From the Industrial Revolution onwards, humans have been burning fossil fuels to provide energy for our machines, and this has increased the level of carbon dioxide in the atmosphere. Methane, a waste product from food digestion, is another of the problem greenhouse gases. Heat trapped in the lower atmosphere has the potential to raise the temperature of the lower atmosphere and to alter weather patterns. This can lead to hardship for millions of people. It is vitally important that we have accurate information on the atmosphere to give us warning of any changes that might be occurring.
Gravity waves provide transport for energy from the lower atmosphere to the middle atmosphere.
Gravity waves are generated by weather systems, air flow over mountains, and many other tropospheric sources. You can sometime see their effects in the sky, collections of bands in clouds are a typical trademark of these waves. The breaking of these gravity waves transfers energy from one area to another. In winter the mesopause is hot and in summer cold. This is because of dynamic transport of energy.