The Laurentide Ice Sheet sapped the strength of the North American monsoon during the last ice age, but the ice sheet’s grip on the monsoon weakened as it retreated northwards.
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Metcalfe, S.E. Icy grip on glacial monsoon. Nature Geosci 11, 802–803 (2018). https://doi.org/10.1038/s41561-018-0231-4
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DOI: https://doi.org/10.1038/s41561-018-0231-4
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