Record Details
 
  « New Search    
   
 
Bibliographic Data
Control Number255392
Date and Time of Latest Transaction20141223084911.AM
General Information141223s |||||||||b ||00|||
Cataloging SourcePAGASA-DOST
Language Codeeng
Local Call Number551.51 5.13 So7i 1992
Main Entry - Personal NameSoriano, Jr., Bernardo M.
Title StatementInfluence of environmental conditions of tropical waves by Bernardo M. Soriano, Jr
Physical Descriptionxxi, 151 l. illus., figures, tables
Summary, Etc.The dependence of the structure and intensity of tropical waves on the vertical profiles of the basic state is studied. A two-dimensional version of the primitive equations in cartesian (x,z) coordinates is integrated to determine the effect of the vertical profiles of the basic zonal wind, the initial temperature and the initial humidity. Microphysical processes are included by use of conversion equations for cloud water, water vapor and rain water. In general, the numerical model is initialized by prescribing a perturbation in the temperature field of 1 degree K over a horizontal distance of about 60 km from the center and from the surface up to the 900m ( ~900 hPa) level. Results of experiments without the prevailing zonal wind indicate that the structure and intensity of the wave are influenced more by the vertical profile of the initial perturbation temperature. The depth of the trough and the strength of the winds around the upper level ridge during the early periods are found to be directly proportional to the position of the perturbation temperature. The intensity of the winds around the trough seems to depend on the magnitude of the perturbation temperature and the humidity of the troposphere during these periods. The wind patterns at these times may be the result of the approximate geostrophic balance condition that is assumed at the inital time. When the other forces become significant, the structure of the wave becomes more or less similar in all cases while the intensity of the winds is still a function of the initial perturbation temperature and initial humidity. The wave structure and intensity are greatly influenced by the vertical profile of the mean zonal wind also during the early periods, i.e. the trough and ridge axes tend to lean towards the direction of the vertical shear of the zonal wind component. However, in the latter periods, the axes incline toward the direction of the prevailing zonal wind which likewise determine the rate and direction of propagation of the wave. The prevailing zonal flow reduces the intensity of the winds around the wave throughout the integration period. The winds seem to intensify near the lateral boundaries possibly due to the increased horizontal diffusion, which is specified at four grid points near it, and to the no-gradient boundary condition there and zero vertical advection at the top boundary. In general, however, the simulations seem to agree with the results of Kurihara and Kawase (1985) and the observations of Reed and Recker (1971) and Thompson et al. (1979)
Subject Added Entry - Topical TermWaves -- tropical waves -- environmental conditions of tropical waves -- 1992 -- Quezon City
 Meteorology
LocationDOST PAGASA 551. 515. 13 So7i BOOKS thesiscab PAG-07-1238 1 858 Complimentary 2008-04-11
  
     
 
Physical Location
Department of Science and Technology
Philippine Atmospheric, Geophysical and Astronomical Services Administration551. 515. 13 So7i
  
     
 
Digital Copy
Not Available
  
     
  |  Download MARC record Download MARC
 
         
         
Online Catalog
Basic Search
Advanced Search
Browse Subjects
Book Cart
 
         

Text Size:
S  -  M  -  L
Copyright © 2004-2024. Philippine eLib Project
Host: U.P. Diliman University Library