NOT TO KNOW MANY PEOPLE
January 16, 2021
By Paul Homewood
h / t MrGrimNasty
There was a nice discussion on Twitter about the latest GWPF bulletin inconveniently pointing out that there has been no global warming in the past 5 years:
No, in fact the world has warmed up in the last 5 years
The heat content of the ocean – a better indicator of the warming of the climate system as a whole (according to Levitus, Roger Pielke Snr and many others) – has shown a steadily increasing trend over decades and since 2016: //t.co/XSicWqn7WK pic.twitter .com / e.g. MS5WWCkI
– Richard Betts (@richardabetts) January 15, 2021
But why does Richard Betts show a graphic from 1958 that implies that ocean warming suddenly began to accelerate after 1990? While there is little reliable data on the ocean’s heat content prior to 1958, some would argue that the data prior to the ARGO buoys introduced in 2004 is also worthless.
Although the chart is labeled in zettajoules to make it look scary, the actual temperature changes are microscopic and not as accurately measurable in days leading up to ARGO.
For example, ARGO data shows an increase of about a hundredth of a degree since 2004.
https://climate4you.com/
However, we have much longer records of sea surface temperatures, for example the Hadley Centre’s HADSST3:
https://www.woodfortrees.org/plot/hadsst3gl
You will notice a couple of things.
First, global ocean temperatures actually dropped between 1940 and 1980. (This coincided with a slowdown in sea level rise). Betts, of course, wants you to believe that the rate of acceleration that has increased since then is due to AGW rather than a natural cyclical event.
Second, sea surface temperatures began to rise from 1900, long before CO2 emissions had the least impact on the world’s climate.
In fact, the rate of rise from 1910 to 1940 was the same as it has been since 1980. This also correlates with records of sea level rise around the world showing a similar pattern.
Simple physics tells us that the oceans determine the world’s climate and not the atmosphere. The heat capacity of the oceans is so much greater than air that the heat capacity of an atmospheric column of unit area cross-section extending from the sea surface to the outermost layers of the atmosphere is equivalent to the heat capacity of a seawater column 2.6 meters deep.
In other words, rising sea temperatures lead to an increase in atmospheric temperatures and not the other way around. We can easily see that there is an El Nino every time.
So the real question is why ocean temperatures have risen steadily since 1900. And if you think they are greenhouse gases, you need to explain how they caused the pre-1940 increase too.
4.6
10
be right
Item rating
Like this:
Loading…
Comments are closed.