016 Liaoning Peoples R China;

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

    Aerosol; Mixing layer height; Particulate matter;

    机译：气雾剂;混合层高度;颗粒物;

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