Science Source
Extracting a Climate Signal from 169 Glacier Records
- 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
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