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October 27, 2021

U.N. Report Shows Greenhouse Gases Hit an All-time High. Are We Screwed?

Filed under: Fitness — Tags: , — admin @ 10:26 pm

According to a new report from the World Meteorological Organization (WMO), levels of greenhouse gases have never been higher. And despite a temporary reduction of emissions during the pandemic, greenhouse gases continue to increase. On the eve of a U.N. climate change conference in Scotland, the report has a clear message. What countries are doing right now to fight climate change isn’t going to be enough.

When 192 countries signed the Paris climate agreement in 2015, the goal was to keep mean global temperatures below 2˚C (3.6˚F) above pre-industrial levels. Ideally, they would limit any increase to 1.5˚C (2.7˚F). With the rising levels of carbon dioxide, methane, and nitrous oxide, those goals are in serious jeopardy.

The Paris climate agreement is already out of date

“At the current rate of increase in greenhouse gas concentrations, we will see a temperature increase by the end of this century far in excess of the Paris Agreement targets of 1.5 to 2 degrees Celsius above pre-industrial levels,” WMO Secretary-General Professor Petteri Taalas said in a press release. “We are way off track.”

Increasing temperatures mean more extreme weather. In the U.S., we’re seeing worse fire seasons, poor air quality and, most recently in California, a ‘bomb cyclone.’ Higher temperatures also contribute to ice melt, rising sea levels, and ocean acidification. It’s no wonder that an earlier U.N. climate report called this a ‘code red for humanity.’

For Taalas, the amount of carbon dioxide in the atmosphere was particularly troubling.

“This is more than just a chemical formula and figures on a graph. It has major negative repercussions for our daily lives and well-being, for the state of our planet and for the future of our children and grandchildren,” said Taalas.

The WMO report points to the Amazon as one example for the rise in greenhouse gases. In the past, the Amazon has been a carbon sink, absorbing CO2 and helping keep a global carbon balance. But due to decades of deforestation and changing climate, parts of the Amazon are now producing carbon and adding to the problem.

Taalas says many countries are setting carbon neutral targets. But, he hopes the climate change conference will yield bigger changes.

“We need to transform our commitment into action that will have an impact of the gases that drive climate change .We need to revisit our industrial, energy and transport systems and whole way of life. The needed changes are economically affordable and technically possible,” said Taalas. “There is no time to lose.”

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May 22, 2021

World’s Largest Iceberg Breaks Off Antarctica

Filed under: Fitness — Tags: , , , — admin @ 3:18 pm

A calving glacier can be a moment of great drama with cracks, booms, and gigantic waves as giant chunks of ice crash into the sea. But in the last few days, something much bigger went down in Antarctica, where a 105-mile-long iceberg broke off from the continent. A-76, as its known, is the largest iceberg in the world.


 

A-76 was discovered by the British Antarctic Survey (BAS) using Sentinel-1 satellites that operate in near-polar orbit. Among other research, the satellites monitor sea ice for the European Space Agency (ESA). Before setting off on its own, the iceberg was part of the Ronne Ice Shelf in Antarctica’s Weddell Sea.

At 1,668 square miles, A-76 is slightly smaller than the state of Delaware (1,982 square miles). In comparison, the ESA said it was slightly larger than the Spanish island of Majorca. The event was confirmed by the U.S. National Ice Center, a multi-agency organization that includes the U.S. Navy and U.S. Coast Guard, as well as the National Oceanic and Atmospheric Administration. A-76 gets its name from the Antarctic quadrant it comes from along with a sequential number. If the iceberg breaks up, its parts will each get sequential letters.

NASA scientists report that climate change is making a significant impact on Antarctica with the continent losing 145 gigatonnes of ice each year. To put gigatonnes in perspective, NASA says if you took one gigatonne of ice and put it in New York’s Central Park, it would be more than 1,100 feet tall.


While there are parts of Antarctica where warming waters are rapidly altering the glacial landscape, where A-76 came from isn’t one of them. According to BAS researchers, climate change has not significantly warmed the Weddell Sea and so the launch of a state-size iceberg is considered relatively normal here. “This calving is part of the natural cycle of the Ronne Ice Shelf,” says Dr. Alex Brisbourne, a glaciologist at BAS.

If A-76 remains in the cold waters of the Weddell Sea, it could be years before it melts. However, if it moves north to the South Atlantic, as expected, it won’t be the largest iceberg in the world for long.

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