The water cycle is accelerating

In 2000, through the atmosphere was more water than in 1950, which means that part of the salty oceans become more salty and fresh — even more fresh.

Darek floor of the Lawrence Livermore National Laboratory (USA) and his colleagues concluded that the increase in surface temperature half a degree of evaporation increases by 4% — more than the given previous research. Accordingly, the area of the oceans, where evaporation predominates become more saline, and then dominated precipitation — more fresh.

Such measurements have never been easy. Sensors distributed over the surface of the planet is extremely uneven. In addition, it is usually impossible to determine the exact position of the instrument, which measured the evaporation and precipitation for decades. Finally, it is difficult to compare, because there are more data.

The salinity of the ocean — a more stable and reliable way to determine how much water is in the atmosphere rises and falls. Moreover, small fluctuations in the usually smooth out, which simplifies the selection of long-term trends.

Group Mr. Dareka took into account the 1.7 million salinity measurements made from ships in the second half of the XX century. Dynamics of changes in data over time is already known, but a new study detailed the picture, because they were considered as buoys installed in the XXI century. They helped fill in the gaps, especially in high latitudes, where during the winter storms do not go court.

What is happening in the ocean, is significant not only for the ocean. Dry areas (eg, Australia) will become even drier and wet should prepare for more heavy rains.

The study is published in the journal Science.

Prepared according ScienceNews.


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