Early Holocene Trace Metal Enrichment in Organic Lake Sediments, Baffin Island, Arctic Canada

1997 ◽  
Vol 29 (1) ◽  
pp. 24 ◽  
Author(s):  
Alexander P. Wolfe ◽  
Jocahim W. Hartling
Keyword(s):  
Trace Metal ◽  
Lake Sediments ◽  
Early Holocene ◽  
Baffin Island ◽  
Metal Enrichment ◽  
Arctic Canada

Wisconsinan and early Holocene glacial dynamics of Cumberland Peninsula, Baffin Island, Arctic Canada

2017 ◽  
Vol 168 ◽  
pp. 79-100 ◽  
Author(s):  
Annina Margreth ◽  
John C. Gosse ◽  
Arthur S. Dyke
Keyword(s):  
Early Holocene ◽  
Baffin Island ◽  
Arctic Canada ◽  
Glacial Dynamics

Wisconsinan refugia and the glacial history of eastern Baffin Island, Arctic Canada: Coupled evidence from cosmogenic isotopes and lake sediments

Geology ◽  
1998 ◽  
Vol 26 (9) ◽  
pp. 835 ◽  
Author(s):  
Eric J. Steig ◽  
Alexander P. Wolfe ◽  
Gifford H. Miller
Keyword(s):  
Lake Sediments ◽  
Baffin Island ◽  
Glacial History ◽  
Arctic Canada ◽  
Cosmogenic Isotopes ◽  
History Of

Paleoecological evidence for abrupt cold reversals during peak Holocene warmth on Baffin Island, Arctic Canada

2009 ◽  
Vol 71 (2) ◽  
pp. 142-149 ◽  
Author(s):  
Yarrow Axford ◽  
Jason P. Briner ◽  
Gifford H. Miller ◽  
Donna R. Francis
Keyword(s):  
Northern Hemisphere ◽  
Early Holocene ◽  
Positive Anomaly ◽  
Baffin Island ◽  
Arctic Canada ◽  
Cold Event ◽  
Temperature Changes ◽  
Climate Anomalies ◽  
Climate Shifts ◽  
Continuous Record

AbstractA continuous record of insect (Chironomidae) remains preserved in lake sediments is used to infer temperature changes at a small lake in Arctic Canada through the Holocene. Early Holocene summers at the study site were characterized by more thermophilous assemblages and warmer inferred temperatures than today, presumably in response to the positive anomaly in Northern Hemisphere summer insolation. Peak early Holocene warmth was interrupted by two cold reversals between 9.5 and 8 cal ka BP, during which multiple cold-stenothermous chironomid taxa appeared in the lake. The earlier reversal appears to correlate with widespread climate anomalies around 9.2 cal ka BP; the age of the younger reversal is equivocal but it may correlate with the 8.2 cal ka BP cold event documented elsewhere. Widespread, abrupt climate shifts in the early Holocene illustrate the susceptibility of the climate system to perturbations, even during periods of enhanced warmth in the Northern Hemisphere.

Patterns of postglacial vegetation establishment clarified by lacustrine sedaDNA from Baffin Island, Arctic Canada

2021 ◽  
Author(s):  
Sarah E. Crump ◽  
Matthew Power ◽  
Bianca Fréchette ◽  
Gregory de Wet ◽  
Martha K. Raynolds ◽  
...  
Keyword(s):  
Lake Sediment ◽  
Aquatic Plant ◽  
Early Holocene ◽  
Plant Colonization ◽  
Ecological Change ◽  
Baffin Island ◽  
Arctic Canada ◽  
Plant Migration ◽  
Plant Dna ◽  
Warming World

<p>The colonization of recently deglaciated landscapes by tundra vegetation during the early Holocene is an important case study for understanding possible rates and patterns of plant migration in a rapidly warming world. Fossil pollen in lake sediment has traditionally served as the primary tool for reconstructing paleovegetation and understanding postglacial biogeography. However, because pollen can be wind-transported long distances and, in some cases, reworked from older deposits on the landscape, pollen-based vegetation histories can sometimes obscure the true history of plant colonization. In contrast, lacustrine sedimentary ancient DNA (sedaDNA) is sourced locally and is less likely to be adequately preserved through reworking events, thus making it a more reliable proxy for determining the precise timing of plant colonization. Here, we present three sedaDNA records from Holocene lake sediment across southern Baffin Island, Arctic Canada, that clarify the timing of postglacial vegetation changes. In particular, DNA from the subarctic shrub <em>Betula</em> (dwarf birch) first appears thousands of years after deglaciation in all three lake catchments, suggesting delayed colonization despite its strong pollen signal in early postglacial sediments. While moderate levels of <em>Alnus</em> (alder) pollen characterize early to mid-Holocene lake sediments from the region, sedaDNA suggests that <em>Alnus</em> was likely not present in any of the three lake catchments during the Holocene. In addition, aquatic plant community changes indicated by sedaDNA faithfully reflect the timing of early Holocene warmth in the region, highlighting the potential utility of aquatic plant DNA as a qualitative temperature proxy. We suggest that ancient plant DNA in lake sediment provides key paleoecological information that is distinct from traditional proxy records, particularly during periods of relatively rapid ecological change like the early Holocene. </p>

Leaf wax δ2H and varve-thickness climate proxies from proglacial lake sediments, Baffin Island, Arctic Canada

2012 ◽  
Vol 48 (1) ◽  
pp. 193-207 ◽  
Author(s):  
Elizabeth K. Thomas ◽  
Sean McGrane ◽  
Jason P. Briner ◽  
Yongsong Huang
Keyword(s):  
Lake Sediments ◽  
Baffin Island ◽  
Arctic Canada ◽  
Varve Thickness ◽  
Leaf Wax ◽  
Proglacial Lake ◽  
Climate Proxies

Climate of the past millennium inferred from varved proglacial lake sediments on northeast Baffin Island, Arctic Canada

2008 ◽  
Vol 41 (1) ◽  
pp. 209-224 ◽  
Author(s):  
Elizabeth K. Thomas ◽  
Jason P. Briner
Keyword(s):  
Lake Sediments ◽  
Baffin Island ◽  
Arctic Canada ◽  
The Past ◽  
Proglacial Lake ◽  
Past Millennium

RECONSTRUCTING EARLY HOLOCENE DECADAL-RESOLUTION TEMPERATURE USING BRGDGTS FROM LAKE SEDIMENTS, WESTERN GREENLAND

2016 ◽  
Author(s):  
Kevin Q. Nguyen ◽  
◽  
Elizabeth K. Thomas ◽  
Isla S. Castañeda ◽  
Jason P. Briner ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Early Holocene

scholarly journals Supplementary material to "Episodic Neoglacial expansion and rapid 20th Century retreat of a small ice cap on Baffin Island, Arctic Canada and modeled temperature change"

2017 ◽  
Author(s):  
Simon L. Pendleton ◽  
Gifford H. Miller ◽  
Robert A. Anderson ◽  
Sarah E. Crump ◽  
Yafang Zhong ◽  
...  
Keyword(s):  
Temperature Change ◽  
20Th Century ◽  
Baffin Island ◽  
Arctic Canada ◽  
Ice Cap ◽  
Supplementary Material

scholarly journals The source of topography across the Cumberland Peninsula, Baffin Island, Arctic Canada: differential exhumation of a North Atlantic rift flank

2019 ◽  
Vol 176 (6) ◽  
pp. 1093-1106 ◽  
Author(s):  
Scott Jess ◽  
Randell Stephenson ◽  
Søren B. Nielsen ◽  
Roderick Brown
Keyword(s):  
North Atlantic ◽  
Baffin Island ◽  
Arctic Canada
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