A midge-based late-glacial temperature reconstruction from southwestern Nova Scotia

Whitney, Bronwen, Vincent, Jessie and Cwynar, Les (2005) A midge-based late-glacial temperature reconstruction from southwestern Nova Scotia. Canadian Journal of Earth Sciences, 42 (11). pp. 2051-2057. ISSN 0008-4077

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Abstract

We present a quantitative reconstruction of the thermal regime spanning the late-glacial period of Nova Scotia (14,700 to 11,600 BP) as inferred by analyzing fossil midges from a small lake (Lac à Magie) in southwestern Nova Scotia. The GS-1 event (equivalent to the Younger Dryas, dating from 12,700 to 11,600 BP in Maritime Canada) was marked by a 5°C decline in inferred mean July surface-water temperatures and a 15% drop in organic content. Previous pollen and plant macrofossil analyses of this site demonstrate a response of vegetation to GS-1 cooling. These data, coupled with a midge-inferred temperature reconstruction from a nearby site, suggest that late-glacial climate change was less pronounced in southern Nova Scotia than in other sites in Maritime Canada and adjacent eastern North America.

Item Type:	Article
Subjects:	F800 Physical and Terrestrial Geographical and Environmental Sciences
Department:	Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User:	Bronwen Whitney
Date Deposited:	09 Jun 2015 12:37
Last Modified:	12 Oct 2019 22:50
URI:	http://nrl.northumbria.ac.uk/id/eprint/22745

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