Abstract
The vertical velocity, ω, and the diabatic heating were computed at 800, 600, 400 and 200 mb surfaces using the Omega equation. The highest contribution to ω is from the diabatic heating produced by condensation associated with the precipitations appearing to be the main source of diabatic heating. The net radiative cooling and the thermal advection in the upper troposphere over the warm anticyclone result in diabatic cooling over the eastern part of the Bay of Bengal and adjoining northern and eastern regions.
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Abbreviations
- C p :
-
Heat capacity at constant pressure
- f :
-
Coriolis parameter
- g :
-
Acceleration due to gravity
- P :
-
Atmospheric pressure
- Q :
-
Diabatic heating rate per unit mass
- R :
-
Gas constant of air
- S :
-
Static stability parameter
- t :
-
Time
- U, V :
-
Zonal and meridional wind components
- α:
-
Specific volume
- ξ:
-
Relative vorticity
- η:
-
Absolute vorticity
- θ:
-
Potential temperature
- ϕ:
-
Geopotential
- ω:
-
Vertical velocity (dP/dt)
- ω1 :
-
Adiabatic vertical velocity
- ω2 :
-
Vertical velocity due to certain forcing
- ω3 :
-
Diabatic vertical velocity
- ▿:
-
Isobaric gradient operator
- ▿2 :
-
Laplacian operator
- J(A, B) :
-
Jacobian operator
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Singh, U.S., Singh, R.K. Vertical motion and diabatic heating over the Indian monsoon region during the Bay of Bengal depression of 5–8 July, 1979. PAGEOPH 138, 115–133 (1992). https://doi.org/10.1007/BF00876717
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DOI: https://doi.org/10.1007/BF00876717