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Instability Predicted in Alicante Weather

Written by on May 14, 2018

A report from the Climatology Laboratory warns that storms with a lot of water can be frequent in a month normally summery

In the last 35 years there have only been four months of May like the current one.

A report from the Climatology Laboratory of the University of Alicante warns that the atmospheric instability presiding over May will continue until June, so it will be usual for the province to have atypical days with sun and heat one day, and unexpected storms during the same day, in an extraordinary conjuncture that did not occur for ten years, in particular since May 2008. The reason is that between January and March, and in direct relation to climate change, there was a sudden warming of the stratosphere over the North Pole. An increase in temperature that causes the cold air of the Arctic to descend to lower latitudes “latitudes where the Iberian Peninsula is,” as explained yesterday by Jorge Olcina, director of the Climatology Laboratory at the University of Alicante.

Ten years ago that in Alicante there was not a month of May so unusual because they are situations that do not occur frequently (May was hot in 2015, 2016 and 2017). To find a month of May like the current one, we would have to go back to 2008, 2004, 1990 and 1984.

Rains in these cases always exceed 40 liters per square meter and even exceed 50 and more liters, and rainy days range between 10 and 15 days of the month. The average rainfall in the province for the whole month of May is 30 liters per square meter, according to statistics from the State Meteorological Agency.

Jorge Olcina explains that in this atypical May there is a relevant fact. “After the process of sudden warming of the stratosphere over the North Pole between January and March, the atmosphere takes time to readjust and return to its normal state. Hence, since the end of winter and what we have in spring, the unstable days have been more frequent than normal. ”

This heating is produced by the stagnation of a warm air mass in high layers, which is positioned on the cold air of the Arctic itself. And in these conditions the cold air descends towards lower latitudes, that is to say, toward middle latitudes, where Spain is. “This is why there have been more invasions of polar and arctic air masses than usual in March, April and May, due to the atmospheric imbalance that has caused the sudden warming of the stratosphere over the North Pole in the Northern Hemisphere. » When it stops occurring, the atmosphere takes between 4 and 8 weeks to return to normal. So we still expect days of instability in May, with showers and storms.

Jorge Olcina, director of the Laboratory of Climatology of the University of Alicante, has clear that Alicante lives years of uncertainty in everything related to the evolution of the climate. We perceive that the climate that we live in recent years is not the same as two or three decades ago. And it begins to worry us, because it can affect our economy, our health, our territory, according to Olcina.

There is a series of indications, verified by the scientific data, that indicate that something is changing. “The average temperature in the province has gone up 0.6 degrees since 1980. Especially the minimum night temperatures have done it, and not because of the so-called” urban effect “, but because of the accumulated heat in the lower layers from April to November, especially in the Mediterranean Sea. Even the rainfall has changed their patterns, “says Olcina.

There are no clear trends in the quantities, but changes in their distribution in the seasons and in the form of rain. It rains less in spring and more in autumn. And it rains more and more intensely or torrentially. Therefore, rains little usable and that generate economic damages. The province supports more mud rains than thirty years ago and that indicates that the arrival of Saharan air in low layers is increasingly frequent on our territory.

In short, we are losing climatic comfort and we suffer the extreme character of the atmospheric manifestations that form the story of our climate. Reflections by Jorge Olcina, who confirm a situation that could even become a problem for “European Florida”.

Given this, there is only one way for Jorge Olcina: Recognize what is happening, accurately report everything that is known, promote climate research, policies and practices to adapt to what may come in the coming decades, and propose climate change as an opportunity that Alicante has to reorient its agricultural, industrial and tourist activities. “In fact, there are already good examples in the province of initiatives that are taking, anticipating the facts sensibly. In this task we are all citizens and administrations, “underlines Olcina, president of the Spanish geographers.

Article courtesy: Diario Informacion

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