KOPRI Repository

Holocene records of marine-terrestrial palynomorphs from the Chukchi Sea shelf sediments, western Arctic Ocean

Metadata Downloads
Title
Holocene records of marine-terrestrial palynomorphs from the Chukchi Sea shelf sediments, western Arctic Ocean
Authors
Kim, So-Young
Nam, Seung-Il
Polyak, Leonid
Delusina, Irina
Issue Date
2015
Citation
Kim, So-Young., et al. 2015. Holocene records of marine-terrestrial palynomorphs from the Chukchi Sea shelf sediments, western Arctic Ocean. 2015 Joint conference of The Korean Association of Ocean Science and TEchnology Society, JeJu International convention center, JeJu. 2015.05.21-22.
Abstract
Palynomorphs preserved in sedimentary archives represent one of the most useful tools in reconstruction of past environmental and climatic changes. In particular, records of marine-terrestrial palynomorphs such as dinoflagellate cysts, pollen, spores and freshwater algae in the Chukchi-Alaskan sea shelf sediments are suggested to be important and under-exploited palaeoclimate archives, potentially inferring the opening of the Bering Strait and the onset of high riverine inputs to the shelf region since the last deglaciation. In this study, we present new marine-terrestrial palynomorph records from the Chukchi-Alaskan shelf sediments in order to understand flooding events over the Chukchi-Alaskan shelves and the opening of the Bering Strait since the last deglaciation, as well as major vegetational changes over the western Arctic region covering the Chukchi Peninsula and northwest Alaska. Using a radiocarbon-dated sediment core, we demonstrate changes in characteristics of the palynomorph records and discuss their possible source areas with its transportation mechanisms. We speculate that drastic changes in concentration of pollen and spores indicates considerable changes in vegetation over the catchment area including the territories of both North America (Alaska and Northern Canadian Arctic) and Northern Siberia (Chukotka peninsula and Northern East-Siberian coast) during the last 10 kyr BP. In parallel, dinoflagellate cyst records document significant changes in the marine environments, typically for a prominent increase in dinoflagellate cyst concentrations concomitant with high total organic carbon and nitrogen contents since the early Holocene suggesting increased nutrient inputs and marine productivity in the study area.
Conference Name
2015 Joint conference of The Korean Association of Ocean Science and TEchnology Society,
Conference Place
JeJu International convention center, JeJu
Conference Date
2015.05.21-22.
Files in This Item
There are no files associated with this item.
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse