Universität zu Köln

Kostrova, Svetlana S., Meyer, Hanno ORCID: 0000-0003-4129-4706, Bailey, Hannah L., Ludikova, Anna V., Gromig, Raphael ORCID: 0000-0001-9217-4259, Kuhn, Gerhard ORCID: 0000-0001-6069-7485, Shibaev, Yuri A., Kozachek, Anna V., Ekaykin, Alexey A. and Chapligin, Bernhard (2019). Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes. Boreas, 48 (2). S. 361 - 377. HOBOKEN: WILEY. ISSN 1502-3885

Full text not available from this repository.

Abstract

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 (O-18(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 10.8cal. ka BP. The O-18(diatom) values range from +29.8 to +35.0 parts per thousand, and relatively higher O-18(diatom) values around +34.7 parts per thousand between c. 7.1 and 5.7cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in O-18(diatom) since c. 6.1cal. ka BP accelerates after c. 4cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8-0.2cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower O-18(diatom) values, whereas lower lake levels cause higher O-18(diatom) values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4-4.0cal. ka BP. Generally, overall high O-18(diatom) values around +33.5 parts per thousand characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga O-18(diatom) record is roughly in line with the 60 degrees N summer insolation, a linkage to broader-scale climate change is likely.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kostrova, Svetlana S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meyer, Hanno UNSPECIFIED orcid.org/0000-0003-4129-4706 UNSPECIFIED Bailey, Hannah L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ludikova, Anna V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gromig, Raphael UNSPECIFIED orcid.org/0000-0001-9217-4259 UNSPECIFIED Kuhn, Gerhard UNSPECIFIED orcid.org/0000-0001-6069-7485 UNSPECIFIED Shibaev, Yuri A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kozachek, Anna V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ekaykin, Alexey A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chapligin, Bernhard UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-152145
DOI:	10.1111/bor.12385
Journal or Publication Title:	Boreas
Volume:	48
Number:	2
Page Range:	S. 361 - 377
Date:	2019
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1502-3885
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute of Geology and Mineralog
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ATMOSPHERIC CIRCULATION; NETTILLING LAKE; CLIMATE CHANGES; WESTERN RUSSIA; KOLA-PENINSULA; BAFFIN-ISLAND; RECORD; SILICA; ICE; SEDIMENTS Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15214