Palynological evidence for Holocene climate variability in the Laptev and Kara Seas (Eurasian Arctic)


Contact
jmatthiessen [ at ] awi-bremerhaven.de

Abstract

Despite a growing interest in the paleoclimate evolution of the Holocene period in the Siberian sector of the Arctic Ocean relatively few data are available from marine records of the shallow Siberian shelf seas. Within the frame of the joint Russian-German projects "Geosystem Laptev Sea" and "Siberian River Run-off (SIRRO)" high-resolution records from the Kara and Laptev seas have been studied for their palynological contents in order to reconstruct sea-surface conditions and freshwater input from the large Siberian rivers during the Holocene.Holocene dinoflagellate cyst assemblages from both the Kara and Laptev Sea indicate the presence of a marine thermal optimum in the early Holocene. The onset occurred in the Laptev Sea shortly after the transition to the Holocene while sediment cores studied so far from the inner Kara Sea do not span this period. A long-term cooling in the mid and late Holocene is recognised in both shelf seas but, obviously, major steps did not occur synchronously. The records are characterised by few sub-millennia oscillations suggesting that conditions were relatively stable in the later part of the Holocene. Chlorococcalean algae reflect a variable freshwater input during the Holocene that was related to the post-glacial sea-level rise and retreat of the estuaries of the large rivers, Ob, Yenisei and Lena to their present positions.



Item Type
Conference (Poster)
Authors
Divisions
Programs
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
First SEARCH Open Science Meeting, October 27 - 30, Seattle, USA..
Eprint ID
9494
Cite as
Matthießen, J. , Kunz-Pirrung, M. and Kraus, M. (2003): Palynological evidence for Holocene climate variability in the Laptev and Kara Seas (Eurasian Arctic) , First SEARCH Open Science Meeting, October 27 - 30, Seattle, USA. .


Share

Research Platforms

Campaigns


Actions
Edit Item Edit Item