TY - JOUR
T1 - A pluvial episode identified in arid Australia during the Medieval Climatic Anomaly
AU - Cohen, T.J.
AU - Nanson, G.C.
AU - Jansen, J.D.
AU - Gliganic, L.A.
AU - May, J.-H.
AU - Larsen, J.R.
AU - Goodwin, I.D.
AU - Browning, S.
AU - Price, D.M.
PY - 2012
Y1 - 2012
N2 - Optically stimulated luminescence (OSL) ages from a relict shoreline on Lake Callabonna record a major pluvial episode in southern central Australia between 1050 ± 70 and 1100 ± 60 Common Era (CE), within the Medieval Climatic Anomaly (MCA). During this pluvial interval Lake Callabonna filled to 10–12 times the volume of the largest historical filling (1974) and reached maximum depths of 4–5 m, compared to the 0.5–1.0 m achieved today. Until now there has been no direct evidence for the MCA in the arid interior of Australia. A multi-proxy, analogue-based atmospheric circulation reconstruction indicates that the pluvial episode was associated with an anomalous meridional atmospheric circulation pattern over the Southern extratropics, with high sea-level pressure ridges in the central Indian Ocean and Tasman Sea, and a trough extending from the Southern Ocean into central Australia. A major decline in the mobility of the Australian aboriginal hunter-gatherer coincides with this MCA period, in southern central Australia.
AB - Optically stimulated luminescence (OSL) ages from a relict shoreline on Lake Callabonna record a major pluvial episode in southern central Australia between 1050 ± 70 and 1100 ± 60 Common Era (CE), within the Medieval Climatic Anomaly (MCA). During this pluvial interval Lake Callabonna filled to 10–12 times the volume of the largest historical filling (1974) and reached maximum depths of 4–5 m, compared to the 0.5–1.0 m achieved today. Until now there has been no direct evidence for the MCA in the arid interior of Australia. A multi-proxy, analogue-based atmospheric circulation reconstruction indicates that the pluvial episode was associated with an anomalous meridional atmospheric circulation pattern over the Southern extratropics, with high sea-level pressure ridges in the central Indian Ocean and Tasman Sea, and a trough extending from the Southern Ocean into central Australia. A major decline in the mobility of the Australian aboriginal hunter-gatherer coincides with this MCA period, in southern central Australia.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84868701111&partnerID=MN8TOARS
U2 - 10.1016/j.quascirev.2012.09.021
DO - 10.1016/j.quascirev.2012.09.021
M3 - Article
SN - 0277-3791
VL - 56
SP - 167
EP - 171
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
IS - 21
ER -