Mediterranean tragedies are the result of heatwaves

The video footage from Libya is shocking. The number of dead is unimaginable. And so is the suffering associated with it. Experts say that the heavy rainfall events, which also hit other Mediterranean countries such as Greece, Bulgaria and Turkey hard and brought the amount of rain that normally falls in half a year within a few hours, were a consequence of this summer's heatwaves. Storm Daniel, which raged in the eastern Mediterranean, turned into a so-called Mediterranean hurricane, or Medicane for short, and drew its energy from the particularly warm Mediterranean Sea. But not only here, similar scenes are currently unfolding in many parts of the world: Spain, Hong Kong, California, Brazil.

 

In an interview with riffreporter, ZDF meteorologist Özden Terli said that storms were predictable after the extreme heatwaves in the Mediterranean. In Greece, up to 1,000 liters per square meter fell within a few days in some places, and up to 700 liters in others, on the barren, parched ground, turning the landscape into huge lakes and raging rivers. In Hong Kong, 156 liters per square meter poured down in just one hour. For comparison: 500 to 700 liters is the annual amount in this country.

 

You can't really prepare for that. You can only leave the area and flee.

ZDF meteorologist Özden Terli

 

We don't know whether there was a timely warning in Greece. In Libya, people were surprised by the masses of water that burst two dams and flooded the city of Derna several meters high. As the ground was unable to absorb these masses in such a short time, it collected in the river basins and poured onto the plains.

 

Last week, we measured rainfall that has never been seen before in Europe. In some cases, it was many times more than what we had here during the Ahr valley flood.

Climate researcher Mojib Latif on Bayerischer Rundfunk

 

 

But why does this heavy rain form?

 

This is due to the extremely high surface temperatures of the oceans worldwide. Climate change is probably the main reason for this. The heatwaves, which we have already written about several times, are warming the water. As a result, more water evaporates and the atmosphere becomes more humid. Extremely high surface water temperatures have been measured in many places this year and the El Nino weather phenomenon is reinforcing this trend. For example, record temperatures of 38.9 degrees Celsius were measured in Florida's coastal waters. Records were also set in the North Atlantic, Mediterranean and Pacific this year.
"With every degree warmer, the air can absorb up to seven percent more moisture."
ZDF meteorologist Özden Terli
"When colder air warms up over the Mediterranean, absorbs moisture and rises, very high clouds can form. This cloud formation releases energy that can lead to violent thunderstorms," explains riffreporter. The warm water acts as an energy booster that fuels the thunderstorms.

https://news.pro.earth/2023/05/03/wissenschafter-alarmiert-ueber-rasche-weltmeererwaermung-vor-el-nino/

 

It was clearly foreseeable

Whenever a low forms and cold air flows towards the Mediterranean, we have to assume that it will lead to flooding and extreme weather events somewhere. These Mediterranean lows are particularly intense in the fall and are an "explosive concoction", says climate expert Latif, and are also responsible for the natural disaster in Libya.
"That will probably be unavoidable. And to be honest, we talked about it weeks ago during the heatwave because it was clearly foreseeable. It actually happens every year. But when the Mediterranean is particularly warm, the effects are particularly strong or even extreme," says Terli in the riffreporter interview.

Will this become the norm?

"Climate change doesn't just mean higher temperatures, but above all means more extreme weather, more potential for damage and, above all, a huge challenge for people in terms of health," explains Latif, adding that people can adapt to a certain extent. But there are also limits: "With such masses of water, what else do you want to do?"

"What we're seeing with the storms in Greece is that the global phenomenon is breaking down into a local event. We've already had a few extremes this year. The North Atlantic is also extremely warm and unfortunately we have to fear that something bigger is going on. The fact that such a huge area is warming up to such an extent is unprecedented in the data recorded so far. That's really worrying," says Terli.

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