Monday, April 9, 2012


cc: Nick McKay <>, Caspar Ammann <>, Bradley Ray <>, Keith Briffa <>, Miller Giff <>, Otto-Bleisner Bette <>, Overpeck Jonathan <>, Bo Vinther <>
date: Wed, 3 Jun 2009 18:23:38 -0600
from: David Schneider <>
subject: Re: spatial pattern
to: Darrell Kaufman <>

I don't think we should go there. Any PC analysis on proxy data will be picked apart by the
skeptics, even if it yields some useful insight, and I don't recall there being anything
too exciting in the pattern given the limited amount of data.

On Wed, Jun 3, 2009 at 5:42 PM, Darrell Kaufman <[1]> wrote:

Dave and Nick:
I've been thinking about the remaining holes in the manuscript. Spatial patterns are
important. At one point we explored the spatial pattern of the PC scores. I think it
would be good to bring this up in the SOM. I could make a dot map showing the site
locations and their correlations with PC1. The upshot would be that the proxy types are
not uniformly distributed, and there are too few records to discern any spatial patterns
from any geographical or proxy-type bias (e.g., high-elevation ice cores).

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