Dr. Stefan Rahmstorf, Potsdam University, explains his newly revised opinion of the high risk of AMOC shutdown, which would have dire consequences for the North Atlantic as well as potentially lowering temperatures drastically in northern Europe by tens of degrees Celsius. This video will be followed by commentary and Q&A with Cryosphere Pavilion scientists.
International Cryosphere Climate Initiative
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I would like to hear Dr Stefan Rahmstorf but why is the production so bad compare to all other presentations he has done. It is obvious that "Big Oil" doesn't want us to hear the real information about AMOC and climate change. Is it COP29 that is responsible for the production?????????
As always Dr Stefan Rahmsdorf's presentation was great (2:00-16.00 is the only part with rather good sound), but what is going on before and after the presentation is so poor in quality that you can't listen to it.
Norway has made lots of profit exporting fossil fuels. Perhaps this will be of interest to people living there.
The UK is about to get coooold
This is a scare story about things you cannot see.
To quote the Chief Scientist at the National Oceanography Centre, Professor Penny Holliday, "There hasn't been a slow down. There hasn't been a slowing of the AMOC."
Actual observations using the RAPID-MOCHA array from 2004 to 2023 show, that although there can be a great deal of variability of flow in the ocean from month to month or even day to day, there has been no decline in the Gulf Stream, with flow oscillating around 32Sv (32 million cubic metres per second) throughout the period of observation.
Continuous section measurements of the AMOC, available since 2004 at 26°N from the RAPID-MOCHA array, have shown that the AMOC strength decreased from 2004 to 2012, and thereafter, it has strengthened again. No relationship to CO2.
MOC spanning the North Atlantic at 27°N derived from RAPID/MOCHA/WBTS, satellite altimeter, and Argo floats for 1994 to 2020 shows no statistically significant decline (-0.06 Sv per decade). Furthermore blended meridional overturning basin-wide circulation (MOC) trend estimates (Sv) based on combinations of satellite altimetry and in situ hydrography data exist for the South Atlantic for 1994 onwards: at 34.5°S (often referred to as SAMBA) is +0.48Sv per decade. This is a significant positive trend, so no decline, no tipping point, no correlation to CO2. (GLOBAL OCEANS G. C. Johnson and R. Lumpkin, Eds., 2021)
The OSNAP MOC Timeseries of observations from Canada to Greenland and across to Scotland, although a shorter timescale (from 2014), show no decline in MOC with the flow fluctuating around 17Sv.
"Florida Current transport observations reveal four decades of steady state" Volkov et al, 2024 (published in Nature). This paper shows that a key component of AMOC, the Florida Current, has remained remarkably steady for over 40 years.
There is no climate crisis.
The North Atlantic current has doubled its velocity over the course of a quarter of century (Oziel et al, 2020). This is based on actual satellite observations.
The idea the AMOC is going to shut down is based on modelling. There is minimal real world evidence to support these outlandish claims. It relies upon climate models. You know, those Magical Truth Machines that keep making false predictions. It claims with 95% certainty that the AMOC with collapse by the end of the century. Come on! Really?
Sea surface temperatures (SST) were trending downwards 2000-2018 (HadSST 4), and from 1950-1980, and from 1880-1910. The oceans warmed at a faster rate 1910-1940 than 1980-2010. Remember CO2 has been accumulating in the atmosphere at an accelerating rate all the time, so there is little correlation between the two.
The North Atlantic ocean has cooled and warmed rapidly and repeatedly during the current interglacial with no correlation to CO2 e.g. 10,300-10,200 years before the present (y BP), 9,500y BP, 6,000-5,900y BP, 5,400-5,300y BP, 2,500-2,300y BP, 1,700-1,600y BP (Berner et al., 2008. See Figure 8 in the paper). There is a high frequency (18 events) of SST variability on the order of 1-3°C during a 10-50 year time resolution throughout the Holocene in the North Atlantic with no correlation to CO2. And Life just carried on.
In a word, no. This is just fear porn.
Does the AMOC oscillate between winter and summer? Is the weakening only observed in summer? Does strengthening to normal occur in the winter?