Post by Andrei Tchentchik on Mar 1, 2020 14:32:10 GMT 2
(.#A.045).- America. GIEC, alarming report on global warming, Sept. 25, 2019.
America. Global Warming, Giec's alarming report on the oceans, Sept. 25, 2019.
By RFI Published on 25-09-2019
The GIEC, the Intergovernmental Panel, issued an alarming report on Wednesday (25 September, 2019) on global warming, rising sea levels and melting ice.
MATHILDE BELLENGER / AFP
The GIEC, the Intergovernmental Panel on Climate Change, publishes its special report this Wednesday, September 25 on the consequences of global warming on the oceans and the cryosphere, that is to say the icy part of the planet . This report compiles updates of the latest scientific data.
The oceans and frozen areas, victims of global warming, are wasting fast, threatening large sections of humanity that must reduce its CO2 emissions as quickly as possible to limit the damage, warns this Wednesday an alarming report of the GIEC.
Changes already "irreversible"
Sea level rise of at least one meter by 2100, small islands threatened with submersion, glaciers that disappear ... Some of the devastating impacts of climate change are already "irreversible", notes the climate expert group UN after a five-day marathon meeting in Monaco.
Compared to previous reports, all estimates are worse. "If we see the figures concerning the rise in sea level, they are still higher than the last report of the GIEC on the 1.5 ° C released a few months ago," said Ludovic Frère-Escoffier, head of the program life Oceans at WWF France.
"If we are in a scenario at 2 ° C, there would be no more coral reef. These are not just beautiful areas to look at, it's a place that allows 500 million people to live there. It's a place where one in three species of the ocean will end up. There is an impact on the fauna and flora with a very strong depletion of the biodiversity of rivers, estuaries and coasts, where the species found in the ocean are reproduced and which allow 3 billion of people to feed on animal protein via fishing ", alarmed Ludovic Frère-Escoffier.
"Hundreds of billions of dollars"
Ocean levels have increased 2.5 times faster in the early 21st century than in the 20th century, and will continue to increase. "It's going to redefine the shorelines around the world, even where the population is concentrated," says Bruce Glavovic of Massey University in New Zealand.
On these shores, building up flood protection could reduce flood risk by 100 to 1,000 times, according to the report. Provided you invest "tens to hundreds of billions of dollars a year."
In total, according to the report, more than a billion people will live by the middle of the century in low-lying coastal areas particularly vulnerable to floods or other extreme weather events amplified by rising sea levels and climate change.
Even in a world at + 2 ° C, many megacities and small islands should be hit by 2050 at least once a year by an extreme event that only occurred every 100 years.
280 million climatic migrants by 2100
In the worst case scenario, 1 billion people would be affected by sea level rise by 2050 and there could be 280 million climatic migrants by 2100.
"Man by continuing to emit these emissions of greenhouse gases does not realize that the implications are very strong for a large part of the population"
Ludovic Frère-Escoffier, in charge of the ocean life program at WWF France explains the consequences of rising water levels on the population.
25/09/2019 - by Christine Siebert
"People who will be on a Pacific island for example in Polynesia on atolls will have to leave their land. Farmers who were in deltas or estuaries with the rise of the sea and the salinization of land will have to leave their land and change their farming practices, "explains Ludovic Frère-Escoffier, WWF Ocean Life Program Manager. France.
Ocean acidification
The oceans, which cover more than 70% of the earth's surface, have absorbed about a quarter of these emissions and 90% of the additional heat generated by man-made CO2.
The ocean plays a key role in stabilizing the climate, absorbing atmospheric heat and CO2. The cryosphere, the set of ice on Earth, is also a powerful sink for carbon and heat.
But this action of the oceans and the cryosphere has a price: the oceans acidify, lose their oxygen and see their level rise. These changes notably cause a decrease in the plankton, the main food of the fish, and thus a displacement of schools of fish.
Ice melts at different rates and with more or less serious consequences. For example, if permafrost, frozen earth, melts, it releases CO2 and methane, a very powerful greenhouse gas. Frozen parts of the globe that melt result in sea level rise.
Solutions already exist
Since 1993, the warming of the ocean has more than doubled. The first consequence is an increase in cyclones. In a scenario at + 1 ° C and a half by 2100, their frequency could be multiplied by 20, and by 50 in the case of an additional 3 or 4 ° C.
One of the objectives of the GIEC report is to provide elements with policies to be able to act. And it should also provide solutions. The first is known for a long time: drastically reduce greenhouse gas emissions, without waiting.
This report adopted by the 195 member states of the GIEC is the fourth scientific opus of the UN in one year to sound the alarm on the impacts of climate change and to point to ways to remedy or at least limit them.
F I N .
America. Global Warming, Giec's alarming report on the oceans, Sept. 25, 2019.
By RFI Published on 25-09-2019
The GIEC, the Intergovernmental Panel, issued an alarming report on Wednesday (25 September, 2019) on global warming, rising sea levels and melting ice.
MATHILDE BELLENGER / AFP
The GIEC, the Intergovernmental Panel on Climate Change, publishes its special report this Wednesday, September 25 on the consequences of global warming on the oceans and the cryosphere, that is to say the icy part of the planet . This report compiles updates of the latest scientific data.
The oceans and frozen areas, victims of global warming, are wasting fast, threatening large sections of humanity that must reduce its CO2 emissions as quickly as possible to limit the damage, warns this Wednesday an alarming report of the GIEC.
Changes already "irreversible"
Sea level rise of at least one meter by 2100, small islands threatened with submersion, glaciers that disappear ... Some of the devastating impacts of climate change are already "irreversible", notes the climate expert group UN after a five-day marathon meeting in Monaco.
Compared to previous reports, all estimates are worse. "If we see the figures concerning the rise in sea level, they are still higher than the last report of the GIEC on the 1.5 ° C released a few months ago," said Ludovic Frère-Escoffier, head of the program life Oceans at WWF France.
"If we are in a scenario at 2 ° C, there would be no more coral reef. These are not just beautiful areas to look at, it's a place that allows 500 million people to live there. It's a place where one in three species of the ocean will end up. There is an impact on the fauna and flora with a very strong depletion of the biodiversity of rivers, estuaries and coasts, where the species found in the ocean are reproduced and which allow 3 billion of people to feed on animal protein via fishing ", alarmed Ludovic Frère-Escoffier.
"Hundreds of billions of dollars"
Ocean levels have increased 2.5 times faster in the early 21st century than in the 20th century, and will continue to increase. "It's going to redefine the shorelines around the world, even where the population is concentrated," says Bruce Glavovic of Massey University in New Zealand.
On these shores, building up flood protection could reduce flood risk by 100 to 1,000 times, according to the report. Provided you invest "tens to hundreds of billions of dollars a year."
In total, according to the report, more than a billion people will live by the middle of the century in low-lying coastal areas particularly vulnerable to floods or other extreme weather events amplified by rising sea levels and climate change.
Even in a world at + 2 ° C, many megacities and small islands should be hit by 2050 at least once a year by an extreme event that only occurred every 100 years.
280 million climatic migrants by 2100
In the worst case scenario, 1 billion people would be affected by sea level rise by 2050 and there could be 280 million climatic migrants by 2100.
"Man by continuing to emit these emissions of greenhouse gases does not realize that the implications are very strong for a large part of the population"
Ludovic Frère-Escoffier, in charge of the ocean life program at WWF France explains the consequences of rising water levels on the population.
25/09/2019 - by Christine Siebert
"People who will be on a Pacific island for example in Polynesia on atolls will have to leave their land. Farmers who were in deltas or estuaries with the rise of the sea and the salinization of land will have to leave their land and change their farming practices, "explains Ludovic Frère-Escoffier, WWF Ocean Life Program Manager. France.
Ocean acidification
The oceans, which cover more than 70% of the earth's surface, have absorbed about a quarter of these emissions and 90% of the additional heat generated by man-made CO2.
The ocean plays a key role in stabilizing the climate, absorbing atmospheric heat and CO2. The cryosphere, the set of ice on Earth, is also a powerful sink for carbon and heat.
But this action of the oceans and the cryosphere has a price: the oceans acidify, lose their oxygen and see their level rise. These changes notably cause a decrease in the plankton, the main food of the fish, and thus a displacement of schools of fish.
Ice melts at different rates and with more or less serious consequences. For example, if permafrost, frozen earth, melts, it releases CO2 and methane, a very powerful greenhouse gas. Frozen parts of the globe that melt result in sea level rise.
Solutions already exist
Since 1993, the warming of the ocean has more than doubled. The first consequence is an increase in cyclones. In a scenario at + 1 ° C and a half by 2100, their frequency could be multiplied by 20, and by 50 in the case of an additional 3 or 4 ° C.
One of the objectives of the GIEC report is to provide elements with policies to be able to act. And it should also provide solutions. The first is known for a long time: drastically reduce greenhouse gas emissions, without waiting.
This report adopted by the 195 member states of the GIEC is the fourth scientific opus of the UN in one year to sound the alarm on the impacts of climate change and to point to ways to remedy or at least limit them.
F I N .
