Global warming is accelerating the rainfall cycle. Free Technical Library News

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Global warming speeds up the rainfall cycle

13.05.2012

Australian scientists have been studying changes in ocean salinity for 50 years and have found signs that global warming has accelerated the rainfall cycle.

The study, published in Science, provides data on ocean salinity around the world from 1950 to 2000. It turns out that the salinity of the ocean has changed over the past 50 years, and the hydrological cycle of the planet has noticeably intensified. In other words, the water cycle (evaporation and precipitation) over the oceans has accelerated. Most likely, this also happens over land.

What are the implications of these changes for the climate? Unfortunately negative: the atmosphere carries more water from regions that are already drying up to regions where there is already enough rain. This means that dry regions will dry out even more, and wet regions will be flooded with rain.

Until now, this problem has been little studied, since most of the observations relate to the land of the Northern Hemisphere of the earth, while most of our planet is covered by oceans.

The oceans are actively responding to global warming. Computer simulations by the Australian government science agency CSIRO and the Livermore National Laboratory in California have shown just how dangerous accelerating the water cycle can be. There is a gradual process, which is expressed in the following: the salty parts of the ocean become more salty, and the fresh ones become more fresh. Today this phenomenon is observed in the north and south of the Atlantic, in the north and south of the Pacific Ocean, in the Indian Ocean. Scientists suggest that it is global in nature - there are simply too few observations.

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