by Diamond et al. 2021, Apr 27, 2023 in NoTricksZone
During the last interglacial (LIG) 127 to 119k years ago, when CO2 levels were said to be only 275 ppm, Greenland’s Camp Century surface was ice free, vegetated. Today this same site is buried under a 1.4 kilometers-high ice sheet.
The Arctic was sea ice free during the LIG (Diamond et al., 2021).
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by D. Murtaugh, Apr 24, 2023 in Bloomberg
Provincial governments gave the green light to at least 20.5 gigawatts of new coal in the first quarter, topping the 18.5 gigawatts for all of 2021, Greenpeace said in a new research report. Approvals began to soar last year, to at least 90.7 gigawatts, after a series of economy-crippling power shortages, according to the study.
Greenpeace’s report is the latest in a series of research findings and industry comments highlighting Beijing’s plan to rely on its mainstay fuel as a backstop for reliable and affordable power amid rising global fuel prices and the development of intermittent renewable generation. The government is also leaning on miners to boost coal output to record levels to avoid a reliance on foreign supplies.
“The 2022 coal boom has clearly continued into this year,” said Xie Wenwen, Greenpeace East Asia climate and energy campaigner. Reasons given by governments in approval documents included ensuring safe energy supply, meeting heating demand and stimulating local economic development, Xie said.
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see also here : Coal in India
by WUWT, Apr 24, 2023
CORVALLIS, Ore. – During the last ice age, massive icebergs periodically broke off from an ice sheet covering a large swath of North America and discharged rapidly melting ice into the North Atlantic Ocean around Greenland, triggering abrupt climate change impacts across the globe.
These sudden episodes, called Heinrich Events, occurred between 16,000 and 60,000 years ago. They altered the circulation of the world’s oceans, spurring cooling in the North Atlantic and impacting monsoon rainfall around the world.
But little was known about the events’ effect on nearby Greenland, which is thought to be very sensitive to events in the North Atlantic. A new study from Oregon State University researchers, just published in the journal Nature, provides a definitive answer.
“It turns out, nothing happened in Greenland. The temperature just stayed the same,” said the study’s lead author, Kaden Martin, a fourth-year doctoral candidate in OSU’s College of Earth, Ocean, and Atmospheric Sciences. “They had front-row seats to this action but didn’t see the show.”
Instead, the researchers found that these Heinrich events caused rapid warming in Antarctica, at the other end of the globe.
The researchers anticipated Greenland, in close proximity to the ice sheet, would have experienced some kind of cooling. To find that these Heinrich Events had no discernible impact on temperatures in Greenland is surprising and could have repercussions for scientists’ understanding of past climate dynamics, said study co-author Christo Buizert, an assistant professor in the College of Earth, Ocean, and Atmospheric Sciences.
“If anything, our findings raise more questions than answers,” said Buizert, a climate change specialist who uses ice cores from Greenland and Antarctica to reconstruct and understand the Earth’s climate history. “This really changes how we look at these massive events in the North Atlantic. It’s puzzling that far-flung Antarctica responds more strongly than nearby Greenland.”
Scientists drill and preserve ice cores to study past climate history through analysis of the dust and tiny air bubbles that have been trapped in the ice over time. Ice cores from Greenland and Antarctica provide important records of Earth’s atmospheric changes over hundreds of thousands of years.
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