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題 名 | 地勢效應對MM5耦合之水文模式模擬的影響=Effects of Topographic Slopes on Hydrological Processes in the Penn State-NCAR MM5-LSM Modeling System |
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作 者 | 禚漢如; 古一男; | 書刊名 | 環境保護 |
卷 期 | 27:1 2004.06[民93.06] |
頁 次 | 頁90-105 |
分類號 | 351.8 |
關鍵詞 | MM5模式; OSU水文模式; 水文過程; 地勢效應; OSU-land surface model; Hydrological processes; Topographic slops; |
語 文 | 中文(Chinese) |
中文摘要 | 在最近幾年來,陸地表面作用過程和其模式化的方法,在全球及區域性中尺度氣候數值模擬模式上,漸漸被廣泛的認為是重要且必須的。然而在MM5耦合由奧勒岡州立大学發展出的陸地表面水文數值模擬模式(Oregon State University land surface model之後簡稱OSU-lsm),並未考慮地勢對水文過程的效應。在真實情況下,地表上水量分佈應會受到地勢傾斜影響而流動。因此我們將會加入地勢效應,修正表面逕流水量分佈狀態。由三種不同物理情境模式下相互比較(純MM5模式、MM5耦合OSU-lsm水文模式、MM5偶合OSU-lsm水文地勢效應修正模式),發現到OSU-lsm水文模式可以彌補MM5模式在陸地表面水文作用上,所忽略地表和地底水含量對能量收支的影響。接著由OSU-lsm水文模式加入地勢效應修正跟OSU-lsm水文模式相互比較,可以發現OSU-lsm水文地勢效應修正模式使得表面水量會因為地勢而外流,使模式模擬地表水量分佈更為合理化,跟著地表表面能量通量也發生變化,進而修正模式預報。 |
英文摘要 | It has been widely accepted that land surf ace processes and their modeling play an important role, not only in large-scale atmospheric models, but also in regional and mesoscale atmospheric models. In the Penn State-NCAR fifth-generation Mesoscale Model (MM5) has its origins at the Oregon State University land surface model (LSM). But in the MM5-LSM, hydrological processes that the horizontal distribution of surf ace water should be depended on the topographic slopes were not included. Topographic slopes will cases outflow from higher topography to lower. Then the horizontal distribution of surface water and the soil moisture should be changed. So, we wish to address this aspect of the problems. We will compare results between the third kinds of different physical state's simulations (the MM5's simulations, the MM5-LSM's simulations and the MM5-LSM's simulations with topographic effect). we fin d that the LSM can improve the simulation of the surface energy balance with add soil moisture to the MM5.Then the horizontal distribution of surface water and the soil moisture will be more realistic in the MM5-LSM's simulations with topographic effects. Therefore the surface energy fluxes will be different, including both the sensible an d latent heat fluxes. Thus it is expected the modifications will not only affect the weather simulations but also the climate simulations. |
本系統中英文摘要資訊取自各篇刊載內容。