TY  - JOUR
A1  - Fritz, Michael
A1  - Herzschuh, Ulrike
A1  - Wetterich, Sebastian
A1  - Lantuit, Hugues
A1  - De Pascale, Gregory P.
A1  - Pollard, Wayne H.
A1  - Schirrmeister, Lutz
T1  - Late glacial and holocene sedimentation, vegetation, and climate history from easternmost Beringia (northern Yukon Territory, Canada)
JF  - Quaternary research : an interdisciplinary journal
N2  - Beringian climate and environmental history are poorly characterized at its easternmost edge. Lake sediments from the northern Yukon Territory have recorded sedimentation, vegetation, summer temperature and precipitation changes since similar to 16 cal ka BP. Herb-dominated tundra persisted until similar to 14.7 cal ka BP with mean July air temperatures <= 5 degrees C colder and annual precipitation 50 to 120 mm lower than today. Temperatures rapidly increased during the Bolling/Allerod interstadial towards modern conditions, favoring establishment of Betula-Salix shrub tundra. Pollen-inferred temperature reconstructions recorded a pronounced Younger Dryas stadial in east Beringia with a temperature drop of similar to 1.5 degrees C (similar to 2.5 to 3.0 degrees C below modern conditions) and low net precipitation (90 to 170 mm) but show little evidence of an early Holocene thermal maximum in the pollen record. Sustained low net precipitation and increased evaporation during early Holocene warming suggest a moisture-limited spread of vegetation and an obscured summer temperature maximum. Northern Yukon Holocene moisture availability increased in response to a retreating Laurentide Ice Sheet, postglacial sea level rise, and decreasing summer insolation that in turn led to establishment of Alnus-Berula shrub tundra from similar to 5 cal ka BP until present, and conversion of a continental climate into a coastal-maritime climate near the Beaufort Sea.
KW  - Trout Lake
KW  - Laurentide Ice Sheet
KW  - Younger Dryas
KW  - Holocene thermal maximum
KW  - Lake sediments
KW  - Pollen
KW  - Temperature reconstruction
KW  - Precipitation reconstruction
KW  - WAPLS
KW  - Modern analogue technique
Y1  - 2012
U6  - https://doi.org/10.1016/j.yqres.2012.07.007
SN  - 0033-5894
VL  - 78
IS  - 3
SP  - 549
EP  - 560
PB  - Elsevier
CY  - San Diego
ER  -