Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes. / Kostrova, Svetlana S.; Meyer, Hanno; Bailey, Hannah L.; Ludikova, Anna V.; Gromig, Raphael; Kuhn, Gerhard; Shibaev, Yuri A.; Kozachek, Anna V.; Ekaykin, Alexey A.; Chapligin, Bernhard.
в: Boreas, Том 48, № 2, 04.2019, стр. 361-376.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes
AU - Kostrova, Svetlana S.
AU - Meyer, Hanno
AU - Bailey, Hannah L.
AU - Ludikova, Anna V.
AU - Gromig, Raphael
AU - Kuhn, Gerhard
AU - Shibaev, Yuri A.
AU - Kozachek, Anna V.
AU - Ekaykin, Alexey A.
AU - Chapligin, Bernhard
PY - 2019/4
Y1 - 2019/4
N2 - This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (δ 18 O diatom ) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The δ 18 O diatom values range from +29.8 to +35.0‰, and relatively higher δ 18 O diatom values around +34.7‰ between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in δ 18 O diatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8–0.2 cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower δ 18 O diatom values, whereas lower lake levels cause higher δ 18 O diatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4–4.0 cal. ka BP. Generally, overall high δ 18 O diatom values around +33.5‰ characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga δ 18 O diatom record is roughly in line with the 60°N summer insolation, a linkage to broader-scale climate change is likely.
AB - This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (δ 18 O diatom ) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The δ 18 O diatom values range from +29.8 to +35.0‰, and relatively higher δ 18 O diatom values around +34.7‰ between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in δ 18 O diatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8–0.2 cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower δ 18 O diatom values, whereas lower lake levels cause higher δ 18 O diatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4–4.0 cal. ka BP. Generally, overall high δ 18 O diatom values around +33.5‰ characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga δ 18 O diatom record is roughly in line with the 60°N summer insolation, a linkage to broader-scale climate change is likely.
KW - ATMOSPHERIC CIRCULATION
KW - NETTILLING LAKE
KW - WESTERN RUSSIA
KW - KOLA-PENINSULA
KW - BAFFIN-ISLAND
KW - RECORD
KW - CLIMATE
KW - SILICA
KW - ICE
KW - SEDIMENTS
UR - http://www.scopus.com/inward/record.url?scp=85062362799&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/holocene-hydrological-variability-lake-ladoga-northwest-russia-inferred-diatom-oxygen-isotopes
U2 - 10.1111/bor.12385
DO - 10.1111/bor.12385
M3 - Article
AN - SCOPUS:85062362799
VL - 48
SP - 361
EP - 376
JO - Boreas
JF - Boreas
SN - 0300-9483
IS - 2
ER -
ID: 39352050