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  4. Holocene changes in sea-ice cover and polynya formation along the eastern North Greenland shelf: New insights from biomarker records
 
Zitierlink DOI
10.26092/elib/335
Verlagslink DOI
10.1016/j.quascirev.2020.106173

Holocene changes in sea-ice cover and polynya formation along the eastern North Greenland shelf: New insights from biomarker records

Veröffentlichungsdatum
2020-01-30
Autoren
Syring, Nicole  
Stein, Ruediger  
Fahl, Kirsten  
Vahlenkamp, Maximilian  
Zehnich, Marc  
Spielhagen, Robert  
Niessen, Frank  
Zusammenfassung
Understanding the processes controlling the natural variability of sea ice in the Arctic, one of the most dynamic components of the climate system, can help to constrain the effects of future climate change in this highly sensitive area. For the first time, a high-resolution biomarker study was carried out to reconstruct past sea-ice variability off eastern North Greenland. This area is strongly influenced by cold surface waters and drift ice transported via the East Greenland Current, meltwater pulses from the outlet glaciers of the Northeast Greenland Ice Stream and the build-up of landfast ice. The well-dated Holocene sedimentary section of Core PS93/025 provides insights into variations of the sea-ice conditions (regional and local sea-ice signal), oceanic and atmospheric circulation and the biotic response to these changes. These biomarker records show a reduced to variable sea-ice cover during the early Holocene between 10.2 and 9.3 ka, followed by a steady increase in sea-ice conditions during the mid Holocene. During the last 5e6 ka, sea-ice conditions remained more stable representing a seasonal to marginal sea-ice situ- ation. Based on our biomarker records, stable sea-ice edge conditions, with a fully developed polynya situation occurred since the last 1 ka.
Schlagwörter
Sea ice

; 

Biomarker

; 

Northeast Water Polynya

; 

Northeast Greenland
Fachbereich
Fachbereich 05: Geowissenschaften (FB 05)  
Institute
Alfred-Wegener Institut  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Quaternary Science Reviews  
Heft
231
Startseite
1
Endseite
16
Zweitveröffentlichung
Nein
Lizenz
http://creativecommons.org/licenses/by/3.0/de/
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

Syring_2019_Holocene changes sea-ice cover .pdf

Size

4.49 MB

Format

Adobe PDF

Checksum

(MD5):f78400423e909e22e671876baf4afb39

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