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Sea level in the IPCC 6th assessment report (AR6)

Real Climate

My top 3 impressions up-front: The sea level projections for the year 2100 have been adjusted upwards again. The IPCC gives more consideration to the large long-term sea-level rise beyond the year 2100. And here is the key sea-level graphic from the Summary for Policy Makers: Source: IPCC AR6, Figure SPM.8.

Sea Level 363
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Saltwater Intrusion, a “Slow Poison” to East Coast Drinking Water

Circle of Blue

Summer tourism, sea level rise, and storm surges threaten East Coast wells. Storm surge overwash in Charlestown barrier-strip island due to nor’easter storm in March 2018. Hilton Head is fast becoming a prominent test case of rising sea levels and intense coastal storms heralded by climate change.

Sea Level 340
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The water south of Greenland has been cooling, so what causes that?

Real Climate

Sea surface temperature trend 1993 – 2018, from European Atlas of the Seas. 2018) Observed fingerprint of a weakening Atlantic Ocean overturning circulation, Nature 556: 191-196. 2022), Greenland ice sheet climate disequilibrium and committed sea-level rise, Nature Clim. 44: 1919-1927. Rahmstorf, S.,

Cooling 344
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From Research to Action: The Growing Impact of Attribution Science

Union of Concerned Scientists

By comparing these two data sets, scientists can determine the probability that human activities are responsible for observed changes in temperature, precipitation patterns, sea level rise, and other climate change indicators. A study of a 2018 South African drought found that climate change made it three times more likely.

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Phantastic Job!

Real Climate

There was a workshop in 2018 (that I attended) to discuss how one might go about doing something better – updating the data, improving quality control, and using models to better connect local or regional signals to the global means. and, like many of us, had found the then-current literature somewhat unsatisfactory. van der Meer, C.R.

Sea Level 354
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Deciphering the ‘SPM AR6 WG1’ code

Real Climate

The global mean sea level has increased by 20 cm from 1901 to 2018, and the rate of increase has accelerated and is now about 3.7 A thermal expansion explained 50% of sea level rise during 1971–2018, while ice loss from glaciers contributed 22%, ice sheets 20% and changes in land water storage 8%.

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What do U.S. states do at a COP, anyway?

Legal Planet

California Governor Jerry Brown in Bonn for the 2018 climate summit. They are often left to deal with climate effects on the ground, from wildfires to sea level rise to drought, and they can provide a political bulwark of sorts even as U.S. Photo credit Alexandra Gay, member of the UCLA Law delegation that year.