Change in climate could be major cause of rainfall in the tropical regionThe study conducted by NASA advises that the amount of rainfall in the tropical region will significantly increase with an increase in the temperature.  According to the research led by the scientists Hui Su of NASA’s Jet Propulsion Laboratory (JPL) in the U.S., rainfall is not only just related to the clouds that involve precipitation but also to the Earth’s “energy budget”. The energy budget is nothing but the amount of incoming energy from the Sun as compared to the outgoing heat energy.

Tropical clouds of higher altitudes trick more amount of heat in the atmosphere. If few clouds among these are left, the temperature of the tropical atmosphere will be quiet cool. Observing the patterns of cloud from last few decades, the atmosphere would create fewer high clouds in response to surface warming.

The process that takes place several kilometers up is something different. When the water from the surface of the Earth evaporates and rises high up into the atmosphere, it carries the heat energy as well which made it evaporate. After going up when the water vapor condenses into liquid droplets or ice particles, it releases its heat and warms the atmosphere. It decreases downs the high tropical cloud cover in context as one result of a planet-wide shift in large-scale air flows that is occurring as the Earth’s surface temperature warms.

Observing the environment of the atmosphere from last 30 to 40 years shows that this area is narrowing day-by-day as the climate warms, causing the decrease in high clouds. Researchers from different universities compared the climate data taken from past few decades with 23 climate model simulations of the same period. Climate modelers practice retrospective simulations to pattern how resourcefully their numerical models are able to reproduce observations. For collecting the climate data, they made use of outgoing thermal radiation from NASA’s space borne clouds and the Earth’s Radiant Energy System (CERES) and other satellite instruments along with ground-level observations.

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