气象学报Issue(1)：49-61,13.DOI:10.11676/qxxb2014.006
BCC_AGCM2.1模式对平流层环流变化特征的数值模拟及其模式评估
摘要
Abstract
The Beijing Climate Center atmospheric general circulation model version 2.1 (BCC_AGCM2.1,or simply BCC)de-veloped by National Climate Center (NCC)is applied to investigate the stratospheric zonal circulation,upper level jet,polar vortex and stratospheric sudden warming (SSW)events.The comparative analyses of the simulative results with the ECMWF and NCEP reanalysis data show that the BCC_AGCM2.1 simulations forced by the observed sea-surface temperature,CO2 and aerosol can reproduce the observational characteristics in the distributions and seasonal cycles of the stratospheric zonal mean wind and temperature.The main differences between the reanalysis data and the simulated temperature profiles and upper level jets appear in the middle and high latitudes of the southern and northern hemisphere winter.The simulated stratospheric tem-perature is generally colder than that of observational results,and the obvious biases exist in the tropopause regions and the stratospheric upper levels.On the other hand,in the simulation results,the upper tropospheric subtropical jet locates a little southward with weaker intensity,while the stratospheric polar night j et is closer to the polar areas and stronger than the rean-alysis data.These distribution features of westerly jets lead to a stronger equatorial waveguide of planetary waves in the model, and the intensity of simulated planetary wave is weaker than that in reanalysis data.Therefore,the polar vortex in the model is much more stable and has lower temperature in the polar regions in northern hemisphere winter.In addition,the model is also able to reproduce the seasonal cycle of polar vortex,but with a bad simulation about the stratospheric sudden warming events happened in northern hemisphere winter.There are some differences between the simulation results and the reanalysis data a-bout the SSW processes,including the frequency of warming occurrence,the triggered time and warming intensity.These re-sults demonstrate that there is still a lot of work to do to improve the simulation ability of our BCC model.关键词
BCC_AGCM2.1/平流层气候/平流层极涡/行星波/平流层爆发性增温Key words
BCC_AGCM2.1 model/Stratospheric climate/Stratospheric polar vortex/Planetary wave/Stratospheric sudden warming分类
天文与地球科学引用本文复制引用
陆春晖,丁一汇,张莉..BCC_AGCM2.1模式对平流层环流变化特征的数值模拟及其模式评估[J].气象学报,2014,(1):49-61,13.基金项目
国家自然科学基金青年基金项目（41205041）、中国博士后科学基金面上项目（2012M510383）、国家重点基础研究发展计划项目（2010CB428606）。 （）
