Thursday, December 15, 2011


From: Jonathan Overpeck <>
To: Keith Briffa <>,
Subject: methods - section 6.2.2
Date: Wed, 12 Jan 2005 22:57:53 -0700
Cc: Eystein Jansen <>, joos <>, Valerie Masson-Delmotte <>

Hi all: Keith and Tim asked for specific requests in terms of what
you could do for section 6.2.2. I'm hoping Valerie and Fortunat have
already made enough progress that they can ask, but here's my take:

1. you have lots of methodology material in your, and this is
good. It would be good to refer to this from the earlier, more
general 6.2.2

2. the goal of 6.2.2 is to give the reader more confidence in paleo
and to get them to read on with confidence that what they read will
be of use

3. I suspect that the format V and F will be working around will be
one that can first highlight chronological issues (that we can date
some proxies very well, and that's what we focus on in this chapter
primarily). It would be good to have the usual comforting comments
about tree rings and other annual proxies.

4. The, it would be good to have the basics on how proxies reflect
climate, and how we know we understand the relationship. That it is
useful even if the proxy is responding to things other than climate.
Seasonality, etc. Include brief overview of calibration,
verification. you know the drill.

5. keep it short and not too detailed. Use lots of references -
including to the most recent stuff.

6. I'm sure we'll end up modifying/improving later after we figure
out what to do with the appendix

7. Need to work fast, very fast, but hopefully V and F have made real
progress already.

Thanks!! Peck
Jonathan T. Overpeck
Director, Institute for the Study of Planet Earth
Professor, Department of Geosciences
Professor, Department of Atmospheric Sciences

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