TY - JOUR
T1 - A midge-based late-glacial temperature reconstruction from southwestern Nova Scotia
AU - Whitney, Bronwen
AU - Vincent, Jessie
AU - Cwynar, Les
PY - 2005/11
Y1 - 2005/11
N2 - 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.
AB - 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.
U2 - 10.1139/e05-065
DO - 10.1139/e05-065
M3 - Article
SN - 0008-4077
VL - 42
SP - 2051
EP - 2057
JO - Canadian Journal of Earth Sciences
JF - Canadian Journal of Earth Sciences
IS - 11
ER -