Late Glacial and Early Holocene Glacier Fluctuations in the Rwenzori Mountains, Uganda-Democratic Republic of Congo

Jackson, Margaret S.; Kelly, M. A.; Russell, James M.; Doughty, Alice M.; Howley, Jennifer A.; Baber, Margaret B.; Zimmerman, Susan H.

doi:10.1130/abs/2016ne-271830

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“…Finally, we point out that our new chronology brings events in Scotland and the circum‐North Atlantic closer in line with glacier records from the tropics (Bromley et al, ; Jackson et al, ; Jomelli et al, ; Rodbell & Seltzer, ; Stansell et al, ) and southern midlatitudes (Kaplan et al, , ; Menounos et al, ; Putnam et al, ; Strelin et al, ), raising the prospect of a widespread, rather than regional, signature of abrupt climate change during the last termination (e.g., Barker & Knorr, ; Figure ).…”

Section: Discussionsupporting

confidence: 77%

Interstadial Rise and Younger Dryas Demise of Scotland's Last Ice Fields

Bromley

Putnam

Borns

et al. 2018

Paleoceanog and Paleoclimatol

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Establishing the atmospheric expression of abrupt climate change during the last glacial termination is key to understanding driving mechanisms. In this paper, we present a new 14C chronology of glacier behavior during late‐glacial time from the Scottish Highlands, located close to the overturning region of the North Atlantic Ocean. Our results indicate that the last pulse of glaciation culminated between ~12.8 and ~12.6 ka, during the earliest part of the Younger Dryas stadial and as much as a millennium earlier than several recent estimates. Comparison of our results with existing minimum‐limiting 14C data also suggests that the subsequent deglaciation of Scotland was rapid and occurred during full stadial conditions in the North Atlantic. We attribute this pattern of ice recession to enhanced summertime melting, despite severely cool winters, and propose that relatively warm summers are a fundamental characteristic of North Atlantic stadials.

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