Re: OT - Hansen acknowledges solar forcing

In <slrngof0h5.bnu.don@xxxxxxxxxxxxxx>, I, D.K. wrote edited for space:
In <u89co45fn36cacn5ooo727utsq2u7vc0cs@xxxxxxx>, Raveninghorde wrote:
On 1 Feb 2009 07:58:59 +0 UTC, don@xxxxxxxxxxxxxx (Don>>Klipstein) wrote:

In <aqh5o4td0trqnat33rb4eoi9vvuv54bp2d@xxxxxxx>, Raveninghorde wrote:
On Thu, 29 Jan 2009 09:34:40 -0800 (PST), bill.sloman@xxxxxxxx wrote:
<SNIP school debate activity to edit for space>
Has CO2 increased or is this just natural variation?

Summary:
http://www.biokurs.de/treibhaus/180CO2/bayreuth/bayreuth1e.htm
detail:
http://www.biomind.de/nogreenhouse/daten/EE%2018-2_Beck.pdf

The CO2 data that the AGW denialists and skeptics like, as in well above
300 ppmv before the 1950's, comes from air samples close to ground over
land. A lot of the time those run high in CO2, due to frequent times of
lack of sunlight (plants do less to no removal of CO2 emitted by animals,
bacteria, molds, fungi, yeasts, etc.) combined with lack of convection
(which usually runs lower when sunlight is absent).
Check out the story that CO2 measurements from the Wisconsin Tower
tells for a time of year when plants are active there, even as opposed to
Wisconsin in winter!

http://www.esrl.noaa.gov/gmd/ccgg/about/co2_measurements.html

How reliable are current measurements:

CO2 has been measured at Mauna Loa Observatory Hawaii since 1959.
Mauna Loa is the world's largest active volcano and emits CO2.

http://www.mlo.noaa.gov/programs/esrl/volcanicco2/volcanicco2.html

A volcanic component can be estimated by taking the difference in
concentration between periods when the plume is present and periods
immediately before and after that exhibit baseline conditions.

Right after the 1984 eruption, Mauna Loa emitted as much CO2 as an
American city of 40,000 people. By 2005, these emissions had fallen by
a factor of about 100.

Mauna Loa does not erupt much, and the people at the observatory do take
care to exclude eruptions. Notice the Mauna Loa observatory record to
have a few gaps. They have sufficient accuracy to discern seasonal
variations of a couple ppmv through most years since 1958 despite the
volcano.

http://www.esrl.noaa.gov/gmd/ccgg/about/co2_measurements.html
which links to
http://www.esrl.noaa.gov/gmd/ccgg/trends/

I doubt the measurements. The "globally distributed network of air
sampling sites" gives a corrected figure which agrees too closely with
the Mauna Loa data. Mauna Loa measurements should be higher than the
global average.

I look at the Mauna Loa and the global graphs on that page, and Mauna
Loa is indeed higher than global:

<SNIP saying again such details and links to edit for space>

The CO2 solubilty pump moves CO2 from higher latitudes to the tropics
where due to warming of the water outgassing occurs. Given Mauna
Loa's position in the tropics by the ocean the CO2 readings will be
significantly higher than the global average.

http://en.wikipedia.org/wiki/Solubility_pump

How much higher? Air moves around quite a bit.

I need to look at the seasonal variation in the measurements at Mauna
Loa. Given the small amount of land in the area the seasonal variation
should be small due to local cuases.

The seasonal variation in CO2 as measured at Mauna Loa is overwhelmingly
believed to be due to global causes since air moves around the world so
much.

I would now want to modify this by saying that the Mauna Loa CO2
concentration may easily have a hemisphere-specific seasonal variation due
to low rate of airflow across the intertropical convegence zone compared
to airflow crossing wide ranges of latitude on each side of the ITCZ.


The seasonal variation appears to me to have the downslope in the
middle of the year when vegetation in the Northern Hemisphere is receiving
more sunlight and upslope when the Northern Hemisphere has less sunlight.
Looks like land-based vegetation accounts for significant seasonal
variations in the amount of biomass in the world, and most of the world's
land is in the Northern Hemisphere.

<SNIP stuff said before with lack of relevance to global-vs-hemispheric
discernments of seasonal variations in atmospheric CO2 concentration>

- Don Klipstein (don@xxxxxxxxx)
.

Relevant Pages

  • Re: OT - Hansen acknowledges solar forcing
    ... Has CO2 increased or is this just natural variation? ... Check out the story that CO2 measurements from the Wisconsin Tower ... CO2 has been measured at Mauna Loa Observatory Hawaii since 1959. ... The "globally distributed network of air ...
    (sci.electronics.design)
  • Re: OT - Hansen acknowledges solar forcing
    ... Has CO2 increased or is this just natural variation? ... Check out the story that CO2 measurements from the Wisconsin Tower ... CO2 has been measured at Mauna Loa Observatory Hawaii since 1959. ... The "globally distributed network of air ...
    (sci.electronics.design)
  • Re: OT - Hansen acknowledges solar forcing
    ... Has CO2 increased or is this just natural variation? ... Check out the story that CO2 measurements from the Wisconsin Tower ... CO2 has been measured at Mauna Loa Observatory Hawaii since 1959. ... Mauna Loa is the world's largest active volcano and emits CO2. ...
    (sci.electronics.design)
  • Re: OT - Hansen acknowledges solar forcing
    ... lack of sunlight (plants do less to no removal of CO2 emitted by animals, ... Check out the story that CO2 measurements from the Wisconsin Tower ... Mauna Loa is the world's largest active volcano and emits CO2. ... significantly higher than the global average. ...
    (sci.electronics.design)
  • Re: CO2-Gehalt der =?Iso-8859-1?Q?Atmosph=C3=A4re?=
    ... So sonderlich viel CO2 kommt ja auch ... Mauna Loa und Kilauea sind vermutlich miteinander verbunden. ... 1983 war der letzte Ausbruch. ...
    (de.sci.chemie)