| 两种不同积云参数化方案对1998年中国夏季洪涝灾害数值模拟的比较研究 |
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| 作者姓名： | PING Fan GAO Shouting WANG Huijun |
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| 作者单位： | InstituteofAtmospherePhysics,ChineseAcademyofSciences,Beijing10029 |
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| 基金项目： | This study was supported
jointly by the Chinese Academy of Sciences Key Aspects
Program for Knowledge Innovation Project(KZCX2-203)
and the National Natural Science Foundation of China un-
der Grant No.40035010. |
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| 摘 要： | 利用国家气候中心的全球T63谱模式，以1998年夏季(6-8月)我国长江中下游和东北嫩江—松花江流域发生的特大洪水为试验个例，分别采取原来模式中的Kuo积云参数比方案和UKMO/unifled的Gregory积云参数比方案进行了整个夏季的逐月降水预报的对比试验。结果表明：Gregory质量通量方案能给出较Kuo方案更加合理的降水落区，并且对降水量的预报也有显著的改进。此外，Gregory质量通量方案对大尺度环流背景场的预报也较Kuo方案好。从整个夏季的预报来看，Gregory参数化方案能较Kuo方案更好地模拟出1998年的降水的总体趋势，尽管Gregory方案模拟的降水与实况相比，仍然存在着系统性的误差，还需要进一步改进。
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| 关 键 词： | 积云 1998年 中国 夏季 洪涝灾害 数值模拟 降水预报 |
A Comparative Study of the Numerical Simulation of the 1998 Summer Flood in China by Two Kinds of Cumulus Convective Parameterized Methods |
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| PING Fan,GAO Shouting,WANG Huijun.A Comparative Study of the Numerical Simulation of the 1998 Summer Flood in China by Two Kinds of Cumulus Convective Parameterized Methods[J].Advances in Atmospheric Sciences,2003,20(1):149-157. |
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| Authors: | Fan Ping Shouting Gao Huijun Wang |
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| Institution: | Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029,Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029,Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The NCC T63L20 model of the National Climate Center, China Meteorological Administration isemployed to simulate the 1998 summer flood, which mainly occurred in the region of the Yangtze River andNortheast China. For this study, two kinds of cumulus convection parameterized schemes are employed inthis model respectively. The simulations show that the Gregory parameterized scheme, which is still usedin the United Kingdom Meteorological Office routine model, simulates more reasonable rainfall amountand distribution compared to the Kuo-type scheme. Moreover, the Gregory scheme better simulates thetendency of general circulation than the Kuo-type scheme. On the whole, the Gregory scheme providesa good simulation of the main features of the seasonal precipitation and general circulation in China,although the simulated result still exhibits some departures from the observations. |
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| Keywords: | cumulus convection numerical simulation parameterized scheme the heavy flood |
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