A glaciation more than 80 million years ago in Barrika, Bizkaia, has put climate models in doubt
This discovery would reject the possibility of an ice-free Earth planet in the Cretaceous, and break with the idea that it is rooted in the scientific community c that the climate of that time was extremely warm, to the point of being one of the highest temperatures in the history of the planet.
An international team of 16 researchers from Spain, the United Kingdom, France and the United States, led by Juan Pedro Rodriguez-Lopez of the University Institute for Environmental Science Research (IUCA) of theUniversity of Zaragoza (Unizar), has found that there was a glaciation in the cliffs of Barrika (Bizkaia) during the Cretaceous – 82.8 million years ago and 80.96 million years ago – which has forced a rethinking of past climate patterns because they are "very low" latitudes.
This discovery would thus refute the idea that it is deeply rooted in the scientific community: that in the Cretaceous, and in general in the Mesozoic -- between 252 and 66 million years-the Earth lived in a state of 'super-greenhouse', with a very warm and ice-free climate, and reached one of the highest temperatures in history, according to Unesco.
TheBarrika Glaciation, identified on the cliffs of Bizkaia , shows irrefutable evidence of 'tidewater glacier' or 'tide glaciers' at very low latitudes, around 35 ° N, just during the period when it is one of the hottest Mesozoic models.
The ice fronts of these glaciers sailed directly into the ocean for 1.84 million years, and large icebergs were released directly from the front of the glaciers into the sea water. These blocks of ice and the dynamics of the glaciers themselves left glacial deposits between 82.8 and 80.96 million years in northern Iberia.
Paradigm shift
"300-255 million years ago, no evidence was found of glaciers reaching the sea from the icehouse of the Permic Carboniferous," explains Juan Pedro Rodriguez-López. In the case of Barrika, the discovery is "a paradigm shift that forces us to question the very basis of paleoclimatic models , at least in the Mesozoic. "
"The data documented in the barrel require a thorough assessment of the paleoclimatic indicators currently used, and the geochemical instruments used to reconstruct past temperatures suggest a systematic overestimation of Cretaceous paleotemarma, "the researcher said.
This is important, because understanding these past events depends on the accuracy of future projections of global climate change.
Thus, Barrika's research provides critical data for refining global paleoclimatic models and understanding the Earth's system's response to extreme global warming conditions.
You might like
A 36-year-old Basque mountaineer was seriously injured in Asturias when a rock fell as he climbed
Apparently, the stone has fallen about 300 metres above where the woman was, who has suffered severe head trauma and has been transferred to the Asturias General University Hospital (HUCA).
Hundreds of people received the Freedom Flotilla ship in the Basque Country
He plans to stay in the Basque Country until Tuesday, the 8th, when he will leave for Vigo and then continue to other areas of the Mediterranean. During the ship's stay in Bilbao, various events have been organised, including conferences, performances, a Palestinian fair and a press conference with activists from the flotilla.
A 25-year-old woman has been arrested in Elciego on charges of running over her partner
He has been charged with attempted murder in the area of domestic violence. The incident took place around 7.30 a.m. on Saturday morning. The detainee has been transferred to police stations and, once the proceedings have been completed, will be brought before the court.
A 20-year-old boy died on Lekeitio's Geese Day after falling off a fence; the celebration was suspended
The young man, who was in the harbor following the test of geese, has fallen from a height of about two metres. Thousands of people have gathered in Lekeitio today and the event was developing normally until the accident.
Nearly 4,000 people have gathered at the Sagardo Eguna in Donostia
They have the opportunity to taste cider from 32 cider shops in Gipuzkoa. They have threatened the day with music from trikitilaris and bertsolaris. One of the most emotional moments has been the act of tribute to Jabier Ansorena and Marian Matas.
September 5th has been declared Local Democratic Memory Day in Irun
The Irun City Council has declared 5 September as Local Democratic Memory Day, with the support of all the political groups of the City Council, which today commemorated all the Iranians who suffered a military coup, war and dictatorship.
The Ertzaintza arrested a man in Urduliz accused of throwing bottles at three people
The attack took place at around 6.20 p.m. near the metro station, where a group of some 200 people had gathered in the vicinity, and the detainee had previously been arrested for similar events.
Three people have been arrested in Gernika on charges of forcing a 14-year-old pregnant girl to marry
An investigation is also under way into a 17-year-old, the alleged father of the child, who has not been located.
Tests on the Mole's underground passage trains begin next week
The infrastructure will be available by Christmas, according to the forecasts of the Basque Government.
The alleged perpetrator of Barakaldo's murder is still at the police station awaiting testimony before the judge
The Ertzaintza continues to investigate, and early hypotheses suggest that "sentimental" may be the cause of the incident.