Saturday, April 14, 2012


cc: "Wolf-Christian Dullo" <>
date: Mon Nov 1 09:57:16 2004
from: Phil Jones <>
subject: Re: Jacek
to: "Michael E. Mann" <>, Jacek Majorowicz <>

My name does appear to be down as convenor for CL20. I am not at the moment planning
to go. I suggest you contact the other two convenors Wolf-Christian Dullo and Jean Jouzel
as one of them may be going.
At 16:58 29/10/2004, Michael E. Mann wrote:

HI Jacek,
I'm not involved in the organization of the session next year. I don't think Phil Jones
is either, but I'm copying this message to Phil to check--there appears to be a mistake
in the program. You should check w/ the other conveners of the session,
At 12:45 PM 10/29/2004, Jacek Majorowicz wrote:

Dear Michael:
I have noticed that Jones et al (including you) are organizing a session on paleoclimate
in Viena next spring.
I wrote an email to all of you CConvenors asking if the paper on regional gst history
variations from well temp. inversion would fit in.
I have never seen any response. Has my email ever got through?
Best regards

----- Original Message -----
From: [2]Michael E. Mann
To: [3]Dr. Jacek Majorowicz
Sent: Monday, August 30, 2004 6:02 PM
Subject: Re: Jacek
Dear Jacek,
Thanks very much for sending this. I had a chance to read it over, and it is very
interesting--I like the fact that you've extended the estimates back over 1000
years, not just back 500 years (as in the papers by Huang and Pollack). This
provides a longer perspective on the recent GST warmth, and some some nice
independent confirmation of the basic conclusions from other (proxy and model)
evidence that late 20th century warmth is anomalous in at least a millennial context
(specifically, in the Arctic region in your analysis).
Incidentally, Phil Jones and I published a review paper in "Reviews of Geophysics"
earlier this year which provides a pretty up-to-date comparison of the various
proxy-based reconstructions and model simulations on this timeframe:
Jones, P.D., Mann, M.E., [4]Climate Over Past Millennia, Reviews of Geophysics, 42,
RG2002, doi: 10.1029/2003RG000143, 2004.
I would encourage you to send the paper you sent me to Phil Jones
( and Jonathan Overpeck ( They will lead
authors on the chapters dealing with these issues in the next IPCC report, and I
believe that the authors of the report would find your results very useful.
Best regards,
At 04:11 PM 8/30/2004, Dr. Jacek Majorowicz wrote:

Dear Michael:
Do you recall any 20th century N. America warming map which one could use to compare
with GST warming (based on well data)?
Also, 19-20th century would do.
I have a review paper into Reviews into Geophysics going.

I will appreciate any suggestions,

Attached are some n. wells interpretation.
I am attaching proofs so the corrections (like spelling of my name is wrong) are
Hope that this will be of interest. I did refer to your work questioning some of the
GST SAT tracking in the northern climates.
Dr. Jacek Majorowicz
Northern Geothermal
Email: [6]
Phone/Fax: (780)438-9385
Website: [7]

----- Original Message -----
From: [8]Michael E. Mann
To: [9]Dr. Jacek Majorowicz
Sent: Thursday, August 28, 2003 11:33 AM
Subject: Re: Jacek
Thanks for your message Jacek, and for the reprint. I'll look forward to
reading it as soon as I have the chance.
Re your comment, well I don't believe there is any reason for the fluxes to
balance out on decadal timescale or any other timescale, because this isn't
really a latent issue effect at all, its an issue of the incoming radiation
budget influence the air and ground. The ground doesn't "see" much of the
cold winter air cooling in the presence of snow cover because of insulation
and reflection of incoming radiation. So the ground never knows about the
negative atmospheric cooling that existed above the snow layer. This amounts
to a rectification of the seasonal temperature signal, and a loss of
information about the extent of winter cooling. Imagine a perfect insulator
between ground and air. It wouldn't matter to the ground if air temperatures
cooled 1 degree C or 10 degrees C, as long as the ground was insulated. So its
an issue of potential loss of information of cold-season temperature
Our model analysis bears that out, and I think that Tinjung Zhangs' work is
showing the same thing in Eurasian soil temperature measurements. Anyway, will
be interesting to continue to discuss.
Best regards,
At 11:21 AM 8/28/2003 -0600, you wrote:

Dear Dr. Mann:
attached is my paper on the polish history of gst vs. sat . these ones show
good agreement unlike in Canada.
Poland is also a country with variable snow cover like Canada. on the other
hand any major land clearing went through the area in the 15th-18th century so
that signal of step like temperature jump is not as significant in the
inversion process as in the Canadian situation where some of permanent land
change is only half a century old!
best regards
p.s. read with interest your grl paper. i am still not sure about the
influence of freezing -thawing process and latent heat effects. it is true
that ground stays at near 0 C when frozen despite much wilder surface
temperature changes; however in the anuual deacadal scale shouldnt it all be
reflected in the equality of fluxes. while heat is released when moist ground
freezes it is taken from the environment when it thaws in the spring. so, on
the annual/decadal scale wouldnt these two effects reflect some balance
allowing us good judgment on the long term increases or decreases of ground
temperature as seen by our well temperature inversion ?
p.s. my story on the north i have presented in nice is now in revision for
pure and applied geophysics. Lachenbruch's Alaska data inversion is quite
different from the canadian north . first one (as noticed by Lachenbruch in
his classic paper in science) shows quite late onset of surface warming(20th
century). it seems to be much earlier in the Canadian north (arctic islands
etc). variability of the warming onset time was also noticed in my 2002
October jgr red paper .
----- Original Message -----

From: [10]Michael E. Mann
To: [11]Dr. Jacek Majorowicz
Sent: Thursday, May 08, 2003 10:36 AM
Subject: Re: Jacek
Hi Jacek,
Thanks for your message--yes, I too was disappointed that the discussion
was not broader--I think that it was a bit of a setup by Hugo to debate
our latest work--perhaps that was useful, but it also didn't lead to a
very inclusive discussion, and that would have been more helpful from a
scientific point of view.
your new results sound very interesting indeed, and i look forward to
hearing more about them.
you can find a reprint of our JGR paper (and also a preprint of my GRL
paper w/ Gavin Schmidt modeling GST and SAT differences) here (as
downloadable pdf files):
comments would be welcome.
best regards,
At 09:11 AM 5/8/2003 -0600, Dr. Jacek Majorowicz wrote:

Dear Michel:
the discussion in nice France was really exciting. unfortunately my
paper on the northern arctic wells did not get any discussion at all and
I hope that it was just a result that it came last and people were
I have some funding to expend my work on influence of land change on
subsurface temperature in time and derived gsth into whole of Canada.
other examples include Cuba where depleting jungle for sugar cane
plantation had effect. some of gst warming derived from well
temperatures are some 4-5 deg. C!!.
I am just wondering if you have reprints or the latest .pdf of your
j.geoph. res. paper. ?
Jacek Majorowicz
105 Carlson Close
T6R 2J8
Professor Michael E. Mann
Department of Environmental Sciences, Clark Hall
University of Virginia
Charlottesville, VA 22903
e-mail: Phone: (434) 924-7770 FAX: (434) 982-2137

Professor Michael E. Mann
Department of Environmental Sciences, Clark Hall
University of Virginia
Charlottesville, VA 22903
e-mail: Phone: (434) 924-7770 FAX: (434) 982-2137
Professor Michael E. Mann
Department of Environmental Sciences, Clark Hall
University of Virginia
Charlottesville, VA 22903
e-mail: Phone: (434) 924-7770 FAX: (434) 982-2137

Professor Michael E. Mann
Department of Environmental Sciences, Clark Hall
University of Virginia
Charlottesville, VA 22903
e-mail: Phone: (434) 924-7770 FAX: (434) 982-2137

Prof. Phil Jones
Climatic Research Unit Telephone +44 (0) 1603 592090
School of Environmental Sciences Fax +44 (0) 1603 507784
University of East Anglia
Norwich Email

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