Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/30560
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Late glacial and Holocene climate variability, southernmost Patagonia
Author(s): McCulloch, Robert D
Blaikie, James
Jacob, Barbara
Mansilla, Claudia A
Morello, Flavia
De Pol-Holz, Ricardo
Román, Manuel San
Tisdall, Eileen
Torres, Jimena
Contact Email: e.w.tisdall@stir.ac.uk
Keywords: Palaeogeography
South America
Holocene
Rapid climate change
Southern westerly winds
Vegetation dynamics
Pollen analysis
Pollen preservation
Issue Date: 1-Feb-2020
Citation: McCulloch RD, Blaikie J, Jacob B, Mansilla CA, Morello F, De Pol-Holz R, Román MS, Tisdall E & Torres J (2020) Late glacial and Holocene climate variability, southernmost Patagonia. Quaternary Science Reviews, 229, Art. No.: 106131. https://doi.org/10.1016/j.quascirev.2019.106131
Abstract: A Late glacial – Holocene palaeoecological record, constrained by a robust chronology, from a peat bog near Punta Burslem (54°54′S, 67°57′W) on Isla Navarino, southernmost Patagonia documents the shifts in intensity and focus of the Southern Westerly Winds (SWWs) at these high latitudes. Such long-term records are required to reconstruct and better understand the likely regional impacts of a poleward shift and intensification of the SWWs predicted under global warming scenarios. Deglaciation at Punta Burslem occurs sometime before c. 17,000 cal a BP, and the post glacial landscape is dominated by cold tolerant pioneer species. Nothofagus woodland is established by c. 12,250 cal a BP, this moisture sensitive vegetation type retreats in the early to mid-Holocene from c. 9700 to 7050 cal a BP reflecting an intense and sustained drier phase associated with a prolonged poleward contraction of the SWWs. After c. 6000 cal a BP there is a regional trend to cooler and wetter climate. However, we identify at least five periods of rapid climate change (RCC) leading to drier conditions at this southern extreme of Patagonia: c. 5350-4750 cal a BP, c.4300-3300 cal a BP, c. 2600-1850 cal a BP, c. 1350-1100 cal a BP and c. 550-350 cal a BP. From a synthesis of our Isla Navarino records and a latitudinal spread (34°-64°S) of multiproxy records it is proposed that these periods of RCC and relatively drier conditions indicate latitudinal shifts in the location and intensity of the SWWs in response to climatic warming leading to reduced precipitation at the southern margins of Patagonia.
DOI Link: 10.1016/j.quascirev.2019.106131
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Accepted refereed manuscript of: McCulloch RD, Blaikie J, Jacob B, Mansilla CA, Morello F, De Pol-Holz R, Román MS, Tisdall E & Torres J (2019) Late glacial and Holocene climate variability, southernmost Patagonia. Quaternary Science Reviews, 229, Art. No.: 106131. DOI: https://doi.org/10.1016/j.quascirev.2019.106131 © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

Files in This Item:
File Description SizeFormat 
McCulloch et al Late glacial and Holocene climate variability AAM JQSR 2020 (002).pdfFulltext - Accepted Version1.2 MBAdobe PDFUnder Embargo until 2020-12-17    Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.



This item is protected by original copyright



A file in this item is licensed under a Creative Commons License Creative Commons

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.