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

Bronwen Whitney; Jessie Vincent; Les Cwynar

doi:10.1139/e05-065

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

Bronwen Whitney, Jessie Vincent, Les Cwynar

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

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.

Original language	English
Pages (from-to)	2051-2057
Journal	Canadian Journal of Earth Sciences
Volume	42
Issue number	11
DOIs	https://doi.org/10.1139/e05-065
Publication status	Published - Nov 2005

Access to Document

10.1139/e05-065

Cite this

@article{61b9bb90a42442bd9d0c46d02c7f1caa,

title = "A midge-based late-glacial temperature reconstruction from southwestern Nova Scotia",

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 {\`a} 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.",

author = "Bronwen Whitney and Jessie Vincent and Les Cwynar",

year = "2005",

month = nov,

doi = "10.1139/e05-065",

language = "English",

volume = "42",

pages = "2051--2057",

journal = "Canadian Journal of Earth Sciences",

issn = "0008-4077",

publisher = "Canadian Science Publishing (Ottawa, Canada)",

number = "11",

}

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.

UR - https://www.scopus.com/pages/publications/33645639250

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 -

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this