from: Jorge S�nchez Sesma <jsanchezatXYZxyzloc.imta.mx>
subject: Cooperation in climate reconstruction using proxy records.
to: tswetnamatXYZxyzr.arizona.edu, email@example.com, dstahleatXYZxyzp.uark.edu, k.briffaatXYZxyz.ac.uk
Dear Drs. Swetnam, Hirschboeck, Stahle and Briffa:
Enclosed please find the manuscript "Carbon dioxide (CO2) reconstructed
records over the past 10,000 years (10Ky)" by A. A. Aldama, F. J.
S�nchez-Sesma and myself. It has been submitted to be considered for
publication in the section Letters to Nature.
I am sending this work to your kind attention, because it takes into
account data obtained in your labs or published results of previous studies
about climate reconstruction based on tree-rings.
The manuscript presents analysis and synthesis of the most important
information regarding carbon dioxide for the last 10 thousand years, using
calibrated proxy records to reconstruct the CO2 record and its range of
variation as well. The results obtained therein strongly suggest:
a) A significant reduction, around 25%, of the previous estimate for the
anthropogenic contribution of CO2 during the last centuries,
b) Larger variations of CO2 during the last thousand years than previous
c) Significant lags between sea level variation and CO2.
I would like to know your opinion, coments and suggestions in the final
version and also to stablish a formal cooperation in this amazing subject.
For your information I am writing a paper about Global Temperature based on
proxy records with very interesting results. When it will be finished I
will send you a copy.
(PD. please send me a confirmation message.)
INSTITUTO MEXICANO DE TECNOLOGIA DEL AGUA
COORDINACI�N DE HIDROLOG�A
PASEO CUAUHNAHUAC 8532
PROGRESO, JIUTEPEC, MORELOS
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