| TRMM/PR资料在中尺度模式MM5中的应用(英) |
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| 作者姓名： | XU Zhifang GE Wenzhong DANG Renqing Toshio IGUCHI Takao TAKADA |
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| 作者单位： | Department of Atmospheric Sciences，Nanjing University，Department of Atmospheric Sciences，Nanjing University，Department of Atmospheric Sciences，Nanjing University，Communications Research Laboratory，Institute for Hydrospheric Atmospheric Sciences Nanjing 210093，Nanjing 210093，Nanjing 210093，Nukui Kitamachi 4-2-1，Koganei，Tokyo 184，Japan，Nagoya University，Japan |
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| 基金项目： | This research was supported by the National Natural Science Foundation of China under Grant No.49794030. |
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| 摘 要： | 将中尺度非静力模式MM5中的积云参数化Grell方案作了改进,使它含有降水云的云水,即雨水含量,并用该模式对1998年6月29日08时-30日08时(北京时)和1998年7月1日08时-2日08时(北京时)发生在淮河流域的两次特大暴雨进行数值模拟研究,同时通过采用R-qr关系将TRMM/PR(Tropical Rainfall MeasuringMission/Precipition Radar)得到的降水强度资料R计算出比含水量qr,然后用q'v=qv+qr取代原模式中的比湿qv。结果表明将TRMM/PR资料加入模式后,由于PR雷达具有较高的空间分辨率,能够很好地反映中小尺度系统的空间结构,能够使湿度值接近实际,缩短了中尺度系统的发展时间,使得模拟出来的降雨强度、雨量中心位置以及雨带形状更接近实况。
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| 关 键 词： | TRMM/PR 数值模拟 比含水量 比湿 暴雨 Spin-up问题 积云参数化方案 |
| 收稿时间： | 18 April 2002 |
Application of TRMM/PR Data for Numerical Simulations with Mesoscale Model MM5 |
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| XU Zhifang,GE Wenzhong,DANG Renqing,Toshio IGUCHI,Takao TAKADA.Application of TRMM/PR Data for Numerical Simulations with Mesoscale Model MM5[J].Advances in Atmospheric Sciences,2003,20(2):185-193. |
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| Authors: | XU Zhifang GE Wenzhong DANG Renqing Toshio IGUCHI and Takao TAKADA |
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| Institution: | Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093,Communications Research Laboratory, Nukui Kitamachi 4-2-1, Koganei, Tokyo 184, Japan,Institute for Hydrospheric Atmospheric Sciences, Nagoya University, Japan |
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| Abstract: | Numerical simulations of two heavy rainfall cases in the Changjiang-Huaihe River basin are performed with TRMM/PR (precipitation radar) data incorporated into the PSU/NCAR meso scale model MM5.The mixing ratio of rainwater qr is obtained from the R-qr relation (R is the rainfall rate), and the mixing ratio of water vapor qv in the model is replaced by q'v=qv+qr. Then, TRMM/PR data are used to modify humidity analysis obtained from conventional radiosonde data, and sensitivity experiments (STE) are performed and compared to control experiments (CTL). Results show that both the heavy rainfall distribution and its maximum amounts from STE are improved compared with those from CTL. |
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| Keywords: | TRMM/PR numerical simulation mixing ratio of rainwater mixing ratio of vapor heavy rainfall spin-up problem cumulus parameterization scheme |
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