“Our results underscore the urgency of limiting global warming to less than 1.5℃, in order to avoid the most catastrophic climate damage,” warn the authors of this study. “Warming waters and rising sea levels could damage marine life and threaten coastal human settlements,” they add.

Water getting hotter

To reach this conclusion, the researchers studied on-site data for 90 years. And so they discovered that the temperature of the waters has constantly increased, even rising by 0.3ºC to 0.9ºC per decade since 1990. The rise in temperatures linked to global warming obviously causes this warming of the waters. But not only. Global warming also has an impact on the direction of the wind which brings warmer waters to new areas of the world.

Rising sea levels

“It is well known that the West Antarctic ice sheet is melting and contributing to sea level rise. But until now, much less was known about its eastern counterpart. How this basin will respond to climate change is one of the greatest uncertainties in projections of sea level rise this century. If the basin melted entirely, global sea levels would rise by 5.1 meters. On the other hand, we did not know that warmer waters would manage to make their way to this glacier, which we thought was nevertheless partly preserved from climate change, unlike the ice cap of West Antarctica, ”conclude the researchers.

The largest glacier in the world is in danger: its melting could produce unprecedented events

the largest glacier in the world is in great danger. Located in the heart of Antarctica, the East Antarctic ice sheet, which is more or less equivalent to the United States, would be surrounded by increasingly warm waters. This opens the possibility of the melting of its ice. An event that could have tragic consequences for the planet.

“Our findings underscore the urgency of limiting global warming to below 1.5℃, to avoid the most catastrophic climate damage,” warns Laura Herraiz Borreguero, the study’s lead author. “Warming waters and rising sea levels could damage marine life and threaten coastal human settlements,” she said.

The oceanographer at the Australian National Science Agency (CSIRO) also explains that this discovery is different from others. “It is well known that the West Antarctic ice sheet is melting and contributing to sea level rise. But until now, much less was known about its eastern counterpart,” he says. -she. “How this basin will respond to climate change is one of the biggest uncertainties in projections of sea level rise this century. If the basin melted entirely, global sea levels would rise by 5.1 meters. On the other hand, we did not know that warmer waters would manage to make their way to this glacier, which was nevertheless thought to be partly preserved from climate change, unlike the ice cap of West Antarctica.

Indeed, global warming is at the root of this possible future catastrophe. Even if its impact is less direct than one might think. Global warming, with the increase in concentrations of greenhouse gases in the atmosphere, has changed the direction of the winds. “As a result, westerly winds approach Antarctica in summer, bringing warm water with them,” says Laura Herraiz Borreguero.

No, NASA didn’t claim global warming was a fraud

Publications widely relayed on Twitter (HERE and HERE) suggest that NASA has confirmed that “global warming is a fraud”. These publications are accompanied by the following comment: “For those who believe in man-made global warming…” with the capture of a 2019 tweet from a user and a link to an article that dates from 2016 (HERE) . According to these Internet users, there would be no global warming and no consequences of human activities on the climate. Climatoscepticism then. However, NASA claims just the opposite.

NASA studies on Antarctica

The article shared by the Internet user in 2019 is taken from the site La Terre du Futur and was written in 2016. It relates well to a NASA publication from 2015 entitled: “the mass gains of the Antarctic ice sheet are greater than the losses” .

A detail calls out at the bottom of the article, the word of the editorial staff of the site La Terre du Futur: “Word of Tdf: Here it is a confirmation of the figures and not of the words of NASA. Figures confirm but NASA says nothing”.

According to the study, based on analysis of satellite data, the Antarctic ice sheet showed a net gain of 112 billion tons of ice per year from 1992 to 2001. This gain slowed to several billion tons of ice. ice per year between 2003 and 2008. In short, Antarctica is gaining more ice than it is losing, but this gain is decreasing more and more. In its article summarizing the study, NASA does not at any time question the reality of global warming or the consequences of human activity on it.

A new NASA study published in 2018 reshuffles the maps of the previous one and confirms the acceleration of ice loss from the West Antarctic ice sheet. In total, the study found an overall ice flow for the Antarctic continent of 1,929 gigatonnes per year in 2015with an uncertainty of plus or minus 40 gigatonnes.

Where is it coldest: at the North Pole or at the South Pole?

THE SOUTH POLE MUCH COOLER THAN THE NORTH POLE

While the two poles share many similarities, these two geographically opposite places are different in many ways, including their geography, ecosystem and climate. Since these are the places that receive the least solar radiation on Earth, it goes without saying that the temperatures there are very cold. By the way, it is interesting to know that the sun never rises more than 23.5 degrees above the horizon in either pole.

This implies that these two places face six months of continuous darkness over the course of a year. In addition, most of the sunlight that shines on the polar regions is reflected by the shiny white surface, which makes the climate all the colder. But even though the polar regions both have very cold climates, one is much colder than the other. In effect, Antarctica (South Pole) has a much colder climate than the Arctic (North Pole)and there are several reasons for this.

THE MAIN REASONS CONCERN THE GEOGRAPHY OF THE TWO POLES

First, you should know that the average temperature at the North Pole in summer is 0°Cand of -28°C at the South Pole. In winter, the average temperature in the Arctic is -40°Cversus -60°C in Antarctica. The main reason for these large temperature differences is because the South Pole is a landmass surrounded by oceans, while the North Pole is an ocean surrounded by landmasses. Indeed, the Arctic region is dominated by the Arctic Ocean, which covers the far north of the globe.

This ocean is notably surrounded by several landmasses, including Norway, Russia, the United States, Canada, Denmark, and Iceland. In contrast, Antarctica is a continent completely surrounded by the Southern Ocean. It is quite isolated from the rest of the planet since the nearest continent is South America, which is about 1,000 kilometers from the South Pole. Altitude also plays an important role in the climatic difference observed between the two poles.

Indeed, Antarctica has a much higher average altitude than the Arctic. In addition, the Antarctic ice sheet is larger and thicker than the Arctic. In fact, about 90% of all the ice on the planet is in Antarctica. The second largest ice cap on the planet is Greenland, and it is in the Arctic. However, despite its considerable size, it is only one-eighth the size of the Antarctic ice sheet.