TY - JOUR
T1 - Late glacial and Holocene environmental changes inferred from sediments in Lake Myklevatnet, Nordfjord, western Norway
AU - Nesje, Atle
AU - Bakke, Jostein
AU - Brooks, Stephen J.
AU - Kaufman, Darrell S.
AU - Kihlberg, Emma
AU - Trachsel, Mathias
AU - D'Andrea, William J.
AU - Matthews, John A.
N1 - Funding Information:
Åsmund Bakke, Herbjørn Heggen and Joachim Riis Simonsen participated in the lake coring and Bjørn Kvisvik and Jørund Strømsøe carried out some of the laboratory analyses. The radiocarbon dating was carried out at the Poznan Radiocarbon Laboratory under the leadership of Tomasz Goslar. Financial support was received from the Norwegian Research Council to the NORPAST-II, SEDITRANS and ARCTREC projects. Mathias Trachsel acknowledges financial support from the Swiss Science Foundation. Eva Bjørseth and Jane Ellingsen prepared some of the figures. To all these persons and institutions we offer our sincere thanks. We also thank two anonymous reviewers, whose comments and suggestions improved the paper. This is publication no. A437 from the Bjerknes Centre for Climate Research. The pioneering work of Hilary Birks and her collaborators at the Kråkenes site helped to shape the research presented in this paper.
PY - 2014/5
Y1 - 2014/5
N2 - Late Glacial and Holocene environmental changes were reconstructed using physical, chemical and biological proxies in Lake Myklevatnet, Allmenningen, (5°13′17″E, 61°55′13″N) located at the northern side of Nordfjorden at the coast of western Norway. Myklevatnet (123 m a.s.l.) lies above the Late Glacial marine limit and contains sediments back to approximately 14,300 years before a.d. 2000 (b2k). Because the lake is located ~48 km beyond the margin of the Younger Dryas (YD) fjord and valley glaciers further inland, and did not receive glacier meltwater from local glaciers during the YD, the lake record provides supplementary information to Lake Kråkenes that received glacial meltwater from a local YD glacier. Lake Myklevatnet has a small catchment and is sensitive to Late Glacial and Holocene climate and environmental changes in the coastal region of western Norway. The age-depth relationship was inferred from a radiocarbon- and tephra-based smoothing-spline model with correlated ages from oxygen isotope maxima and minima in the Late Glacial sequence of the NGRIP ice core (in years b2k) to refine the basal chronology in the Myklevatnet record. The results indicate a two-step YD warming, colder early YD temperatures than in the later part of the YD, and considerably more climate and environmental variability during the late Holocene in western Norway than recorded previously in the oxygen isotopes from Greenland ice cores. The Myklevatnet record is also compared with other Late Glacial and Holocene terrestrial and marine proxy reconstructions in the North Atlantic realm.
AB - Late Glacial and Holocene environmental changes were reconstructed using physical, chemical and biological proxies in Lake Myklevatnet, Allmenningen, (5°13′17″E, 61°55′13″N) located at the northern side of Nordfjorden at the coast of western Norway. Myklevatnet (123 m a.s.l.) lies above the Late Glacial marine limit and contains sediments back to approximately 14,300 years before a.d. 2000 (b2k). Because the lake is located ~48 km beyond the margin of the Younger Dryas (YD) fjord and valley glaciers further inland, and did not receive glacier meltwater from local glaciers during the YD, the lake record provides supplementary information to Lake Kråkenes that received glacial meltwater from a local YD glacier. Lake Myklevatnet has a small catchment and is sensitive to Late Glacial and Holocene climate and environmental changes in the coastal region of western Norway. The age-depth relationship was inferred from a radiocarbon- and tephra-based smoothing-spline model with correlated ages from oxygen isotope maxima and minima in the Late Glacial sequence of the NGRIP ice core (in years b2k) to refine the basal chronology in the Myklevatnet record. The results indicate a two-step YD warming, colder early YD temperatures than in the later part of the YD, and considerably more climate and environmental variability during the late Holocene in western Norway than recorded previously in the oxygen isotopes from Greenland ice cores. The Myklevatnet record is also compared with other Late Glacial and Holocene terrestrial and marine proxy reconstructions in the North Atlantic realm.
KW - Environmental change
KW - Holocene
KW - Lake sediments
KW - Late glacial
KW - Multi-proxy reconstruction
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U2 - 10.1007/s00334-013-0426-y
DO - 10.1007/s00334-013-0426-y
M3 - Article
AN - SCOPUS:84897727541
SN - 0939-6314
VL - 23
SP - 229
EP - 248
JO - Vegetation History and Archaeobotany
JF - Vegetation History and Archaeobotany
IS - 3
ER -