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doi:  10.12013/qxyjzyj2018-012
基于CloudSat观测资料对WRF模式的冷锋降水过程云参数模拟效果检验

Numerical simulation test of cloud parameters in a cloud front precipitation process by using WRF model based on CloudSat observation data
摘要点击 25  全文点击 19  投稿时间:2018-03-11  修订日期:2018-05-28
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基金:  国家自然科学基金项目(编号:41475069;41075034)
中文关键词:  WRF模式,CloudSat资料,云参数,模拟,检验
英文关键词:  WRF model  CloudSat data  cloud parameter  simulation  test
        
作者中文名作者英文名单位
李思聪Li Sicong国防科技大学 气象海洋学院
李昀英Li Yunying国防科技大学 气象海洋学院
孙国荣Sun Guorong国防科技大学 气象海洋学院
引用:李思聪,李昀英,孙国荣.2018,基于CloudSat观测资料对WRF模式的冷锋降水过程云参数模拟效果检验[J].气象与减灾研究,41(2):81-89
中文摘要:
      基于WRF数值模式,采用Lin微物理方案,对中国南方地区一次冷锋降水过程进行模拟试验,并用CloudSat观测数据对模式模拟的云量、云液态水和云冰水含量的垂直分布特征进行检验。结果表明:模式模拟云量的垂直分布范围小于CloudSat观测到的分布范围,模拟的云量在低空往往出现缺失,模式可以较好地模拟出CloudSat探测到的深对流云的分布,但对零散分布的小尺度云团模拟效果较差;模式模拟的云液态水分布范围也小于CloudSat观测到的分布范围,云液态水含量值略低于CloudSat观测值,对CloudSat观测的云液态水含量值较低的区域,模式往往不能模拟出云液态水的存在;模式模拟的云冰水垂直分布特征与CloudSat观测结果较为一致,特别是对冰水含量大值中心的位置模拟效果较好,但模式模拟的云冰水含量值远低于CloudSat观测值。整体来看,模式对云冰水垂直分布的模拟效果优于对云液态水的模拟,但Lin微物理方案对云液态水和云冰水的模拟还需进一步改进与完善。
Abstract:
      Based on WRF model, the simulation of a cold front precipitation process in the south of China was performed using Lin microphysics schemes, and the simulated vertical distribution characteristics of model simulated cloud fraction, cloud liquid water content and ice water content were tested based on the CloudSat products. The results indicated that the simulated distribution range of cloud fraction was smaller than that of CloudSat, and the simulated cloud fraction was always deficient in lower altitude. The simulated vertical distribution of deep convective clouds was in good agreement with that of CloudSat. However,the simulated result was not so good for the scattered small scale cloud cluster. The simulated distribution range of cloud liquid water content was smaller than that of CloudSat, and the value of cloud liquid water content was slightly lower than that of CloudSat. For those areas with relatively lower cloud liquid water content value measured by CloudSat, the cloud liquid water content couldnt be simulated in most cases. The simulated vertical distribution characteristics of cloud ice water content was relatively consistent with that of CloudSat, and the simulation effect was significantly good in the central position with high cloud ice water content value. However, the simulated cloud ice water content value was considerably lower than that of CloudSat. On the whole, the simulated distribution characteristics of cloud ice water content were relatively more consistent with the observations, and the Lin microphysical scheme needs to be further improved and perfected.
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