Volume 29 Issue 6
Nov.  2009
Turn off MathJax
Article Contents
Liu Yi, Liu Chuanxi. Simulation Studies on Seasonal Variations of the Stratospheric Dynamics and Trace Gases Using Coupled Chemistry-Climate Model WACCM-3[J]. Chinese Journal of Space Science, 2009, 29(6): 580-590. doi: 10.11728/cjss2009.06.580
Citation: Liu Yi, Liu Chuanxi. Simulation Studies on Seasonal Variations of the Stratospheric Dynamics and Trace Gases Using Coupled Chemistry-Climate Model WACCM-3[J]. Chinese Journal of Space Science, 2009, 29(6): 580-590. doi: 10.11728/cjss2009.06.580

Simulation Studies on Seasonal Variations of the Stratospheric Dynamics and Trace Gases Using Coupled Chemistry-Climate Model WACCM-3

doi: 10.11728/cjss2009.06.580
  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2009-11-15
  • The coupled chemistry-climate model WACCM-3 (Whole Atmosphere Community Climate Model) developed by NCAR is applied to study the seasonal variations of the stratospheric wind, temperature and trace gases such as O3, CH4, N2O, H2O, HCl, HNO3. Comparisons of the ECMWF/ERA-40 dynamics and observed trace gases from HALOE, MLS, CLEAS on UARS satellite show that the WACCM-3 simulation forced by the climatological Sea-Surface Temperature can generally reproduce the observed characteristics in the seasonal cycles of the stratospheric zonal winds, temperatures and chemical tracers. However, some obvious biases exist in model dynamics, which are closely associated with biases in the distributions of trace gases. Especially, the circumpolar westerlies during austral winter (July) and spring (October) in WACCM-3 model are too strong, which can cause a stronger barrier to the poleward transports of warm air and long-lived trace gases (e.g., CH4, N2O, H2O) in Antarctic lower stratosphere. Moreover, this cold bias also enhances the denitrification and dehydration effects during the formation of Polar Stratospheric Cloud (PSC), on the surface of which more HCl are activated through a series of heterogeneous reactions. As a result, the simulated concentrations of chemical tracers (e.g., CH4, N2O, H2O, HCl, HNO3) are prominently lower than observations in the Antarctic lower stratosphere during wintertime and springtime. In addition, there are also biases in the tropical stratospheric easterlies and the meridional transports of stratospheric tracers (e.g., O3, CH4, N2O, H2O), since WACCM-3 does not generate a Quasi-Biennial Oscillation (QBO) in tropical stratospheric winds.

     

  • loading
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article Views(3655) PDF Downloads(1405) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return