Simulation of the 1998 East Asian Summer Monsoon using the Purdue Regional Model(<Special Edition>Regional Climate Modeling for Monsoon System)

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概要

• 論文の詳細を見る

• This study used the Purdue Regional Model to simulate the 1998 EASM to assess the model performance. The results indicated that the model was capable of simulating the overall characteristics of the 1998 EASM on the seasonal, intraseasonal, onset, and daily time scales. On the seasonal time scale, the model tended to produce more precipitation over the land and less precipitation over the ocean. This land-sea contrast in the model performance was consistent with the stronger-than-observed Pacific anticyclone in the simulation. It appears that the over simulated anticyclone was also found in other models, and is not a unique problem to the PRM. Future studies are needed to tackle this seemingly fundamental problem in several regional models. The model simulated the seasonal march of the EASM well, characterized by northward-propagating rain bands. Intraseasonal oscillation events propagating northward were also well reproduced. These results confirm that the model is capable of producing realistic sub-seasonal variability in the inner domain, once the proper lateral boundary forcing is provided. The model correctly simulated the onset timing and dramatic changes before and after the onset. However, the model incorrectly simulated the circulation and precipitation during the onset, because it failed to simulate the rapid development of a weak trough in the northern South China Sea. After the onset period, the model performance became reliable again. This indicates that the model is capable of fixing the existing large biases, with the proper lateral boundary forcing. This model was able to simulate the gross fluctuation in the regional-averaged daily precipitation, although it missed some extreme events that resulted in flooding in China. The incorrect simulation of these extreme events was partially responsible for the biases in the simulated seasonal precipitation. It is suggested that a regional model should be able to simulate the multi-scale features from the daily to seasonal time scales and their mutual interaction to correctly simulate the monthly and seasonal mean fields.

• 社団法人日本気象学会の論文
• 2004-12-25

著者

• HSU Huang-Hsiung

  Department of Atmospheric Sciences, National Taiwan University

• Hsu H‐h

  National Taiwan Univ. Taipei Twn

• Hsu Huang-hsiung

  Department Of Atmospheric Sciences National Taiwan University

• Sun Wen-yih

  Department Of Earth And Atmospheric Sciences Purdue University

• YU Yi-Chiang

  Department of Atmospheric Sciences, National Taiwan University

• KAU Wen-Shung

  Department of Atmospheric Sciences, National Taiwan University

• HSU Wu-Ron

  Department of Atmospheric Sciences, National Taiwan University

• TSOU Chi-Hua

  Department of Earth Sciences, National Taiwan Normal University

• Hsu Wu-ron

  Department Of Atmospheric Sciences National Taiwan University

• Tsou Chi-hua

  Department Of Earth Sciences National Taiwan Normal University

• Yu Yi-chiang

  Department Of Atmospheric Sciences National Taiwan University

• Kau Wen-shung

  Department Of Atmospheric Sciences National Taiwan University

関連論文

• Eddy Energy along the Tropical Storm Track in Association with ENSO
• Sub-Monthly Circulation Features Associated with Tropical Cyclone Tracks over the East Asian Monsoon Area during July-August Season
• Simulation of the 1998 East Asian Summer Monsoon using the Purdue Regional Model(Regional Climate Modeling for Monsoon System)
• The relationship between the Tibetan Plateau heating and East Asian summer monsoon rainfall
• Northward and Northwestward Propagation of 30-60 Day Oscillation in the Tropical and Extratropical Western North Pacific
• Stratospheric Antarctic Intraseasonal Oscillation during the Austral Winter
• Numerical Study of the 1988 Drought in the United States(Regional Climate Modeling for Monsoon System)
• A One-dimensional Time Dependent Cloud Model

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