Peat multi-proxy data from Männikjärve bog as indicators of late Holocene climate changes in Estonia |
| |
| Authors: | UULLE SILLASOO DMITRI MAUQUOY ANTONY BLUNDELL DAN CHARMAN MAARTEN BLAAUW JOHN R G DANIELL PHILLIP TOMS JULIA NEWBERRY FRANK M CHAMBERS EDGAR KAROFELD |
| |
| Institution: | UUlle Sillasoo (e-mail: ), Department of Landscape Ecology, Institute of Ecology at Tallinn University, 5 Uus-Sadama St, 10120 Tallinn, Estonia;Edgar Karofeld (e-mail: ), Institute of Botany and Ecology, University of Tartu, 40 Lai St., 51005 Tartu, Estonia;Dmitri Mauquoy (e-mail: ), Department of Geography and Environment, University of Aberdeen, Elphinstone Road, Aberdeen AB24 3UF, UK;Antony Blundell (e-mail: ), Department of Geography, Roxby Building, University of Liverpool, Liverpool, L69 7ZT, UK;Dan Charman (e-mail: ), School of Geography, University of Plymouth, Plymouth, Devon PL4 8AA, UK;Maarten Blaauw (e-mail: ), Centro de Investigacion en Matemáticas, A. P. 402, Guanajuato, Gto., C.P 36000, Mexico;John G R. Daniell (e-mail: ), Phillip Toms (e-mail: ), Julia Newberry () and Frank M. Chambers (e-mail: ), Centre for Environmental Change and Quaternary Research, University of Gloucestershire, Francis Close Hall, Swindon Road, Cheltenham GL50 4AZ, UK |
| |
| Abstract: | Sillasoo, Ü., Mauquoy, D., Blundell, A., Charman, D., Blaauw, M., Daniell, J. R. G., Toms, P., Newberry, J., Chambers, F M. & Karofeld, E. 2007 (January): Peat multi‐proxy data from Männikjärve bog as indicators of late Holocene climate changes in Estonia. Boreas, Vol. 36, pp. 20–37. Oslo. ISSN 0300–9483. As part of a wider project on European climate change over the past 4500 years, a 4.5‐m peat core was taken from a lawn microform on Männikjärve bog, Estonia. Several methods were used to yield proxy‐climate data: (i) a quadrat and leaf‐count method for plant macrofossil data, (ii) testate amoebae analysis, and (iii) colorimetric determination of peat humification. These data are provided with an exceptionally high resolution and precise chronology. Changes in bog surface wetness were inferred using Detrended Correspondence Analysis (DCA) and zonation of macrofossil data, particularly concerning the occurrence of Sphagnum balticum, and a transfer function for water‐table depth for testate amoebae data. Based on the results, periods of high bog surface wetness appear to have occurred at c. 3100,3010–2990,2300, 1750–1610, 1510, 1410, 1110, 540 and 310 cal. yr BP, during four longer periods between c. 3170 and 2850 cal. yr BP, 2450 and 2000 cal. yr BP, 1770 and 1530 cal. yr BP and in the period from 880 cal. yr BP until the present. In the period between 1770 and 1530 cal. yr BP, the extension or initiation of a hollow microtope occurred, which corresponds with other research results from Mannikjarve bog. This and other changes towards increasing bog surface wetness may be the responses to colder temperatures and the predominance of a more continental climate in the region, which favoured the development of bog micro‐depressions and a complex bog microtopography. Located in the border zone of oceanic and continental climatic sectors, in an area almost without land uplift, this study site may provide valuable information about changes in palaeohydrological and palaeoclimatological conditions in the northern parts of the eastern Baltic Sea region. |
| |
| Keywords: | |
|
|
