The last 15 years confirm that the Mediterranean is becoming radicalized

This weekend the map of the southeast of the peninsula has turned red again. The maximum alerts issued by the AEMET in the Valencian Community and in Almería it has returned us to a reality that seems to repeat itself with a disturbing cadence. And this is precisely the question we can ask ourselves in this case: are these events of a more usual way? In a short way. What the data tells us From the last 15 years of analysis, it is yes. The long answer is more complex and involves a Mediterranean that works like gasoline increasingly volatile for these phenomena. What the data says. If we look back, the perception that ‘it used to rain, but not like this’ has very important scientific support. The analyzes carried out by the AEMET on extreme rainfall between 1965 and 2020 show a fairly clear pattern: storms with torrential rains are not only more frequent, but are more extensive and violent in the 21st century. The turning point seems to be in the last decade. The 2010-2020 period concentrates an anomalous number of extreme events, with the storm glory in 2020, setting previous records that the DANA of 2024 has pulverized. Furthermore, recent publications in EarthArXiv and compilations of Copernicus confirm this trend: the Spanish western Mediterranean is suffering an intensification of convective episodes. It is not a cycle. It is something that may come to mind, thinking that this is a streak that may be cyclical and that in the future the frequency may be decreasing. But the reconstructions dendrochronological based on tree rings they indicate that the intensity of the Levant events is outside the natural variability observed in previous centuries. The engine of disaster. To understand why we have more violent storms now, we have to go back to basic thermodynamics, since the Mediterranean is registering unprecedented surface temperatures. This made, for example, the Valencia DANA of 2024 to be between 12 and 15% more intense than this anthropogenic climate change. The equation used by the World Meteorological Organization (WMO) is relentless: For every degree the atmosphere warms, it can retain 7% more humidity. Something that directly affects meteorological events. The example. When a DANA that It’s literally a layer of cold air. At altitude it encounters an unusually warm Mediterranean, the result is a massive injection of water vapor. This is what Millán, historic director of CEAM, had been warning for years: we have turned our maritime basin into a pressure cooker. In this way, warming not only provides more water to precipitate, but also intensifies the force with which it does so and therefore greater destruction. The future. What is worrying is not only what has happened, but what the models say is going to happen. The projections cited by experts indicate an increase in up to 61% in extreme rains in the Mediterranean region under high emissions scenarios. Reports from the University of Zaragoza and AEMET indicate that, although the total number of rainy days could decrease in the future, the days that it rains will do so torrentially. Specifically, for the coasts of Valencia and Alicante, they are projected increases greater than 20% in intensity of extreme precipitation. This forces us to prepare containment plans that have us prepared for possible natural disasters. Images | Jason Sung In Xataka | Something strange has happened in the stratospheric polar vortex. And it is a hint of the winter that awaits Spain

radishes confirm the entry of nanoplastics into the food chain

Living with microplastics It seems like the new normal in our diet. We already see them in things as everyday as bottled water either tapbut also within our body as in breast milk or their own testicles. Now the researchers, who remain very focused on the food chain, have wanted analyze its presence in crops and it has made it clear that the problem is more serious than we thought. The study. Published in the magazine Environmental Researchresearchers have used a technique of radiolabeling to demonstrate, for the first time quantitatively, that nanoplastics are not only absorbed by plants, but travel through them until they accumulate in the parts we eat. And the results, obtained with radishes, are a wake-up call to a very important food safety problem. The marking. The main challenge of studying nanoplastics in biological tissues is to distinguish them from the organic material that surrounds them. To overcome this obstacle, a team of scientists from the University of Plymouth in the United Kingdom synthesized polystyrene nanoplastics and “marked” them with a radioactive isotope: lime. famous carbon-14. In this way, it was possible to accurately monitor the movement of the plastic inside the plant. And precisely the material is more common in agricultural soils. Design. The experiment was meticulously designed to avoid any type of surface contamination. For this, radishes were used due to their rapid growth and their large fleshy root (the edible part), which were introduced into a hydroponic system with a liquid nutrient solution instead of being in their normal habitat, which is soil. This is where the key is: only the fine, non-fleshy roots were in contact with the water containing the nanoplastics. In this way, the edible part and the sprouts were never in contact with the contaminated medium. From here, the radishes were left for five days to absorb the solution and subsequently analyzed to check if the nanoplastics (which emit radiation) had been absorbed and what path they would follow. Results. After the passage of these five days, radioactivity was detected in all parts of the silver that had been exposed, demonstrating the absorption and transport of the nanoplastics. In total, the radishes managed to retain almost 5% of the nanoplastics that were in the water and of these, 65% remained in the non-fleshy roots (the entry point). But the alarming thing comes when in the part that is edible, a concentration of 25.5% of the nanoplastics that the plant had absorbed and transported to this area was found. Even the buds and leaves, the furthest part, accumulated almost 10% of the total absorbed. What does it mean. This finding demonstrates that polystyrene nanoplastics are capable of crossing the Caspary bandan impermeable layer of cells that functions as a protective barrier in the root of the plant, designed precisely to prevent the passage of unwanted substances into the vascular system. Once this barrier is overcome, the nanoplastics have free rein to distribute throughout the rest of the plant. Why it is important. These results open a direct and quantifiable pathway for human exposure to nanoplastics through diet. Unlike animals, which have rapid excretion mechanisms (such as feces or urine) to eliminate part of the contaminants, plants lack these systems. This makes them potential “sinks” for nanoplastics, accumulating them throughout their lives. And for humans, the fact that these particles are so small means that they can diffuse our biological barriers and enter the body to circulate through the bloodstream. Although the effects that these microplastics have on our body still remain to be known, something that is currently still being studied to know exactly their distribution throughout the body. Future research should explore whether other types of plastics behave the same, how soil type affects absorption, and what happens in longer growing cycles. But the door has already been opened: smaller plastics are no longer just pollute our oceans and air, but they have found a way to silently sneak into our food, from the roots. Images | Teslariu Mihai Marc Pell In Xataka | They clean your blood of microplastics for 11,500 euros: the startup that capitalizes on our fear of an invisible enemy

Confirm that the summer of 2025 is the warmest since there are records is not enough. You have to understand why. And you have to do it fast

Astronomical summer is not over yet and it seems that the weather coincides with this, although we have already entered the month of September. However, experts from the State Meteorology Agency (AEMET) have already taken stock of the summer quarter of this year. We knew that this summer had been warm, but now we know that it has been the warmest. Since we have records. The summer of 2025 has been the warmest of the historical series in Spain (in 1961), according to has released recently Aemet. In peninsular Spain, the quarter between June and August has left us a thermal anomaly of 2.1º Celsius, taking as reference the period between 1991 and 2020. This year’s has also been a very warm summer on the islands: 1.5º above what would be common in Balearic Islands and 0.9º more in the Canary Islands. In the Peninsula, “excess heat” has been distributed quite homogeneously, although in important areas of the territory of communities such as Galicia, Castilla-La Mancha, and Castilla and anomalies of more than 2.5º were seen. According to Explain Aemetit was precisely in Galicia and the two plateaus where anomalies of more than 3º are observed. Overcoming the record. The warmest summer until now had been the 2022. The new record exceeds the marking during that summer in just 0.1 and supposes the fourth consecutive year in which positive anomalies are recorded during the summer, always taking as reference the period between 1991 and 2020. June, the most anomalous month. A good part of the situation is due to the heat that We live in the month of June. The first month of this summer was not only the warmest June since there are records, it was also the 30 days with the greatest warm anomaly of which we have record: 3.6º Celsius. During that month the heat was especially concentrated in the east of the country, with a small area between Aragon and Catalunya exceeding 4.5º of thermal anomaly. What happened this summer? Summer was marked by a low atmospheric circulation, with anticyclonic conditions that allowed the intrusion of African heat in almost all of the peninsula. According to Aemet, this summer we saw three waves of heat, two that affected Peninsula and Balearic Islands, and another that reached the Canary Islands. The peninsular affected 40 provinces and lasted for 17 days, from June 18 to July 4. The Second heat wave It was still more intensegenerating an anomaly of 4.2º; It affected 42 provinces and lasted for 16 days, between August 3 and 18. Both heat waves were among the longest we have registered and turned 2025 in the second year with more days with active heat waves (33) after 2022 (41 days). And what about the rains? In addition to warm, summer this year has been dry, at least in peninsular Spain. They saw each other on average 57 mm of rain In the area, 81% of what would be common on these dates. The southwest quadrant was the most affected by the lack of rains, although rainfall was rather scarce in most of the country, except for some areas of the Ebro basin, center of the northern plateau, and some areas of the Mediterranean basin. The situation was unequal in the Balearic Islands, with the western part of the archipelago seeing few rainfall and the eastern area watching a more humid summer. Even more irregular what was seen in the Canary Islands, where together there was a wet summer (133% of the average rainfall for summer), but with very concentrated rainfall in specific areas. In Xataka | We have centuries studying the different types of clouds. What tells us the shape and color of these atmospheric phenomena Image | ECMWF / Victor of Dompablo

The only way to confirm the signs of life on Mars is to bring the rock to the earth: there are three great volunteers

NASA’s Rover Perseverance has given us one of the most exciting news of recent years. In an old river bed in the Jezero crater, he has found a rock that could contain, In the words of NASA directorone of the “clearest signs of life we ​​have seen on Mars.” Baptized as Cheyava Falls, the rock has dark deposits whose chemical, mineral and textural characteristics, on earth, are associated with microbial life. But scientists cannot be safe from here. Unless… Mars Sample Return. Perseverance did his job: in July of last year he identified a place of very high scientific interest, analyzed the rock with its instruments and, most importantly, pierced a core of the rock and kept it in a sealed sampling tube. This little treasure, along with 29 other sampling tubes, waits patiently on the Martian surface. The problem is that, however advanced the instruments of the rover are, they have their limits. To confirm if those possible “biofirmas” are the product of old microorganisms or geochemical processes without biological intervention, there is only one solution: bringing samples to the earth to analyze them in our laboratories. And this is where The plans collide with a hard reality. The plan to collect these samples, the ambitious Mars Sample Return mission, has been de facto canceled waiting for a cheaper and faster solution. Truncated due to lack of budget. NASA’s original plan to collect the 30 samples of the Perseverance Rover was to send a ship to the surface of Mars, that a small rocket would take off with the samples (delivered by Rover itself or by a drone) and that an orbiter (in this case, contributed by the European Space Agency) to bring them back home. The project ended up becoming a bottomless well. According to an external audit, the budget shot up to 11,000 million dollars with an estimated date for 2040. The situation reached such an extent that the US administration He proposed to cancel Mars Sample Return for his excessive budgetprioritizing other programs such as Artemis to return to the moon. NASA was forced to put the project in pause and look for faster and more cheap alternatives. A career to counterreloj. Time runs against NASA. Not only for the potential historical value of these samples, but because China plans to launch its own sampling mission in 2028. Tianwen-3 is a simpler mission, which would not bring selected rocks but from the ground where the probe landed, but that would return to Earth in 2031. It would be a Sorpasso symbolic in full rule, advancing the United States in a milestone that had at hand. Before the collapse of its official plan and the probable symbolic defeat, NASA did what has been best given in recent years: to look at the private sector. The agency Explore two paths simultaneously: one based on public technology already tested, such as the “Sky Crane” landing system of Curiosity and Perseverance, and another open to “new commercial capabilities.” Voluntary companies. They haven’t taken to appear. Lockheed Martin has put on the table a groundbreaking proposal: executing the mission For less than 3,000 million dollars and under a fixed price contract, which means that it would assume any extra cost. Your plan is based on reusing and adapting technology already tested in missions such as Insight and Osiris-Rexwith a simpler and more light architecture than the original Mars Sample Return. Another of the great candidates is Rocket Lab, a company that, despite its youth, also has experience on the red planet: its components travel aboard Perseverance and other missions. Your proposal is to send a probe to collect the samples and send them to the Martian orbit and a second probe to bring them to the earth, with a third probe called Telecommunications Orbiter for Mars (MTO) that not only would support the mission, but would serve as a basis for future manned missions, establishing a robust communications network between Mars and the land that Rocket Lab could exploit commercially for decades. And Spacex? NASA It does not rule out using starship as a vehicle to bring to the Martian surface all the necessary equipment. If Elon Musk fulfills its ambitious deadlines, Starship could offer an unprecedented load capacity to an unbeatable cost. The final decision on which path is expected for the second half of 2026. What is clear is that NASA is at a crossroads. The samples collected by Perseverance have the potential to confirm that on Mars there was extraterrestrial life. But to find the answer, you must first bring them home. And the solution may not be in a public program, but in companies that have offered to do the job for less than half. Image | Rocket Lab In Xataka | Perseverance has found what, according to NASA’s director, is “the clearest indication of life we ​​have seen on Mars”

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