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A pluvial episode identified in arid Australia during the Medieval Climatic Anomaly
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi och kvartärgeologi (INK).
Vise andre og tillknytning
2012 (engelsk)Inngår i: Quaternary Science Reviews, ISSN 0277-3791, E-ISSN 1873-457X, Vol. 56, s. 167-171Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 10e12 times the volume of the largest historical filling (1974) and reached maximum depths of 4e5 m, compared to the 0.5e1.0 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.

sted, utgiver, år, opplag, sider
2012. Vol. 56, s. 167-171
Emneord [en]
mega-lake, Lake Callabonna, Medieval Climatic Anomaly, OSL, Palaeoshoreline
HSV kategori
Forskningsprogram
geografi med naturgeografisk inriktning
Identifikatorer
URN: urn:nbn:se:su:diva-82623DOI: 10.1016/j.quascirev.2012.09.021ISI: 000311665000012OAI: oai:DiVA.org:su-82623DiVA, id: diva2:570714
Tilgjengelig fra: 2012-11-20 Laget: 2012-11-20 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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