Detection Of Gravity Waves Essay

3462 WordsMar 21, 201214 Pages
Detection and analysis of gravity waves using UWOSCR Instrumentation Department of Experimental Physics, TABLE OF CONTENTS Chapter Contents Page 1 Introduction 2 1.1 Description 2 1.2 Sources of waves 3 2 Background 4 2.1 Projective objective 4 2.2 Method 4 3 Procedure 5 3.1 Project resources 5 3.2 Method 5 4 Problems encountered 7 5 Work ahead 8 6 Results and discussion 9 | | Introduction 1 Description An atmospheric gravity wave, sometimes called buoyancy waves, is a movement of air and which has its source in the troposphere. These waves can be caused by convection, jet imbalance and airflow over topography and they occur between any stable layers of differing densities. These waves need a trigger mechanism and the original lifting force for the waves is buoyancy, while the restoring force is gravity. The momentum of the air which has been imparted by the trigger mechanism will force a parcel of air to rise and this upsets the equilibrium of the system. Since the fluid is a continuous medium, to close approximation, a travelling disturbance will occur. The natural tendency of the air is to sink back down, but its momentum causes it to overshoot that equilibrium position. Subsequently gravity tries to restore equilibrium, and oscillations then initiate, which propagate as gravity waves. A special type of gravity wave is a surface wave, which are the waves seen on the surface of a body of water. One way to understand the physical characteristics of gravity waves is to visualize a corrugated sheet moving through a fluid such as air. The air is forced to oscillate and as this corrugation forces its way through the air, the wave will propagate away. [1] Diagram showing the physical properties of gravity waves 2 Sources of waves Atmospheric gravity waves have a role in

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