Apr 29, 2005

Extracting a Climate Signal from 169 Glacier Records

by
J. Oerlemans
,
Science
  • Constructs a temperature history for different parts of the world from 169 glacier length records
  • Relates changes in glacier length to changes in temperature using a first-order theory of glacier dynamics
  • Finds that the derived temperature histories are fully independent of proxy and instrumental data used in earlier reconstructions
  • States that moderate global warming started in the middle of the 19th century, and the reconstructed warming in the first half of the 20th century is 0.5 kelvin
  • States that this warming was notably coherent over the globe, and the warming signals from glaciers at low and high elevations appear to be very similar