[Coral-List] coral bleaching
Eugene Shinn
eugeneshinn at mail.usf.edu
Thu Apr 21 20:32:37 UTC 2022
Hi Austin, Thank you for being so polite. I examined the NOAA site
https://www.climate.gov/news-features/understanding-climate/climate-change-atmospheric-carbon-dioxide
<https://www.climate.gov/news-features/understanding-climate/climate-change-atmospheric-carbon-dioxide>
that you posted and found some problems. The figure showing 800,000
years of temperature data based on CO2 in bubbles in ice cores has been
around for a few years. What always catches my eye is the even spacing
of the temperature spikes beginning with the one that starts at 400,000
in the graph. The even spacing appears the same as the one still forming
today. If the first four are caused by wiggles in Earth’s orbit as
stated in the website then the present one was also caused by wiggles in
the orbit. That makes sense because it begins more than 10,000 years ago
long before there were automobiles, power plants etc etc. Also, its peak
is about the same as the preceding four peaks. The 412.5 ppm at end of
dashed red line is not from CO2 in bubbles but from the air above the
Hawaiian volcanic peak where measurements have been made since 1958. If
I did not know, I might wonder if there was a similar CO2 high above the
other four temperature peaks. (We have no way of knowing) I have long
wondered why no one has taken a short 1 or 2-ft long core from the
surface where the deep cores are taken to see if the CO2 in the bubbles
near the surface do in fact match the CO2 level in the air above the
snow/ice? It would be a good test to see if the data from bubbles in the
deep cores do actually reflect atmospheric CO2 levels. It would be a
simple thing to do. It would help determine if the data from the bubbles
are actually correct. I think the figure as it is would be very
misleading to the average non scientist person/tax payer. I might also
mention that most of the cores we have taken in the Florida Keys contain
a redish-brown soil stone/caliche layer capping each of the four peaks
in the ice core record. There is also an identical layer capping the
surface throughout the Florida Keys which demonstrates how the layers in
the subsurface were likely formed. Carbon 14 age dating has shown the
surface layer in the Keys is still forming. The redish/brown color is
caused by iron and clay minerals deposited from the atmosphere/African
dust.
The photos of two Pterapod aragonitic shells also caught my attention.
The one on the left does in fact show the effect of CO2 dissolution
which can happen when the shell sinks into deep cold water that contain
more CO2 than warm surface water. There have also been lab experiments
in which Pterapod shells were placed in water artificially acidified by
adding CO2. The one shown here was likely created that way. (Google:
Pteropod shell experiment). My suspicion is that this website was
prepared for members of congress and or the average citizen to show the
potential dangers of elevated CO2 levels that might occur in the future.
Thanks for bringing this to my attention. Gene
More information about the Coral-List
mailing list