"Weather and climate information play an important role in shaping the countryâ€™s economic and strategic activities. India is emerging as global player in various sectors and it has resulted in the increase in demands for accurate weather and climate prediction for applications in various sectors. Weather forecasting research in data assimilation and, weather and climate modelling (short, medium and seasonal) using computer-based Numerical Weather Prediction (NWP) models is a well-established practice now, which is being spearheaded in India by the National Centre for Medium Range Weather Forecasting (NCMRWF). During the last two decades, the accuracy of weather prediction has improved significantly, with better understanding of the underlying physical and dynamic processes, quality and quantity of meteorological observations; especially from satellites and availability of progressively increasing computing power. Atmospheric modelling The concept of a unified modelling system for seamless prediction of weather and climate has gained importance and acceptance in recent times. An unified model (UM) and the associated 4D-VAR (four-dimensional variational) data assimilation system have been successfully implemented at NCMRWF. A regional version of the UM ha
A seamless approach across spatial and temporal scales using the earth system modelling framework is the key for providing realistic prediction of weather and climate. Ensemble based forecasting and data assimilation techniques are being used for estimating the uncertainty and providing probabilistic forecasts to end users.
The authors are director and scientist G at National Centre for Medium Range Weather Forecasting, New Delhi. firstname.lastname@example.org