2022 updates to the temperature records
RealClimate
by Gavin
2w ago
Another January, another annual data point. As in years past, the annual rollout of the GISTEMP, NOAA, HadCRUT and Berkeley Earth analyses of the surface temperature record have brought forth many stories about the long term trends and specific events of 2022 – mostly focused on the impacts of the (ongoing) La Niña event and the litany of weather extremes (UK and elsewhere having record years, intense rainfall and flooding, Hurricane Ian, etc. etc.). But there are a few things that don’t get covered much in the mainstream stories, and so we can dig into them a bit here. What influence does EN ..read more
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Unforced variations: Jan 2023
RealClimate
by group
3w ago
Starting a little slowly this new year, but here is this month’s open thread. Look out for various updates of the annual 2022 numbers over the next week or so… The post Unforced variations: Jan 2023 first appeared on RealClimate ..read more
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The water south of Greenland has been cooling, so what causes that?
RealClimate
by Stefan
1M ago
Sea surface temperature trend 1993 – 2018, from European Atlas of the Seas Let’s compare two possibilities by a back-of-envelope calculation. (1) Is it due to a reduced heat transport of the Atlantic Meridional Overturning Circulation (AMOC)? (2) Or is it simply due to the influx of cold meltwater as the Greenland Ice Sheet is losing ice? The latter is often suggested. The meltwater also contributes indirectly to slowing the AMOC, but not because it is cold but because it is freshwater (not saline), which contributes to the first option (i.e. AMOC decline). AMOC heat transport For that we take ..read more
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Unforced variations: Dec 2022
RealClimate
by group
2M ago
This month’s open thread for climate discussions. Please be constructive and polite. The post Unforced variations: Dec 2022 first appeared on RealClimate ..read more
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Serious mistakes found in recent paper by Connolly et al.
RealClimate
by rasmus
2M ago
Guest post by Mark Richardson who is a Research Scientist in the Aerosol and Clouds Group at NASA’s Jet Propulsion Laboratory, California Institute of Technology. All opinions expressed are his own and do not in any way represent those of NASA, JPL or Caltech. Should scientists choose to believe provably false things? Even though that would mean more inclusive debates with a wider range of opinions, our recent paper Richardson & Benestad (2022) argues no: “instead of repeating errors, they should be acknowledged and corrected so that the debate can focus on areas of legitimate scientific ..read more
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Unforced variations: Nov 2022
RealClimate
by group
3M ago
This month’s open thread. Anyone read Greta Thunberg’s book? or have an opinion about soup? Be substantive, be polite, be talking about climate. The post Unforced variations: Nov 2022 first appeared on RealClimate ..read more
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The #ConcordOslo2022 workshop
RealClimate
by rasmus
3M ago
In recent years, the idea of climate change adaptation has received more and more attention and has become even more urgent with the unfolding of a number of extreme weather-related calamities. I wrote a piece on climate change adaptation last year here on RealClimate, and many of the issues that I pointed to then are still relevant.  The dire consequences of flooding, droughts and heatwaves that we have witnessed the last couple of years suggest that our society is not yet adapted even to the current climate. One interesting question is whether the climate science community is ready to ..read more
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Scafetta comes back for more
RealClimate
by Gavin
4M ago
A new paper from Scafetta and it’s almost as bad as the last one. Back in March, we outlined how a model-observations comparison paper in GRL by Nicola Scafetta (Scafetta, 2022a) got wrong basically everything that one could get wrong (the uncertainty in the observations, the internal variability in the models, the statistical basis for comparisons – the lot!). Now he’s back with a new paper in a different journal that could be seen as trying to patch the holes in the first one, but while he makes some progress, he now adds some new errors while attempting CPR on his original conclusions. Obs ..read more
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Unforced variations: Oct 2022
RealClimate
by group
4M ago
This month’s open thread on climate-related topics (sorry for the slight delay in setting it up). As usual, try to limit yourself to one comment a day, don’t be unnecessarily aggressive and try to be substantive. The post Unforced variations: Oct 2022 first appeared on RealClimate ..read more
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New misguided interpretations of the greenhouse effect from William Kininmonth
RealClimate
by rasmus
4M ago
I have a feeling that we are seeing the start of a new wave of climate change denial and misrepresentation of science. At the same time, CEOs of gas and oil companies express optimism for further exploitation of fossil energy in the wake of Russia’s invasion of Ukraine, at least here in Norway. Another clue is William Kininmonth’s ‘rethink’ on the greenhouse effect for The Global Warming Policy Foundation. He made some rather strange claims, such as that the Intergovernmental Panel on Climate  Change (IPCC) allegedly should have forgotten that the earth is a sphere because “most absorpti ..read more
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