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Why Were 2023 and 2024 So Hot?

Union of Concerned Scientists

Scientists are sounding the alarm because this warming is shockingly bigbigger than what we would have expected given the long-term warming trend from fossil fuel-caused climate change. Albedo is the total reflection of incoming solar radiation by Earth. But why were 2023 and 2024 so warm? What is albedo?

2024 290
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CMIP6: Not-so-sudden stratospheric cooling

Real Climate

As predicted in 1967 by Manabe and Wetherald , the stratosphere has been cooling. The dominant factors are changes in CO2 (a cooling), ozone depletion (a cooling), warming from big volcanoes, and oscillations related to the solar cycle. So the net effect is less absorption and more emittence, and thus they give a cooling.

Cooling 294
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Clauser-ology: Cloudy with a chance of meatballs

Real Climate

In the last few months he has given two interviews in which he goes into to detail about what he describes as a ‘missing element’ in climate science and what he imagines the consequences are for climate change. The second was a podcast with the somewhat troubled Chris Smith , an Australian journalist. .

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AR6 of the best

Real Climate

Here are a few things that mark this report out from previous versions that relate to issues we’ve discussed here before: Extreme events are increasingly connected to climate (duh!) Extremes : Back in 2012, the literature assessed by AR5 connecting changes in extremes to climate change was scant.

Sea Level 362
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The Rise and Fall of the “Atlantic Multidecadal Oscillation”

Real Climate

Two decades ago, in an interview with science journalist Richard Kerr for the journal Science, I coined the term the “Atlantic Multidecadal Oscillation” (AMO) to describe an internal oscillation in the climate system resulting from interactions between North Atlantic ocean currents and wind patterns. Background.

Cooling 273
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A deep dive into the IPCC’s updated carbon budget numbers

Real Climate

estimate of no further CO 2 -induced warming or cooling once global CO 2 emissions reach and stay at next zero. ZEC therefore causes no changes between SR1.5 Rogelj et al, 2018; Huppmann et al, 2018), but with climate projections updated entirely with dedicated climate emulators that integrate the scientific information across chapter.

2018 359
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Shading the Great Barrier Reef from the sun might slow bleaching-induced coral decline

Frontiers

This knowledge can help with solar radiation management in marine ecosystems, including the Great Barrier Reef. As frequency and severity of mass bleaching events are expected to increase in the future, researchers are looking for ways to protect corals from excessive radiation and temperatures.

Cooling 141