Monday, May 7, 2012


date: Thu, 04 Sep 2003 08:27:02 -0600
from: Caspar Ammann <>
subject: Re: AGU session submission
to: Tim Osborn <>

it seems to work now. Give it a shot.

Tim Osborn wrote:

> Dear Caspar,
> I have been trying for the past few hours to submit an abstract to the
> session that you're convening at the AGU Fall meeting. I've not
> managed to complete the process because their system is currently
> failing at the preview stage. It says to try again, which I will do,
> but because the official deadline is about to pass, I thought I'd
> email you my abstract just so that you know it is on the way (assuming
> the deadline is extended past when the system is fixed!).
> Best regards
> Tim
> ---------------------------------------------------
> Simulated and Observed Climate Signals in Borehole Temperature Profiles
> Tim Osborn
> Keith Briffa
> Climatic Research Unit, School of Environmental Sciences, University
> of East Anglia, Norwich NR4 7TJ, UK
> Simon Tett
> Hadley Centre - Reading, Meteorology Building, University of Reading,
> Reading, Berkshire RG6 6BB, UK
> Forward simulation of borehole temperature profiles are presented,
> using ground (soil) temperature variations simulated by the HadCM3
> climate model forced by natural and anthropogenic factors from AD 1500
> to 2000. Differences between soil temperature and air temperature
> variations are assessed, in terms of the driving influence of snow
> cover and vegetation cover changes, and in terms of their impact on
> the simulated borehole temperature profiles. The simulated profiles
> are then compared with observed temperature profile anomalies.
> The sensitivity of air temperature reconstructions to method of
> gridding the individual borehole records and to the profile sampling
> date will be demonstrated by analysis of the climate signal in the
> observed temperature profile data set. Comparison of the spatial
> signature of twentieth century borehole-derived trends with
> instrumental air temperature trends is used to assess confidence in
> the climate signal recoverable from the borehole data set.
> -----------------------------------------------
> Dr Timothy J Osborn
> Climatic Research Unit
> School of Environmental Sciences, University of East Anglia
> Norwich NR4 7TJ, UK
> e-mail:
> phone: +44 1603 592089
> fax: +44 1603 507784
> web:
> sunclock:

Caspar M. Ammann
National Center for Atmospheric Research
Climate and Global Dynamics Division - Paleoclimatology
Advanced Study Program
1850 Table Mesa Drive
Boulder, CO 80307-3000
email: tel: 303-497-1705 fax: 303-497-1348


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