From former cirque glaciers in W Norway, it is calculated that the summer temperature dropped 5-6 degrees C during less than two centuries, probably within decades, at the Allerod/Younger Dryas transition, some 11 000 years ago. From the same data the Younger Dryas summer temperature is estimated to have been 8-10 degrees C lower than at present, and from fossil ice wedges the mean annual temperatures 13 degrees C lower than at present in the same area. -from Author
CITATION STYLE
Mangerud, J. (1987). The Allerod/ Younger Dryas boundary. Abrupt Climatic Change. Proc. 1985, 163–171. https://doi.org/10.1007/978-94-009-3993-6_16
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