Is a heatwave really a wave of heat?

A: A heatwave is not similar a question oregon pulse of vigor travelling done the air. The sanction astir apt comes from the mode a heatwave feels, arsenic thing that spreads, surges, and overwhelms earlier subsiding. Some meteorologists similar the squad “heat event” instead.

For example, successful April and May, the prima is astir straight overhead implicit astir of peninsular India, and the crushed heats for weeks. When a stable, high-pressure upwind strategy settles implicit a portion of the peninsula, aerial dilatory sinks down from higher successful the atmosphere, becoming compressing and warming. This suppresses the process that forms clouds, which allows sunlight to support beating down. In this time, the peninsula besides bears hot, adust continental winds from India’s interior alternatively than from the seas, which doesn’t travel acold inland. Finally, if the ungraded is dry, little vigor goes into evaporating h2o and much into heating the air.

When these conditions persist for a fewer days, a heatwave tin occur.

This said, ample undulations successful the pitchy watercourse called Rossby waves tin sometimes make high-pressure ‘domes’ of vigor that stagnate implicit an area. However, the vigor itself is not virtually a question moving done the air.

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