Climate Change News & Discussions

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caltrek
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New Steel Production Produces Water as A By-Product Instead Of Carbon Dioxide
by Cr. Beccy Corkill
November 16, 2022

Introduction:
(IFL News) This November, many important decision-makers and climate activists descended on the Egyptian coastal city of Sharm El-Sheikh for the 27th Conference of the Parties of the United Nations Framework Convention on Climate Change (COP27).

During this event, vital climate decisions were discussed with the aim to try and tackle the increasingly critical climate emergency. This included ways to fight climate change and solutions to help reduce global greenhouse gas emissions.

Steel is essential in modern-day living. It is found in our houses, bridges, cars, medical equipment, and so much more. Unfortunately, the steel industry is one of the world’s largest contributors to global warming: in 2020, it contributed around 7 to 9 percent of global CO2 emissions.

Traditionally, steel is produced by the blast furnace, a process that is centuries old. In fact, the first ever blast furnace appeared in the 14th century and produced approximately 1 ton of steel a day. It was a process that used coal and coke and this, in turn, produced invaluable steel, but also a more harmful by-product – CO2.

SSAB is a Swedish steel company that has reinvented the steelmaking process and aims to offer fossil-free steel on an industrial scale as early as 2026.

Read more here: https://www.iflscience.com/new-steel-p ... ide-66229

The new technology is called HYBRIT and is also described here: https://www.ssab.com/en/fossil-free-st ... technology
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Dieback of the Amazon rainforest under climate change in the latest Earth system models
https://phys.org/news/2022-11-dieback-a ... atest.html
by University of Exeter
Dieback of the Amazon rainforest has long been touted as a possible climate tipping point, even though only a small minority of Earth System Models were projecting dieback.

A new study by researchers at the University of Exeter shows that this situation has now changed. Among the latest Earth System Models which simulate changes in forest carbon, most models now produce dieback events due to climate change in Amazonia.

Previous studies had suggested that once the tipping point is crossed in the Amazon, the whole region would experience severe dieback, but the new study—published in the journal Earth System Dynamics—finds that many of the latest models instead project localized dieback events.
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Study shows that strongest Arctic cyclone on record led to surprising loss of sea ice

by Hannah Hickey, University of Washington
https://phys.org/news/2022-11-strongest ... s-sea.html
A warming climate is causing a decline in sea ice in the Arctic Ocean, where loss of sea ice has important ecological, economic and climate impacts. On top of this long-term shift due to climate change are weather events that affect the sea ice from week to week.

The strongest Arctic cyclone ever observed poleward of 70 degrees north latitude struck in January 2022 northeast of Greenland. A new analysis led by the University of Washington shows that while weather forecasts accurately predicted the storm, ice models seriously underestimated its impact on the region's sea ice.

The study, published in October in the Journal of Geophysical Research: Atmospheres, suggests that existing models underestimate the impact of big waves on ice floes in the Arctic Ocean.

"The loss of sea ice in six days was the biggest change we could find in the historical observations since 1979, and the area of ice lost was 30% greater than the previous record," said lead author Ed Blanchard-Wrigglesworth, a research assistant professor of atmospheric sciences at the UW. "The ice models did predict some loss, but only about half of what we saw in the real world."
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Renewed Climate Disinformation Campaigns Threaten COP27 Progress
by Kristoffer Tigue & Bob Berwyn
November 22, 2022

Introduction:
(Undark) THE SLOW PACE of global climate talks were once again on display at COP27 last week and can be partially explained by a renewed blitz of climate disinformation, according to watchdog groups that analyze media ecosystems.

Last week, the Climate Action Against Disinformation coalition released a new analysis of efforts to undermine climate action and found that false and misleading claims made by right-wing media outlets about global warming and clean energy continue to affect public perception about the climate crisis. The fossil fuel industry, the authors said, is riding that wave of disinformation into the climate talks to promote false solutions.

“Misinformation has sowed uncertainty and impeded the recognition of risk…and the rise of climate misinformation is undermining climate action here at COP27,” Jacob Dubbins, a coauthor of the new report, said at a COP27 press conference.

The report said that Fox News remains a significant source of false and misleading information about the climate crisis, fueling unfounded public skepticism in a way that could even inspire violence against policymakers who advocate for strong climate action.

The report included a scientific survey on the media consumption habits of thousands of people in six different countries: Brazil, Australia, India, Germany, the United Kingdom, and the United States. It found that Americans, especially those who regularly watch Fox News, are the most likely among the study’s participants in all six countries to hold false beliefs about global warming.
Read more here: https://undark.org/2022/11/22/renewed- ... progress/
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The first complete picture of Arctic sea ice freeze-thaw cycle highlights sea ice response to climate change
https://phys.org/news/2022-12-picture-a ... -thaw.html
by European Geosciences Union
Years of research show that climate change signals are amplified in the Arctic, and that sea ice in this region is sensitive to increases in Arctic warming. Sea ice greatly modifies the exchanges of heat, momentum and mass between the atmosphere and the ocean. So, the timings of the sea ice melt and freeze onsets, as well as the length of the melt and freeze seasons, play a key role in the "heat budget" of the atmosphere-ice-ocean system.

Until now, most studies calculated the Arctic melt and freeze onsets using remote sensing observations from the surface, but rarely investigated the freeze-thaw process at ice bottom.

In a new study published today in the European Geosciences Union journal The Cryosphere, an international team of scientists synthesized multisource data from 2001 to 2018 to explore the spatiotemporal variations of both surface and basal melt/freeze onsets and uncover the mechanism behind them. These findings could improve our understanding of changes in the atmosphere–ice–ocean system and the mass balance of sea ice in a changing Arctic.
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Warming climate spurs harmful oxygen loss in lakes
https://phys.org/news/2022-12-climate-s ... lakes.html
by Blaine Friedlander, Cornell University

Rondaxe Lake in Herkimer County, New York, represents classic Adirondack Park waters. But over the last quarter-century, Rondaxe—like thousands of lakes in temperate zones around the world—has been losing a global-warming battle to maintain oxygen in its waters.

New research from Cornell University and Rensselaer Polytechnic Institute shows a continually warming world is leading to extended, late-summer weeks of water stratification, which prompts oxygen deprivation in the water—provoking conditions called hypoxia (low oxygen) and anoxia (no oxygen)—and negative consequences for fish and other species.

The work published Dec. 6 in the journal Global Change Biology.

"Lakes with dissolved oxygen losses strongly outnumber those with gains," said lead author Stephen Jane, a postdoctoral fellow at the Cornell Atkinson Center for Sustainability. "At large scales, aerobic organisms are losing available habitat as warming of lakes continues. This is particularly the case for organisms that rely on well-oxygenated cool waters deep in lakes to survive warm periods."
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It saddens me to see so many people on r/collapse fall for malthusian and ecofascist lies. Ecological overshoot is not a function of population but rather resource usage and beyond mere volume of resource consumption, how resources are extracted, produced and used. It's so simplistic and incredibly dangerous to reduce the ecological crises to a question of pure population.
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