【摘要】 本文利用改进了的T21L7模式模拟了1月和7月的全球气候平均场。对同一季节而言,模式中的海面温度、海冰分布和太阳天顶角是固定的,地面温度由地面能量平衡方程求解,模拟过程中均考虑了垂直扩散及陆面水分循环因素。结果表明,纬度-高度分布的纬向风成功地模拟出来了,模式能够捕获冬半球对流层与平流层西风急流,并且急流中心的位置和强度与实况基本吻合。除此之外,模拟的纬度-高度分布的温度场与实测值基本相似,只是夏半球极地500 hPa以下温度的水平梯度不明显。从模拟的海平面气压和地面气温来看,模式能够清楚地分辨大尺度海洋与陆地造成的不同气候系统。更多还原

【Abstract】 In this paper, We simulated January and July global climate utilizing the modified T21L7 model. The sea-surface temperature, the sea-ice distribution and solar zenith angle are constant in each simulation. Land surface temperature are solved by land surface energy equilibrium equation. Vertical diffusion and land water cycle are also considered. The latitude-height distribution of the zonal wind is successfully simulated. The model can show westerly jets between in the troposphere and stratosphere in winter hemisphere, and the location and strength of jets centers are basically consistent with real. The latitude-height distribution of the temperature is similar with real, only the horizontal temperature gradients below 500 hPa in summer hemisphere polar area are not evident. The sea-level pressure and surface air temperature shows, the model can clearly discriminate the different climate systems caused by large scale ocean and continent.更多还原