Features of the Baiu Front Simulated in an AGCM (T42L52)
スポンサーリンク
概要
- 論文の詳細を見る
The simulation studies of the Meiyu-Baiu front, by global climate models, have not been performed in depth. A few experimental studies show insufficient precipitation in the Meiyu-Baiu front, without the detailed analysis on circulation systems in and around the Meiyu-Baiu front. In the present report, we study features of the Meiyu-Baiu front and associated circulation systems simulated in the climatological SST run by the T42L52 model (the maximum zonal wave-number is 42 in triangular wave transformation, and the number of the vertical level is 52) in comparison with the features described in observational studies. The Baiu front is not properly reproduced in the monthly averaged field for June and July. This is due to the alternation of relatively short "Baiu phase" and the longer "non Baiu phase". In the "Baiu phase", the large-scale circulation systems, such as the cut-off cyclones and blocking ridge in the northern latitudes, westward extending Pacific Subtropical anticyclone, monsoon westerly, and subtropical jet stream, are properly maintained. Only under this large-scale condition, a realistic Baiu frontal zone is formed in the model. The structure of the Baiu front, the features of precipitation, and the thermal stratification around the frontal zone are reasonably reproduced. In contrast, in the "non Baiu phase", features in the large-scale field are significantly different from the observed features in the break period, while the continent-ocean thermal contrast is reasonably maintained. Judging from the results, the formation of the Baiu front does not only depend on the direct local effects of physical processes, and continent-ocean thermal contrast, but depends on the maintenance of large-scale environmental circulation systems favorable to sustain the Meiyu-Baiu front.
- 社団法人日本気象学会の論文
- 2002-08-26
著者
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Matsumura Shinji
Frontier Research Center For Global Change Japan Agency For Marine-earth Science And Technology
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Ninomiya Kozo
Frontier Research Center For Global Change Japan Agency For Marine-earth Science And Technology
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NISHIMURA Teruyuki
Frontier Research Center for Global Change, Japan Agency for Marie-Earth Science and Technology
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SUZUKI Tuneaki
Frontier Research Center for Global Change, Japan Agency for Marie-Earth Science and Technology
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Ohfuchi Wataru
Frontier Research System For Global Change:(present Address)earth Simulator Center
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Suzuki Tuneaki
Frontier Research Center For Global Change Japan Agency For Marine-earth Science And Technology
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Nishimura Teruyuki
Frontier Research Center For Global Change Japan Agency For Marine-earth Science And Technology
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Ninomiya Kozo
Res. Inst. For Global Change Japan Agency For Marine-earth Sci. And Technol.
関連論文
- The Impact of Cumulus Suppression on the Baiu Front Simulated by an AGCM
- Synoptic- and Meso-a-Scale Variations of the Baiu Front Simulated in an AGCM
- Similarities and Differences among the South Indian Ocean Convergence Zone, North American Convergence Zone, and Other Subtropical Convergence Zones Simulated Using an AGCM
- Multi-Scale Features of the Meiyu-Baiu Front and Associated Precipitation Systems(125th Anniversary Issue of the Meteorological Society of Japan)
- Synoptic-Scale Variations in the Polar Air-Mass Transformed over the Japan Sea
- Polar-Air Outbreak and Air-Mass Transformation over the East Coast of Asia as Simulated by an AGCM
- Multi-scale Interaction Processes Associated with Development of a Sub-Synoptic-Scale Depression on the Meiyu-Baiu Frontal Zone
- Cloud System Families in the Meiyu-Baiu Front Observed during 1-10 July 1991
- Large λ-shaped Cloud Zone Formed around July 6, 1991 with Pole-ward Moisture Transport from Intense Rainfall Area in Meiyu-Baiu Front
- Polar Low Genesis over the East Coast of the Asian Continent Simulated in an AGCM
- Generation and Development of a Polar Mesoscale Cyclone over the East Coast of Asia as Simulated in an AGCM
- Features of the Baiu Front Simulated in an AGCM (T42L52)
- Similarity and Difference between the South Atlantic Convergence Zone and the Baiu Frontal Zone Simulated by an AGCM
- Features of the Polar Air Outbreak and the Energy Balance in the Transformed Air-Mass Observed over the Japan Sea
- Comments on "Analytical and Numerical Studies of a Quasi-Stationary Precipitation Band Observed over the Kanto Area Associated with Typhoon 9426 (Orchid)" by Hiromu Seko et al. (J.Meteor.Soc.Japan, Vol.77, 929-948)
- Differences between the Intense Precipitation Associated with Subsynoptic-Scale Baiu Frontal Depression Simulated by an AGCM and Described in Observational Studies
- The North Pacific Subtropical High Characterized Separately for June, July, and August : Zonal Displacement Associated with Submonthly Variability