Universität zu Köln

Hammarlund, Dan ORCID: 0000-0001-7147-8173, Klimaschewski, Andrea, St Amour, Natalie A., Andren, Elinor, Self, Angela E., Solovieva, Nadia ORCID: 0000-0002-8978-9057, Andreev, Andrei A., Barnekow, Lena and Edwards, Thomas W. D. (2015). Late Holocene expansion of Siberian dwarf pine (Pinus pumila) in Kamchatka in response to increased snow cover as inferred from lacustrine oxygen-isotope records. Glob. Planet. Change, 134. S. 91 - 101. AMSTERDAM: ELSEVIER. ISSN 1872-6364

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Abstract

Holocene records of cellulose-inferred lake-water delta O-8 were produced from two lake-sediment sequences obtained in central and northern Kamchatka, Russian Far East. The sediment records share similar fluctuations in delta O-8 during the interval of ca. 5000-800 cal yr BP that correspond (inversely) with changes in K+ content of the GISP2 ice-core record from Greenland, a proxy for the relative strength of the Siberian High, suggesting control by climate-related variability in delta O-8 of regional precipitation. The dramatic expansion of Siberian dwarf pine (Pinus pumila) in northern and central Kamchatka between ca. 5000 and 4000 cal yr BP, as inferred from pollen records from the same and neighbouring sites, appears to have occurred at a time of progressively declining delta O-8 of precipitation. This development is interpreted as reflecting a regional cooling trend accompanied by increasing winter snowfall related to gradual intensification of the Siberian High from ca. 5000 to ca. 3000 cal yr BP. A thicker and more long-lasting snow cover can be assumed to have favoured P. pumila by providing a competitive advantage over other boreal and subalpine tree and shrub species in the region during the later part of the Holocene. These results, which are the first of their kind from Kamchatka, provide novel insight into the Holocene vegetational and climatic development in eastemmost Asia, as well as long-term atmospheric circulation dynamics in Beringia. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hammarlund, Dan UNSPECIFIED orcid.org/0000-0001-7147-8173 UNSPECIFIED Klimaschewski, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED St Amour, Natalie A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Andren, Elinor UNSPECIFIED UNSPECIFIED UNSPECIFIED Self, Angela E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Solovieva, Nadia UNSPECIFIED orcid.org/0000-0002-8978-9057 UNSPECIFIED Andreev, Andrei A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barnekow, Lena UNSPECIFIED UNSPECIFIED UNSPECIFIED Edwards, Thomas W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-388736
DOI:	10.1016/j.gloplacha.2015.04.004
Journal or Publication Title:	Glob. Planet. Change
Volume:	134
Page Range:	S. 91 - 101
Date:	2015
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1872-6364
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ATMOSPHERIC CIRCULATION DYNAMICS; MARKER TEPHRA LAYERS; PERMAFROST DISTRIBUTION; VEGETATION DYNAMICS; YUKON-TERRITORY; PAST CLIMATE; LAKE; PALEOHYDROLOGY; PENINSULA; INSIGHTS Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38873