Contents
Signals and Systems in Meteorology
by
Sidharth Kumar
Saurabh Shrivastava
Priyesh Neema
Abstract:
In meteorology, short-term forecasts are the main application of radar data. In other fields, the radar data is generally used as a source of data that will help to perform other types of forecasts (like river flow). Short term forecasting of weather events that go beyond simple extrapolation follows several avenues, depending on the method used for forecasting. For example, work on convection initiation is being persuaded to establish radar-based algorithms to predict the outbreak of storms. Another approach is to try to assimilate radar data into numerical models, a process by which the initial conditions of a model are being modified until they can reproduce the storm evolution observed by radar, after which a forecast can be made.Other applications are many, and are primarily limited by the lack of knowledge of the capabilities of radar data. Hydrologists, both in rural (rivers) and urban (sewers) areas, are becoming natural users of radar data. Agriculture (from plant growth to pest control) and aviation uses (wind and severe weather detection) are also rapidly growing. Some of the important uses of radar in meteorology:
1.Short-term public weather forecasts.
2.Short-term forecasts for aviation.
3.River and sewer flow forecasting.
Motivation:
Radar is one of the rare instruments that can be used to observe the time evolution of weather events in three dimensions, and a unique tool to observe mesoscale events. The radar technology mainly evolved and improved during World War II. Radar was originally developed to satisfy the needs of the military. So, how this weapon can be used to determine weather. Further radar is not capable of recognizing the colours and other specifications of the object. So, how do such a simple thing, which can’t even differentiate between the basic colours, can be used to approximate the near future weather. The storm and flood warnings are issued in advance. So, how does meteorologists come to such big conclusion, using weather radars. This invokes curiosity to know about the matter and motivate us to take on this topic for this presentation.
