Climate Change News & Discussions

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caltrek
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Heat Waves Driven by Climate Change Have Cost Global Economy Trillions Since 1990s
October 28, 2022

Introduction:
(EurekAlert) Massive economic losses due to sweltering temperatures brought on by human-caused climate change are not just a problem for the distant future. A study in the journal Science Advances has found that more severe heat waves resulting from global warming have already cost the world economy trillions of dollars since the early 1990s — with the world’s poorest and lowest carbon-emitting nations suffering the most.

Dartmouth College researchers combined newly available, in-depth economic data for regions worldwide with the average temperature for the hottest five-day period — a commonly used measurement of heat intensity — for each region in each year. They found that from 1992-2013, heat waves statistically coincided with variations in economic growth and that an estimated $16 trillion was lost to the effects of high temperatures on human health, productivity and agricultural output.

The findings stress the immediate need for policies and technologies that protect people during the hottest days of the year, particularly in the world’s warmest, most economically vulnerable nations, the researchers report.

“Accelerating adaptation measures within the hottest period of each year would deliver economic benefits now,” said first author Christopher Callahan, a doctoral candidate in geography at Dartmouth. “The amount of money spent on adaptation measures should not be assessed just on the price tag of those measures, but relative to the cost of doing nothing. Our research identifies a substantial price tag to not doing anything.”

The study is the among the first to specifically examine how heat waves affect economic output, said senior author Justin Mankin, an assistant professor of geography at Dartmouth. “No one has shown an independent fingerprint for extreme heat and the intensity of that heat’s impact on economic growth. The true costs of climate change are far higher than we’ve calculated so far,” Mankin said.
Read more here: https://www.eurekalert.org/news-releases/968830
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Heat waves driven by climate change have cost global economy trillions since the 1990s
https://phys.org/news/2022-10-driven-cl ... lions.html
by Dartmouth College
Massive economic losses due to sweltering temperatures brought on by human-caused climate change are not just a problem for the distant future. A study in the journal Science Advances has found that more severe heat waves resulting from global warming have already cost the world economy trillions of dollars since the early 1990s—with the world's poorest and lowest carbon-emitting nations suffering the most.

Dartmouth College researchers combined newly available, in-depth economic data for regions worldwide with the average temperature for the hottest five-day period—a commonly used measurement of heat intensity—for each region in each year. They found that from 1992–2013, heat waves statistically coincided with variations in economic growth and that an estimated $16 trillion was lost to the effects of high temperatures on human health, productivity and agricultural output.

The findings stress the immediate need for policies and technologies that protect people during the hottest days of the year, particularly in the world's warmest, most economically vulnerable nations, the researchers report.

"Accelerating adaptation measures within the hottest period of each year would deliver economic benefits now," said first author Christopher Callahan, a doctoral candidate in geography at Dartmouth. "The amount of money spent on adaptation measures should not be assessed just on the price tag of those measures, but relative to the cost of doing nothing. Our research identifies a substantial price tag to not doing anything."
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Climate Change Could Trigger the Congo Peatlands to Release Billions of Tons of Carbon
November 2, 2022

Introduction:
(EurekAlert) Climate change could trigger the Congo peatlands to release billions of tonnes of carbon

• New research finds the peatlands are fragile and vulnerable to drought

• As the peatlands dry, the peat decomposes and releases carbon dioxide which accelerates global warming

• Study says this process has already happened once in the peatlands history - and could happen again

New research published in Nature today (Wed, Nov 2) reveals that the world’s largest tropical peatland turned from being a major store of carbon to a source of damaging carbon dioxide emissions as a result of climate change thousands of years ago.

Around the time that Stonehenge was built, 5,000 years ago, the climate of central Congo began to dry leading to the peatlands emitting carbon dioxide. The peatlands only stopped releasing carbon and reverted back to taking carbon out of the atmosphere when the climate got wetter again in the past 2,000 years, according to a major international study co-coordinated by the University of Leeds.
Read more here: https://www.eurekalert.org/news-releases/969535
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Climate change: Kilimanjaro's and Africa's last glaciers to go by 2050, says UN

2 days ago

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Glaciers across the globe - including the last ones in Africa - will be unavoidably lost by 2050 due to climate change, the UN says in a report.

Glaciers in a third of UN World Heritage sites will melt within three decades, a UNESCO report found.

Mount Kilimanjaro's last glaciers will vanish as will glaciers in the Alps and Yosemite National Park in the US.

They will melt regardless of the world's actions to combat climate change, the authors say.

The report, which makes projections based on satellite data, comes as world leaders prepare to meet in Egypt for next week's COP27 climate change conference.
https://www.bbc.co.uk/news/science-environment-63489041
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UN weather report: Climate woes bad and getting worse faster
Source: AP

By SETH BORENSTEIN

SHARM EL-SHEIKH, Egypt (AP) — Earth’s warming weather and rising seas are getting worse and doing so faster than before, the World Meteorological Organization warned Sunday in a somber note as world leaders started gathering for international climate negotiations.

“The latest State of the Global Climate report is a chronicle of climate chaos,” United Nations Secretary-General Antonio Guterres said. “We must answer the planet’s distress signal with action -- ambitious, credible climate action.”

In its annual state of the climate report, the United Nations’ weather agency said that sea level rise in the past decade was double what it was in the 1990s and since January 2020 has jumped at a higher rate than that. Since the decade began, seas are rising at 5 millimeters a year (.2 inches) compared to 2.1 millimeters (.08 inches) in the 1990s.

The last eight years have been the warmest on record, the WMO said in a report that didn’t break new ground but was a collection of recent weather trends, data and impacts in one central place.


Read more: https://apnews.com/article/science-unit ... osition_05
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"The number of delegates with links to fossil fuels at the UN climate summit has jumped 25% from the last meeting, analysis shared with the BBC shows."

https://www.bbc.co.uk/news/science-environment-63571610
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'Deeply Depressing' Study Shows Planet-Warming Emissions Continue to Rise
by Jake Johnson
November 11, 2022

Introduction:
(Common Dreams) Rapid and drastic cuts to global greenhouse gas emissions are necessary to curb warming and prevent the most dire climate scenarios from becoming reality.

But a new study released Friday by the Global Carbon Project finds "no sign of the decrease that is urgently needed" as emissions remain at record levels this year, with fossil fuel giants and governments plowing ahead with new extraction efforts that could push critical climate targets out of reach.

Scientists with the Global Carbon Project estimate that total CO2 emissions will reach 40.6 billion tonnes this year—driven by rising pollution from fossil fuels—and will likely continue to rise in 2023 without bold action from policymakers worldwide.

"If current emissions levels persist, there is now a 50% chance that global warming of 1.5°C will be exceeded in nine years," the researchers note. "Projected emissions from coal and oil are above their 2021 levels, with oil being the largest contributor to total emissions growth."

"The 2022 picture among major emitters is mixed: emissions are projected to fall in China (0.9%) and the E.U. (0.8%), and increase in the USA (1.5%) and India (6%), with a 1.7% rise in the rest of the world combined," the report finds.
Read more here: https://www.commondreams.org/news/2022 ... inue-rise
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