Harvard scientist says we are five years old to save ourselves from climate change



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James Anderson, the Harvard scientist known to have linked CFCs to the erosion of the ozone layer, quickly warned carbon pollution to bring the climate back to an earlier state observed at the same time. Eocene time: there was no ice on the poles. Shutterstock

The level of carbon in the atmosphere has not been observed for 12 million years, said a Harvard scientist in Chicago on Thursday, and this pollution has the effect of quickly bringing the climate back to its current state. Eocene time. million years, when there was no ice on both poles.

"We have exquisite information about this state because we have a paleo disk many millions of years old, when the Earth had no ice at one or the other pole. There was almost no difference in temperature between the equator and the pole, "said James Anderson, professor of atmospheric chemistry at Harvard University, best known for & nbsp;establishment& nbsp; that chlorofluorocarbons damage the ozone layer.

"The ocean was almost 10 ° C warmer than today," Anderson said of this former and future climate, "and the amount of water vapor in the atmosphere would have meant that the systems Storm would be extremely violent, because the water vapor, exponential function of the water temperature, is the essence that feeds the frequency and intensity of storm systems. "

People have the bad idea that we can get out of this state simply by reducing carbon emissions, Anderson said. in an appearance at the University of Chicago. The recovery is almost impossible, he argued, without a World War II type of industry transformation: accelerating efforts to end carbon pollution and remove it from the world. Atmosphere, and a new attempt to reflect sunlight away from the poles of the Earth.

This has already been done, Anderson added, in the next five years.

"The likelihood of permanent ice remaining in the Arctic after 2022 is essentially zero," Anderson said 75-80% of the permanent ice had melted in the past 35 years.

"Can we lose 75 to 80% of the permanent ice and recover? The answer is no."

The answer is no, partly because of & nbsp; what scientists call feedback, including how Earth reacts to global warming. These reactions include the release of methane currently trapped in permafrost and under the sea, which will increase warming. The other is the imminent collapse of the Greenland Ice Sheet, which, according to Mr. Anderson, will raise sea level by 7 meters (about 23 feet).

"At this point, people have not realized the irreversibility of this sea level rise problem," Anderson said, displaying a map & nbsp; which shows the Harvard site new Allston campus of $ 10 billion flooded after 3 meters of sea level rise. He followed this map with & nbsp; images of Manhattan reduced by invasive waters and Florida & nbsp; misses its southern tip.

"When you examine irreversibility and study the numbers, it is the moral problem that prevents you from sleeping at night." Anderson said.

The moral question

Professor James Anderson of Harvard, best known for his work connecting chlorofluorocarbons to the hole in the ozone layer, warned against the irreversibility of climate change at an onset on Thursday. 39, University of Chicago.

Harvard

Anderson received the & nbsp; 2016 Chicago Benton Medal for Distinguished Service& nbsp; partly for the scientific contribution & nbsp; which led to the Montreal Protocol, to the 1987 international agreement on & nbsp; mitigate & nbsp; the damage to the ozone layer. He said Thursday that the physical sciences should take responsibility for & nbsp; prevent environmental disasters in the same way that biological sciences aim to cure cancer.

In universities, that means that & nbsp; connect & nbsp; the study of the physical sciences to global issues such as climate change, government ethics, public policy and other relevant practices.

Thursday in Chicago, he pursued a moral argument involving university administrators who refuse to separate from fossil fuels, journalists who do not verify the facts, false statements of political candidates and leaders of fuel companies fossils that continue their activities. that exacerbate climate change, especially those that & nbsp;mislead the public about these effects.

"I do not understand how these people sit down to have dinner with their children," Anderson said, "because they are not stupid people."

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James Anderson, the Harvard scientist known to have linked CFCs to the erosion of the ozone layer, quickly warned carbon pollution to bring the climate back to an earlier state observed at the same time. Eocene time: there was no ice on the poles. Shutterstock

The level of carbon present in the atmosphere has not been observed for 12 million years, a Harvard scientist said in Chicago Thursday, and this pollution quickly brings the climate back to its state of the art. Eocene times, there are more than 33 million years. when there was no ice on one of the poles.

"We have exquisite information about the nature of this state, because we have a paleo disk many millions of years old, when the Earth had no ice at one or the same. Another pole: There was almost no difference in temperature between the equator and the pole, "said James Anderson. , professor of atmospheric chemistry at Harvard University, known to have established that chlorofluorocarbons damage the ozone layer.

"The ocean was almost 10 ° C lower than today," said Anderson about this unique and future climate, "and the amount of water vapor in the ocean. The atmosphere would have meant that the storm systems would be violent in the extreme, because the water vapor, exponential function of the water temperature, is the essence that feeds the frequency and the intensity of storm systems. "

People have the bad idea that we can recover from this state simply by reducing carbon emissions, said Anderson in an appearance at the University of Chicago. The recovery is almost impossible, he argued, without a World War II type of industry transformation: accelerating efforts to end carbon pollution and remove it from the world. Atmosphere, and a new attempt to reflect sunlight away from the poles of the Earth.

This has been done, Anderson added, in the next five years.

"The probability that there will be permanent ice in the Arctic after 2022 is practically zero," Anderson said, with 75% to 80% of the permanent ice already melting in the last 35 years.

"Can we lose 75 to 80% of the permanent ice and recover? The answer is no."

The answer is no, partly because of what scientists call reactions, some of the ways Earth reacts to global warming. Among these reactions is the release of methane currently trapped in permafrost and under the sea, which will exacerbate the warming. The other is the imminent collapse of the Greenland Ice Sheet, which, according to Mr. Anderson, will raise sea level by 7 meters (about 23 feet).

"At this point, people are not aware of the irreversibility of this sea level rise problem," said Anderson, displaying a map showing the location of the new Allston campus of Harvard, endowed with $ 10 billion, flooded after 3 meters of sea level rise. He followed this map with Manhattan images narrowed by invading waters and Florida missing its southern tip.

"When you look at irreversibility and you study the numbers, it's what keeps you up at night, with the moral problem," Anderson said.

The moral question

Professor James Anderson of Harvard, best known for his work connecting chlorofluorocarbons to the hole in the ozone layer, warned against the irreversibility of climate change at an onset on Thursday. 39, University of Chicago.

Harvard

Anderson received the Benton 2016 Distinguished Public Service Medal from Chicago, in part for contributing to the science that led to the Montreal Protocol, the 1987 International Agreement to Mitigate Damage to the Layer 39; ozone. He argued on Thursday that the physical sciences should take responsibility for preventing environmental disasters in the same way that the biological sciences set out to cure cancer.

In universities, this means that the study of the physical sciences must be linked to global issues such as climate change, government ethics, public policy and other relevant practices.

On Thursday, in Chicago, he pursued a moral argument involving university administrators who refuse to part with fossil fuels, journalists who do not verify the facts, false statements from political candidates and leaders of the same party. Fossil fuel companies that continue to exert activities exacerbating climate change – especially those that mislead the public about these effects.

"I do not understand how these people sit down to have dinner with their kids," Anderson said, "because they're not stupid people."