The IPCC on a heterogeneous Medieval Warm Period

Jan Esper, David Frank

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

In their 2007 report, IPCC working group 1 refers to an increased heterogeneity of climate during medieval times about 1000 years ago. This conclusion would be of relevance, as it implies a contrast in the spatial signature and forcing of current warmth to that during the Medieval Warm Period. Our analysis of the data displayed in the IPCC report, however, shows no indication of an increased spread between long-term proxy records. We emphasize the relevance of sample replication issues, and argue that an estimation of long-term spatial homogeneity changes is premature based on the smattering of data currently available.

Original languageEnglish (US)
Pages (from-to)267-273
Number of pages7
JournalClimatic Change
Volume94
Issue number3-4
DOIs
StatePublished - Jun 2009
Externally publishedYes

ASJC Scopus subject areas

  • Global and Planetary Change
  • Atmospheric Science

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