Recent warming has occurred in near-surface firn in central Greenland, as shown by analysis of a 217 m temperature profile from the GISP2 site. However, this warming falls within the range of natural variability and provides no clear evidence of a greenhouse signal.
No takes yet. Share an insight, caveat, or question.
Alley et al. (1990) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: