A Study of the 22 February 1993 TOGA COARE Squall Line : A Case Used for the GCSS Model Intercomparison
スポンサーリンク
概要
- 論文の詳細を見る
Numerical experiments are performed to get a better understanding of the three-dimensional structure of a squall line system under an environmental wind that was observed on 22 February 1993, and used for the GCSS (GEWEX Cloud System Studies) model intercomparison (Redelsperger et al. 2000). The primary objective of this study is to clarify the effects of the observed environmental wind with directional shear on the squall line. More specifically, it is shown that the main features of the structure of the squall line under the observed wind can be explained more clearly by interpreting the wind as a superposition of a jet-type wind in the east-southeastward direction, and a wind with a low-level shear in the north-northeastward direction. For this purpose, numerical experiments are made not only with the use of the observed wind but also with a simplified wind mentioned above. In the latter case, two numerical experiments with, and without, the low-level north-northeastward shear are performed. These numerical experiments indicate that the low-level shear plays an important role on the observed location of enhanced convection at a leading edge, and that a stratiform cloud and pressure field are primarily explained by the jet-type wind. The properties of the squall lines obtained from the present model are also compared with those from the GCSS model intercomparison and other studies. A sensitivity of the properties of convective systems to different orientations of initial, roll-shaped buoyancy is also examined, with a focus on the role of the environmental wind as well as the self-organization mechanism of convection.
- 社団法人日本気象学会の論文
- 2004-10-25
著者
-
YAMASAKI Masanori
Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology
-
Yamasaki Masanori
Department Of Chemistry Faculty Of Science Kochi University
-
Yamasaki Masanori
Frontier Research Center For Global Change Japan Agency For Marine-earth Science And Technology
-
Yamasaki Masanori
Frontier Research System For Global Change
-
Yamasaki M
Department Of Chemistry Faculty Of Science Kochi University
関連論文
- A Study of the Mesoscale Structure of Typhoon Flo (T9019) : A Case of COMPARE Model Intercomparison
- A Numerical Study of Cloud Clusters and a Meso-α-Scale Low Associated with a Meiyu Front
- A Study of Fukui Heavy Rainfall in 2004
- A Tropical Cyclone Model Resolving Mesoscale Organized Convection with Prognostic Treatment of Subgrid-scale Cloud Water
- A Study of the 22 February 1993 TOGA COARE Squall Line : A Case Used for the GCSS Model Intercomparison
- ^1H and ^C NMR Detection of the Carbocations or Zwitterions from Rhodamine B Base, a Fluoran-Based Black Color Former, Trityl Benzoate, and Methoxy-Substituted Trityl Chlorides in the Presence of Alkali Metal or Alkaline Earth Metal Perchlorates in Ac
- Characterization of a Mixed-Anion Salt, Bacl(ClO_4), Isolated from Acetonitrile Solution
- The Direct Effects of Alkali Metal and Alkaline Earth Metal Perchlorates on the Equilibria of Acid-Base Indicators (Sulfonephthaleins) in Acetonitrile Solution
- A Study of Cloud Clusters Associated with a Baiu Front by Use of a Mesoscale-Convection-Resolving Model
- A Representation of Cumulus-scale Effects in a Mesoscale-Convection-Resolving Model for Tropical Cyclones
- An MJO-like Gravity Wave and Superclusters Simulated in a Two-Dimensional Cumulus-Scale-Resolving Model under a Warm Pool Condition
- A View on Tropical Cyclones as CISK(125th Anniversary Issue of the Meteorological Society of Japan)
- A Study of the Mesoscale Convective System under Vertical Shear Flow in the Latently Unstable Atmosphere with North-South Asymmetry