NDLI: Rapid 20th century environmental change on northeastern Baffin Island, Arctic Canada inferred from a multi-proxy lacustrine record

Content Provider	Springer Nature Link
Author	Thomas, Elizabeth K. Axford, Yarrow Briner, Jason P.
Copyright Year	2007
Abstract	The Arctic has a disproportionately large response to changes in radiative forcing of climate, and arctic lacustrine ecosystems respond sensitively to these changes. The goal of this research is to generate high-resolution climate records for the past two millennia using multiple proxies in order to place 20th and 21st century climate and environmental change into a long-term context. We use a $^{14}$C- and $^{210}$Pb-dated surface core from Lake CF8 on northeastern Baffin Island, Arctic Canada to generate a high-resolution multiproxy reconstruction of climate and environmental change. Throughout the late Holocene, primary productivity in Lake CF8 was low, but increased almost 20-fold in the past 200 years. Insect (Chironomidae) assemblages also show dramatic changes since 1950 AD, with cold stenothermous chironomid taxa disappearing from the record altogether. These changes in productivity and chironomid assemblages are unprecedented in the past 5,000 years. The dramatic ecological shifts that occurred at Lake CF8 have also been observed elsewhere in the Arctic, and will likely continue at ever-increasing rates as anthropogenic inputs of green house gases continue to cause climate warming and enhanced lacustrine primary production.
Starting Page	507
Ending Page	517
Page Count	11
File Format	PDF
ISSN	09212728
Journal	Journal of Paleolimnology
Volume Number	40
Issue Number	1
e-ISSN	15730417
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-12-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chironomids Climate change Late Holocene Anthropocene Arctic Lake sediments Paleolimnology Geology Freshwater & Marine Ecology Physical Geography Climate Change Sedimentology Paleontology
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Aquatic Science

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Original paper rapid 20th century environmental change on northeastern baffin island, arctic canada inferred from a multi-proxy.

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