Open AccessSimulation of winter and summer climates with PRL Atmospheric General Circulation Model
Author(s) -
Biju Thomas,
S. V. Kasture,
S. V. Satyan
Publication year - 1999
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v50i4.1952
Subject(s) - climatology , environmental science , atmospheric circulation , atmospheric sciences , convection , planetary boundary layer , general circulation model , forcing (mathematics) , meteorology , climate change , geology , geography , oceanography , turbulence
A global, spectral Atmospheric General Circulation Model (AGCM) has been developed indigenously at Physical Research Laboratory (PRL) for climate studies. The model has six a levels in the vertical and has horizontal resolution of 21 waves with rhomboidal truncation. The model includes smooth topography, planetary boundary layer, deep convection, large scale condensation, interactive hydrology, radiation with interactive clouds and diurnal cycle. Sea surface temperature and sea ice values were fixed based on climatological data for different calender months.
The model was integrated for six years starting with an isothermal atmosphere (2400K), zero winds initial conditions and forcing from incoming solar radiation. After one year the model stabilizes. The seasonal averages of various fields of the last five years are discussed in this paper. It is found that the model reproduces reasonably well the seasonal features of atmospheric circulation, seasonal variability and hemispheric differences.