NASA has predicted the rainy Land of the future
As the heat of the planet’s rainfall in tropical regions will increase. According to a new study, the existing climate models incorrectly predict a number of these precipitation because it does not include a reduction in high-altitude clouds over the tropics, the recent observations of NASA. Details can be found in Nature Communications.
High-rise clouds capture heat in the atmosphere, but due to global warming of such clouds becomes smaller. This leads to a cooling of the tropical atmosphere and increase rainfall. The fact is that when water evaporates it becomes water vapour and rises into the atmosphere, it carries heat energy, which evaporates. But when steam reaches the cold upper atmosphere, he condenseries in liquid drops or ice particles, releasing heat and warming the atmosphere.
When the temperature of the surface of the Earth experience global shifts of air flow, which lead to the decrease in the number of high-altitude tropical clouds. Such air currents are called the General circulation of the atmosphere and include a wide area of the rising air flow centered on the equator. Observations over the past 30-40 years has shown that as climate warming, this area is narrowed, causing a reduction in high-altitude clouds.
Scientists from laboratory of jet movement NASA have compared the climatic data obtained over the last few decades, from 23 climate models of the same period. It turned out that most climate models underestimate the rate of increase in precipitation for each degree of the surface warming that occurred in recent decades.
The researchers noted that the new data will help them to improve climate models.