For a month of June, these are considerable values. Similarly, While we barely enter the summer. Furthermore, the Mediterranean is overheating not unprecedented in absolute terms, but never seen so early in the season.
This Sunday, June 29, the surface temperature was the hottest ever recorded for a month of June: 26.01 ° C on average, according to data from the European Copernicus program analyzed by Météo France.
Off the coasts of the Alpes-Maritimes and Var, it is still a notch above. Nevertheless, “We observe temperature anomalies that exceed +4 to +4.5 ° C. Furthermore, in the Ligurian area, Describes Jean-Pierre Gattuso, research director at the CNRS (Sorbonne University) attached to the Villefranche-sur-Mer oceanography laboratory. Nevertheless, This Sunday, the average temperature [de la zone] was 27.25 °Cor 4.9 degrees above averages from 1982 to 2015. Consequently, It is completely exceptional. In addition, “it completely exceptional”: mediterranean records “
During the last two summers, “We have already reached higher temperature values”. In addition, The Mediterranean continues to record alarming records.
August 15, 2024 marked the hottest temperature ever recorded on a day: 28.90 ° C, exceeding the previous record, 28.71 ° C on July 24, 2023.
+0.4 ° C per decade – "it completely exceptional": mediterranean records
Now the month of June 2025 followed the step of these extraordinary statements. Moreover, without hope of short -term inversion. Moreover, “For July 7, that is to say next Monday, 28.6 ° C are anticipated, which would therefore be 5.4 ° above the averages.” This heat wave is therefore “Exceptional from the point of view of intensity and precocity”.
But spectacular peaks should not erase the substantive trend. Nevertheless, “We must put these values back in a context. Moreover, The gradual increase in average temperature, at the rate of 0.4 ° C per decade”continues Jean-Pierre Gattuso. “it completely exceptional”: mediterranean records However, Another sign of this global evolution. However, “Last year, the whole Mediterranean experienced a marine heat wave event at one time or another. For example, Everywhere”.
The French coasts are not the most exposed, the whole Italian boot is marked by overheating.
The mechanisms that lead to this warming are the subject of in -depth studies. In addition, “The first possible cause. Similarly, obviously, it is the temperature of the air, which is excessively high, and therefore necessarily it warms the surface of the sea”continues the scientist. Therefore, The second is the absence of wind.
From year to year – "it completely exceptional": mediterranean records
“In this case. Meanwhile, surface water does not mix, there is no brewing”prolongs Frédéric Gazeau, research director at the CNRS, at the head of the Oceanographic Laboratory of Villefranche-sur-Mer. Therefore, The more the upper layer warms up. Nevertheless, the more it “Thread”and the less it mixes with deeper and “it completely exceptional”: mediterranean records colder waters. Nevertheless, It is the image of an edited that heats, grows and gradually descends.
A researcher in marine ecology at Ifremer. a French institute dedicated to the sea, Stéphane Sartoretto experienced it during a recent outing at sea. “I was in diving at night Sunday evening. the water was 25 ° C of the surface up to 15m from the bottom.” What was more commonplace in summer, even in the early fall, occurs this year in June, “With a lasting peak … It is the meaning of the dynamics that we observe from year to year.”
The risk is “For marine organizations which cannot move. which will not bear the hot weather beyond 30 ° C”(read the effects on marine life).
Only a gale … – "it completely exceptional": mediterranean records
Only a gale could put a cold stroke in front of our ribs. “If a Mistral regime is put in place “it completely exceptional”: mediterranean records long enough. that is to say over several days and sufficiently strong, we could have temperature falls.” Vacationers sometimes experience it, when water cools down a dozen degrees in a few days.
But precisely. a large -scale atmospheric phenomenon currently causes “A system of high pressure on Europe, which limits the impact of depression from the North”decrypts Nicolas Reule, physicist at the Ifremer connoxless of the Air Ocean interactions.
A kind “Heat amplifier” is in place, directly in contact with the surface of the Mediterranean.
Of any surprise, but an emergency
Such a marine heat wave is in no way a surprise. The latest IPCC report. the intergovernmental group of experts in climate development, has documented the doubling of extreme events since the 1980s.
From here at the end of our century. “These extremes could still be multiplied by a 20 to 50 factor, so “it completely exceptional”: mediterranean records it’s absolutely not a surprisereacts the scientist Jean-Pierre Gattuso, contributor to several reports, notably on the ocean and the cryosphere. All that, unfortunately, was written. “
Since the concentration of CO2 in the atmosphere continues to increase. “We are on a trajectory among the worst that had been imagined in terms of the frequency of marine heat waves, their intensity and their extent.”
Hence his message could not be more direct: “We do not hear much about the imperative need to separate. from the use of fossil fuels. If you want to save the ocean. it is not by measures that we will do, you have to stop using fossil fuel, there is no hope otherwise.”
The gorgonians suffer. the jellyfish swarm
During the last marine heat waves in the Mediterranean, “We have been able to observe strong mortalities among fixed organisms, such “it completely exceptional”: mediterranean records as gorgonians, in particular the purple gorgone of the Mediterranean, an emblematic species which constitutes seabed very appreciated by divers”notes Sylvain Couvray, marine biologist at the Paul-Ricard Oceanographic Institute, in Embiez. “In fact, it is very visible, and therefore its mortality is also very visible. Other organisms such as sponges or even sea urchins are very sensitive to it too.”
The scientist notes that “When surface temperatures increase. these species cannot go and get the freshness in depth”…
A natural survival behavior which also finds new limits: “With the strong intensities of the latest marine heat waves, we have observed a new phenomenon: the waters are too hot, up to large depths … They exceed 20 degrees 30 meters deep, it is a real anomaly, they should be less than 14 degrees spent 20 meters …”
The risk of tropical invasive species
The marine biologist is also very concerned “it completely exceptional”: mediterranean records about “The frequency. intensity and duration of these heat waves, which only increase. All of this leads to rupture conditions for the sea ecosystem. The year 2025 could also break a record for precocity of the episode, already leaving to fear a new intensification …”
The phenomenon leads to a modification of biodiversity. For example. “Since the opening of the Suez Canal, the species from the Red Sea, warmer, remained confined to the mouth of the canal. Now they go up to our French coasts”.
Another clear effect of this warming: “The sea turtles. genetically programmed to lay the same beaches over the generations, have changed their instincts, going up more north, towards our coasts there too”observes Sylvain Couvray. “With an important mortality phenomenon, linked to human overfrequently.”
The jellyfish “Pully all year round. They are opportunistic and therefore invasive. And moreover they feed on larvae, in plankton, and therefore “it completely exceptional”: mediterranean records harmful to the regeneration of species.”
Another risk pointed out by the marine biologist. and not least: “New exotic invasive species, which did not settle down until then because the waters were too cold for them, could find favorable conditions to settle and spread … with maritime transport, the risk is significant”.
Infographic Rina Uzan.
“This is the first time that water has been as hot”
On the Garonne beach in Pradet. the 33 degrees encourage spending more time in the water than on its towel. But in a 29 degree bath, freshness lovers can get dressed. Beyond the discomfort potential, some swimmers share their environmental concern.
This is the case of Nathalie. resident of Valletta, who claims to be “concerned“: “I really feel the difference, compared to last year at the same period. It feels like mid-July “it completely exceptional”: mediterranean records in early August. There, the water is too hot! It’s worrying, just like the heat he is currently doing. “
A few meters further. the swimming club of the Amicale Laïque du Pradet organizes its traditional picnic at the end of the year. The opportunity – among others – to debate.
Pierre, he thinks of fauna. “”That it is so hot so early, it is not normal. This is the first time that the water temperature has been so high at this stage of the year. It is a critical situation for fish, it is very worrying. It doesn’t bother anything good. “
Jean-Luc. the association’s coach, believes on the contrary that “The situation is new“: “When François Mitterrand was elected president in May 1981, it was the heat wave, I remember it very well. It was very hot. the water temperature was so high that you could already “it completely exceptional”: mediterranean records take midnight baths “Says the man in the memory of elephant.
And then there are those who assume taking advantage of the situation, such as Élodie and Stéphanie.
“As long as the water is not at 28 degrees, we do not bathe, we are pure southerners!,, certify the two cousins. We are not worried, it’s like every year, right? We are just lucky to live here, it’s as if we were on vacation all year round.“
Autumn is a lifestyle journalist who shares tips on crafting, DIY projects, and fun ways to bring creativity into everyday life. Facebook Twitter Instagram
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