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Climate, Arctic began to warm up in early 20th century, ‘much earlier than we thought’ – study by Italian researchers

The first signature is that Tommaso Tese, researchers from the Institute of Polar Sciences at Cnr in Bologna. And again there is that of Francesco Mochitello, from the Cambridge Department of Geography and more Stefano Miserucci, as well as from CNR and other signatures of Italian researchers. they are authors The High Atlas along the Fram Strait at the beginning of the twentieth century, a purpose Published in the magazine Science It could change the way we know the history of our planet’s climate. The study shows that since the beginning 900 Arctic water temperatures have risen by two degrees. A disturbing fact, given that the models most used in the scientific field to date predicted an increase in Arctic temperatures that began after the first decades of the last century.

To better explain this phenomenon, Francesco Muschitiello released a series of statements to CNN: “The Arctic Ocean has warmed much longer than previously thought. This is concerning for many reasons, especially because the climate models we use to make predictions about the future weather changes They did not expect this data. Moreover Rong ChangAn American researcher working in Noaa’s Geophysical Fluid Dynamics Laboratory confirmed these theses: “It is important to understand the reason for this rapid atlas, as well as the discrepancies between model simulations and reconstructions that we know now.” By painting we mean the infiltration of the waters of the Atlantic Ocean into the Arctic currents.

Sediment analyzes to reconstruct the history of the seas

To access the study’s findings, the researchers analyzed marine sediments collected from the Fram Strait, a stretch of sea that separates the Svalbard Islands from Greenland. These deposits are natural records capable of retaining information on climate change for centuries. Here the researchers saw that the water temperature remained at the same levels until 20th century: Here she suddenly began to rise to today’s levels. For Moshetilo, it is not yet clear what role man played in these phenomena: «We are talking about the early years of 1900, and since then we’ve charged the atmosphere with carbon dioxide. It is possible that the Arctic Ocean is more sensitive to greenhouse gases than previously thought.”

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