The warming of the North Atlantic, which occurs from the end of the 1990s, has led to an increase in summer precipitation in the UK by a third, according gazetaThe Guardian.
Summer 2012 in the UK was the wettest in the last hundred years, the abundance of rainfall caused in some areas devastating landslides and floods, disrupted rail and cause problems with the supply of electricity.
Experts from the University of Reading (UK) analyzed data on temperature of the North Atlantic, as well as meteorological data in the country over the past 100 years. According to them, the cause of moisture weather that ocean warming in the North Atlantic triggered a shift to the south of the atmospheric system (the North Atlantic Oscillation — NAO), generating rainfall in the turning of the air and moisture. That is, as the study authors explain, caused an increase in precipitation in the UK by a third since the late 1990s.
However, experts point out that this is a cyclical process, and the temperature of ocean water changes every few decades. According to the authors, Professor Rouvena Sutton (Rowan Sutton), "switching" cycles can occur suddenly, for two or three years — and then the next summer in the UK can become dry, with almost no rainfall.
"Most likely, this change should be expected soon, and now we are working to determine the time when there will be another shift," — said Sutton, whose words are quoted by the newspaper.
According to the study authors, such fluctuations in ocean temperatures and humidity of the climate took place the previous few centuries, however, due to global warming effects in the form of adverse weather conditions occur, apparently, stronger than before.
The study is published in the journal Nature Geoscience.
The North Atlantic Oscillation is a periodic change in atmospheric pressure with the mutual influence of constantly "pulsing" Icelandic Low (cyclone) and the Azores anticyclone. Changes in the pressure difference between the two areas affected by the strength of the winds over the North Atlantic, which largely shape the weather in Northern Europe.