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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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Why is future sea level rise still so uncertain?

Real Climate

Three new papers in the last couple of weeks have each made separate claims about whether sea level rise from the loss of ice in West Antarctica is more or less than you might have thought last month and with more or less certainty. The last major revision (BedMap2) was in 2013 ( Fretwell et al., But there is more.

Sea Level 254
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AR6 of the best

Real Climate

Sea level rise is a big deal Use, abuse and misuse of the CMIP6 ensemble The radiative forcing bar chart has gone full circle Droughts and floods are complicated Don’t mention the hiatus. Sea Level Rise: The previous IPCC reports, notably AR4 and AR5 (to a lesser extent) , have had a hard time dealing with SLR.

Sea Level 361
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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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Deciphering the ‘SPM AR6 WG1’ code

Real Climate

The problems with the SPM are similar those from the previous fifth assessment report which prompted me to write a post in 2013. I think in hindsight that my concerns from 2013 to some extent were supported by the fact that the IPCC organised an Expert Meeting on Communication, Oslo, Norway, 9–10 February 2016. mm increase every year.

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A distraction due to errors, misunderstanding and misguided Norwegian statistics

Real Climate

While temperatures provide a measure of the Earth’s climate, it is even better to use the global sea level , which provides a far more reliable measure. The global sea level acts like the mercury in a thermometer because warmer water expands.

Sea Level 352
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ExxonMobil Accurately Projected Rising Temperatures While Publicly Disparaging Climate Science

Union of Concerned Scientists

The new paper in Science summarizes key statements by ExxonMobil executives between 2000 and 2013 that cast doubt on the science. Research produced by the Union of Concerned Scientists (UCS) has shown that rising temperatures, sea level rise , and ocean acidification have all been made worse by fossil fuel companies’ activities and products.