Weather forecasting by two-level model

Abstract

The purpose of this thesis is to study weather forecasting by applying a two-level model to forecast the weather in the domain area between 90E to 180E longitudes and 0 to 45N latitudes. The grid size is 2.5° longitudes / 2.5° latitudes forming a total of 38 x 19 points. The streamfunctions are assumed to be constant at the north and south domain boundary and cyclic continuity at the east-west domain boundary. The 200 hPa and 850 hPa wind data from European Centre for Medium Range Weather Forecast are used as initial values for 24-hour, 48-hour, 72-hour and 96-hour forecasts. The prototype-model can be used with a micro-computer. The experimental results show the model ability for weather forecast. They show an arising, a movement, and the changing of circulation with continuous changes of streamfunction patterns.