On Sunday, July 28, 2013 1:32:54 AM UTC+1, Richard Dixon wrote:

How do you define an "anaologue" in your work? Similar years with similar indices or similar two-dimensional analogue structures?

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A bit of both.

For the former we are developing some good tools for combining and weighting indices. The problem is climatology, of course. Sometimes they can filter to only a few useful years, especially when you consider that stratospheric signals, for example, are not so discernible before the satellite age.

Stephen.