Systematic errors of IMD Operational NWP model

Authors

  • S. K. ROY BHOWMIK

DOI:

https://doi.org/10.54302/mausam.v55i1.852

Keywords:

Limited area model, Model biases, Systematic errors

Abstract

The systematic errors of IMD (India Meteorological Department) limited area model over Indian region using 48 hours forecast fields for winter and  summer seasons are examined in this paper. The study reveals that the core of the sub tropical westerly jet and tropical easterly jet are well simulated in the zonal component of wind. In case of meridional component of wind significant difference is noticed between forecast and analysis. In the upper tropospheric levels (above 100 hPa) northerly biases are noticed. Thermal structure of the model exhibits cool bias in middle and lower tropospheric levels over the northern latitudes. The nature of model biases of the geopotential height changes with the season. Model drying over the tropical belt and moistening towards the northern latitudes are found in all the seasons studied.

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Published

01-01-2004

How to Cite

[1]
S. K. ROY BHOWMIK, “Systematic errors of IMD Operational NWP model”, MAUSAM, vol. 55, no. 1, pp. 1–14, Jan. 2004.

Issue

Vol. 55 No. 1 (2004): MAUSAM

Section

Research Papers

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