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Poster: Citizen Runner
Subject: RE: Greenland ice sheet melting faster than previously thought. PLEASE RECYCLE!
Body:


rose colored glasses? wrote:

We're looking at different timescales in the two images, and different indicators (SO4 instead of CO2 - I can't find CO2 data, would be pleased to look at it), but there's no evident sharp rise at 1950 (or in recent decades) to suggest significant changes.

The sulphate loading record from ice cores is used as a marker of volcanic events. The significance is that volcanic events are a natural driver to short term climate variation. Thus one would expect volcanic events to be correlated with variations in other climatic parameters in the indirect measurement (e.g. ice cores, tree rings, ...) records. Sulphate aerosols are a negative greenhouse driver.
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