The Arctic is warming faster than expected

Arctic warming may exceed all estimates. An alarming note related to the phenomenon of Arctic amplification.

The Arctic has warmed nearly four times faster than the rest of the world in the past 40 years: These conclusions from a new study raise fears of underestimating climate models for the poles, whose warming dramatically affects sea-level rise.

The study published in the journal Earth and Environment Communications From the Nature collection, it significantly reassesses the rate of warming in the region around the Arctic. In 2019, the UN Panel of Climate Experts (IPCC) estimated that the Arctic is warming”More than double the global average‘, as a result of a region-specific operation. This phenomenon is calledArctic amplificationIt occurs when sea ice and snow, which naturally reflect the sun’s heat, melt into seawater that absorbs more solar radiation and heats up.

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Although scientists have long agreed to observe the acceleration of warming in the Arctic, their estimates of the phenomenon vary depending on the period they choose to study or determine the geographical region of the North Pole, in one form or another. In the new study, the researchers, based in Norway and Finland, analyzed four sets of temperature data collected across the entire Arctic Circle by satellite since 1979 — the year the satellite data first became available.

They concluded that the Arctic has warmed at a rate of 0.75 degrees Celsius per decade, about four times faster than the rest of the planet. Due to greenhouse gases from human activities, particularly fossil fuels, the planet has already gained nearly 1.2°C since the pre-industrial era. “The scientific literature considers the Arctic to be warming at twice the rate of the rest of the planet, so I was surprised that our conclusion was much higher than the usual figure.‘, explains to AFP, Ante Lipponen, member of the Finnish Meteorological Institute and co-author of the study. However, the study found significant local differences in the rate of warming within the Arctic Circle. Par exemple, le secteur eurasien de l’océan Arctique, près de l’ archipel norvégien de Svalbard et celui russe de Nouvelle-Zemble, s’est réchauffé de 1,25 C° par décennie, soitron sept fois plus vite que le reste from the world.

melting ice

The team found that the most advanced climate models predicted a warming of the Arctic by about a third less than their data shows. This discrepancy, in their opinion, can be explained by the obsolescence of previous models of the Arctic climate, which are constantly being improved. “Perhaps the next step is to look at these models, and see why they don’t predict what we see in the observations and the impact that has on future climate projections.You are Lebonin. Extreme warming in the Arctic, in addition to the serious impact on local populations and fauna, which depends on the persistence of sea ice for fishing, will also have global repercussions. “Climate change is man-made, and as the Arctic warms its glaciers will melt, affecting global sea levels“Remember, you are Lebonine.”Something is happening in the Arctic and it will affect us all‘, is worried.

The melting of the ice sheet is the main driver of sea level rise, before glaciers melt and the ocean expands due to rising waters. The melting of the ice pack (ice on the oceans) does not cause sea level to rise. According to the Intergovernmental Panel on Climate Change, the sea level has risen by 20 cm since 1900. However, the rate of this rise has almost tripled since 1990, and depending on this scenario, the oceans could gain another 40 to 85 cm by the end of the century. Greenland ice sheet, which can approach “turning pointFrom the melt according to recent studies, it contains an amount of glacial water capable of raising the level of the Earth’s oceans by up to six meters.


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