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Related Experiment Videos

Climate change. Climate in Medieval time.

Raymond S Bradley1, Malcolm K Hughes, Henry F Diaz

  • 1Climate System Research Center, Department of Geosciences, University of Massachusetts, Amherst, MA 01003, USA. rbradley@geo.umass.edu

Science (New York, N.Y.)
|October 18, 2003
PubMed
Summary
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The Medieval Warm Period was not globally warmer than today. While the High Medieval era saw regional warming, temperature increases were not synchronous worldwide, highlighting significant climate variability.

Area of Science:

  • Paleoclimatology
  • Climate Science
  • Earth System Science

Background:

  • The
  • Medieval Warm Period
  • is frequently cited in discussions of natural climate variability.
  • However, its precise definition and global temperature comparisons remain debated.

Purpose of the Study:

  • To critically evaluate the evidence for the Medieval Warm Period.
  • To determine if medieval climate was as warm as or warmer than present-day climate.
  • To assess the spatial synchronicity of medieval warming events.

Main Methods:

  • Review of existing paleoclimatic proxy data and scientific literature.
  • Analysis of temperature reconstructions from various global regions.

Related Experiment Videos

  • Examination of precipitation pattern data from the High Medieval period.

    • Main Results:

    • The High Medieval period (1100–1200 A.D.) was warmer than subsequent centuries.
    • Global temperatures during the Medieval Warm Period were not warmer than the late 20th century.
    • Peak medieval warmth was not synchronous across different geographical regions.
    • Significant shifts in precipitation patterns characterized the High Medieval era.

    Conclusions:

    • The term
    • Medieval Warm Period
    • requires careful definition and regional consideration.
    • Medieval climate variability, including temperature and precipitation, was substantial.
    • Further research into the mechanisms driving these past climate changes is crucial for understanding current climate dynamics and anthropogenic impacts.