[Stoves] In praise of kerosene

Crispin Pemberton-Pigott crispinpigott at gmail.com
Wed May 15 07:29:52 CDT 2013


Dear Friends

 

There were a couple of inaccurate statements made in the past few days about
the recording (since the 1950's) of CO2, its level now and its level over
the period of time during which measurements have been made.

 

CO2 has been measured for 185 years first using a chemical process (some
10's of thousands of measurements made at many locations).  The precision
ranges from extremely good (better than 1 part in 1000) to 1 part in 30.

 

http://www.anenglishmanscastle.com/180_years_accurate_Co2_Chemical_Methods.p
df

 

This work has been ignored by the IPCC which for some reason claims the
level was constant and less than 300 ppm, ignoring actual measurements.

 

CO2 has been measured in Hawaii since the late 1950's using a different
method. After a while it was upgraded. It shows a clear annual variation
that coincides with northern hemisphere Spring and the melting of a huge
amount of continental and Arctic ice and snow creating fresh water which
absorbs a great deal of CO2 - about 1125 ppm, drawing down the concentration
by about 6 ppm until the re-freezing starts again.

 

The CO2 concentration in the atmosphere rises and falls when the climate
changes (see Figs 1 and 2 at the link immediately above)

 

Correction to the other post: The current CO2 concentration has not risen
above 400 ppm - a correction was issued by NOAA (you heard about the
correction in the media, right?)

 

http://wattsupwiththat.com/2013/05/13/premature-400-ppm-fail-a-bration/#more
-86162

 

http://www.latimes.com/news/science/sciencenow/la-sci-sn-carbon-dioxide-400-
20130513,0,7196126.story

 

>From the LA Times article:

"For the previous 800,000 years, CO2 levels never exceeded 300 ppm, and."

 

This comment is erroneous and is contradicted by multiple sources. As ice
cores show, the CO2 level lags temperature rises by about 800 years. As it
was significantly (about 2 Deg C) warmer during the Minoan Climate optimum
than it is now, it is highly likely that the CO2 level responded as normal
during those millennia which means it rose. As there exist thousands of CO2
measurements made during a period long enough to experience significant
climate cycles the idea that the temperature and the CO2 level were constant
cannot be supported. Temperature, most importantly ocean temperature, has a
significant though delayed effect on the CO2 concentration. How much has
been contributed by burning fossil fuels is not clear as studies (based on
isotopes) are not in agreement.

 

Ocean heat content, the main determinant of atmospheric temperatures, is a
relatively new field of study and has been brilliantly captured by Bob
Tisdale in his book on the subject. See
http://wattsupwiththat.com/2013/05/14/multidecadal-variations-and-sea-surfac
e-temperature-reconstructions/#more-86210 for his most recent study (aimed
at non-experts so it is quite appropriate).

 

Regards

Crispin

 

 

 

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