Climate Change | Sea Level Rise | Ocean Acidification

March 17, 2024

Ocean Sunset (by mpntag451 CC BY-NC-ND 3.0 License via DiviantArt)

Why Is the Sea So Hot? – the New Yorker

Excerpt:
A startling rise in sea-surface temperatures suggests that we may not understand how fast the climate is changing.

n early 2023, climate scientists—and anyone else paying attention to the data—started to notice something strange. At the beginning of March, sea-surface temperatures began to rise. By April, they’d set a new record: the average temperature at the surface of the world’s oceans, excluding those at the poles, was just a shade under seventy degrees. Typically, the highest sea-surface temperatures of the year are observed in March, toward the end of the Southern Hemisphere’s summer. Last year, temperatures remained abnormally high through the Southern Hemisphere’s autumn and beyond, breaking the monthly records for May, June, July, and other months. The North Atlantic was particularly bathtub-like; in the words of Copernicus, an arm of the European Union’s space service, temperatures in the basin were “off the charts.”

Since the start of 2024, sea-surface temperatures have continued to climb; in February, they set yet another record. In a warming world, ocean temperatures are expected to rise and keep on rising. But, for the last twelve months, the seas have been so feverish that scientists are starting to worry about not just the physical impacts of all that heat but the theoretical implications. Can the past year be explained by what’s already known about climate change, or are there forces at work that haven’t been accounted for? And, if it’s the latter, does this mean that projections of warming, already decidedly grim, are underestimating the dangers?

“We don’t really know what’s going on,” Gavin Schmidt, the director of nasa’s Goddard Institute for Space Studies, told me. “And we haven’t really known what’s going on since about March of last year.” He called the situation “disquieting…”

More on Climate Change | Sea Level Rise . . .

Aerial view of the Runit Dome (or Cactus Dome), Runit Island, Enewetak Atoll c. 1977-1980. The crater created by the Cactus shot of Operation Hardtack I was used as a burial pit to inter 84,000 cubic meters of radioactive soil scraped from the various contaminated Enewetak Atoll islands Courtesy of US Defense Special Weapons Agency, Public domain, via Wikimedia).

Decades after the US buried nuclear waste abroad, climate change could unearth it – Grist Magazine

A new report says melting ice sheets and rising seas could disturb waste from U.S. nuclear projects in Greenland and the Marshall Islands…The report summarizes disagreements between Marshall Islands officials and the U.S. Department of Energy regarding the risks posed by U.S. nuclear waste. The GAO recommends that the agency adopt a communications strategy for conveying information about the potential for pollution to the Marshallese people.

The easternmost Teklanika glacier has retreated approximately 450 yards (410 m) and downwasted (surface elevation decreased) approximately 300 feet (90 m) between 1959 and 2010. (Courtesy of National Park Service, 1919 photo by Stephen R. Capps, 2004 photo R.D. Karpilo).

Can the tourism industry survive the climate crisis? – the Guardian

From the Solomon Islands to Denali national park, how five communities reliant on tourism are coping as climate change upends their industry…One of the terrible ironies of the climate crisis is that some of the most beautiful – and popular – places in the world are also the most vulnerable. Which means as temperatures rise, extreme weather events increase, water sources dry up and natural habitats die, these places are facing another devastating loss: tourists…

Watercolor painting of the earth with hot gradient (by Martin Eklund, CC0, via Wikimedia Commons).

Earth on verge of five catastrophic climate tipping points, scientists warn – the Guardian

Humanity faces ‘devastating domino effects’ including mass displacement and financial ruin as planet warms…“Tipping points in the Earth system pose threats of a magnitude never faced by humanity,” said Tim Lenton, from the University of Exeter’s Global Systems Institute. “They can trigger devastating domino effects, including the loss of whole ecosystems and capacity to grow staple crops, with societal impacts including mass displacement, political instability and financial collapse…”

Beach near Freetown, Sierra Leone (by jbdodane CC BY-NC 2.0 DEED via Flickr).

A disappearing island: ‘The water is destroying us, one house at a time’ – NPR

With nearly a third of its population living in coastal areas, and its heavy reliance on subsistence agriculture and fishing, Sierra Leone has been identified as one of the world’s most vulnerable countries to the impacts of climate change, despite having contributed just a tiny fraction of global CO2 emissions. With a GDP per capita of barely $2,000, it is also one of the least prepared to deal with those impacts….

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