GEOG 2110 Lecture Notes - Lecture 7: Laurentide Ice Sheet
9 Apr 2019
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1: the younger dryas was first recorded around 14,500 years ago in the grip data set, 13,640 in the florida straits and 13,700 in the vostok. The end date for all of them are around 12,550 years ago: yes, i believe it was globally synchronous, with a slight lag in occurrence. Florida seems to be the last one to react to the change. Grip could have a possible lag to due to it being closer to the deep water formation, and once it stopped, it experienced it faster than vostok. They all ended at around the same time, in terms of ending, then they are completely synchronous: when reviewing the northern hemisphere"s data (grip/fl), it suggests that wally. We can see the lag in florida"s response to the dryas, and that it begins in the northern atlantic (evident in the grip data). This suggests that the meltwater was exiting further north (mckenzie strait) and slowed the deep water formation.
