Abrupt or gradual? Change point analysis of the late Pleistocene–Holocene climate record from Chew Bahir, southern Ethiopia

Martin Trauth, Verena Foerster, Annett Junginger, Asfawossen Asrat, Henry Lamb, Frank Schaebitz

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

23 Dyfyniadau(SciVal)
501 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

We used a change point analysis on a late Pleistocene–Holocene lake-sediment record from the Chew Bahir basin in the southern Ethiopian Rift to determine the amplitude and duration of past climate transitions. The most dramatic changes occurred over 240 yr (from ~15,700 to 15,460 yr) during the onset of the African Humid Period (AHP), and over 990 yr (from ~4875 to 3885 yr) during its protracted termination. The AHP was interrupted by a distinct dry period coinciding with the high-latitude Younger Dryas stadial, which had an abrupt onset (less than ~100 yr) at ~13,260 yr and lasted until ~11,730 yr. Wet-dry-wet transitions prior to the AHP may reflect the high-latitude Dansgaard-Oeschger cycles, as indicated by cross-correlation of the potassium record with the NorthGRIP ice core record between ~45–20 ka. These findings may contribute to the debates regarding the amplitude, and duration and mechanisms of past climate transitions, and their possible influence on the development of early modern human cultures.
Iaith wreiddiolSaesneg
Tudalennau (o-i)321-330
Nifer y tudalennau10
CyfnodolynQuaternary Research
Cyfrol90
Rhif cyhoeddi2
Dyddiad ar-lein cynnar11 Meh 2018
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Medi 2018

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Gweld gwybodaeth am bynciau ymchwil 'Abrupt or gradual? Change point analysis of the late Pleistocene–Holocene climate record from Chew Bahir, southern Ethiopia'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

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