BCC_CSM模式砾石参数化方案在青藏高原模拟效果检验

Simulation Effect Test of BCC_CSM Model of Gravel Parameterization Program in National Climate Center on Qinghai-Xizang Plateau

利用包含了砾石参数化方案的BCCAVIM陆面过程模式,并耦合到国家气候中心气候系统模式(BCCCSM)对青藏高原区域进行了模拟效果检验。然后使用CRA-40土壤温湿度产品和地面气温、降水的格点资料,通过对比原方案和新方案对土壤温湿度、地表气温和降水的模拟效果。结果表明,新方案减小了青藏高原地区土壤温湿度的偏差、均方根误差,增大了相关系数,BCCCSM中高原地区的地表气温的模拟值在加入砾石后更加符合观测,尤其是夏季,新方案地表气温与观测值的相关系数增大,均方根误差减小。BCCCSM中新方案在青藏高原地区降水的模拟效果也有所提升,降低了原方案对于降水量的模拟峰值,较原方案相比新方案趋势与观测更为接近。

Using the BCC_AVIM land surface process model including the gravel parameterization scheme,and coupled to the National Climate Center Climate System Model(BCC_CSM),the simulation effect of the Qinghai-Xizang Plateau region was tested.Then,using the CRA-40 soil temperature and humidity products and the grid data of surface temperature and precipitation,by comparing the simulation effects of the original scheme and the new scheme on soil temperature and humidity,surface temperature and precipitation,the results show that the new scheme reduces the Qinghai-Xizang Plateau area The deviation of soil temperature and humidity,the root mean square error,increase the correlation coefficient,the simulated value of surface temperature in the plateau area of BCC_CSM is more consistent with the observation after adding gravel,especially in summer,the correlation coefficient between the surface temperature of the new scheme and the observation value increases,and the root mean square error is reduced.The new program in BCC_CSM has also improved the precipitation simulation effect in the Qinghai-Xizang Plateau,reducing the simulated peak value of precipitation in the original program,which is closer to the observation than the original program.