Format:
Online-Ressource (PDF-Datei: 172 S., 8401 KB)
,
Ill., graph. Darst., Kt.
Content:
Paläoozeanographie, Foraminiferen, Grönland, Holozän
Content:
is critical due to scenarios of future climate warming and the consequent contribution of Greenland ice sheet melting to sea-level rise and its potential to influence thermohaline circulation. This thesis investigates the role of ocean forcing by the West Greenland Current (WGC) on the dynamics of West Greenland ice sheet behavior, with focus on Jakobshavn Isbræ, in the Disko Bugt area of central West Greenland. High-resolution sediment cores, obtained during a cruise of the RV 'Maria S. Merian' in 2007, provide a long-term Holocene perspective on climate variability off West Greenland. These records cover the last 8000 years with increasing resolution through to periods of historical and instrumental data series. Paleoenvironmental reconstructions, based on the calcareous and agglutinated benthic foraminiferal assemblage, reveal significant variations in the water mass properties (e.g. temperature and salinity) of the WGC. From 8 to 6 cal. ka BP, a relatively warm WGC enhances meltwater production (ice retreat) in Disko Bugt. Holocene 'thermal optimum-like' conditions prevailed from 5.5 to 3.5 cal. ka BP, associated with minimum ice sheet extent in eastern Disko Bugt. Long-term cooling of oceanographic conditions is recognized from c. 3.5 cal. ka BP towards the present day. Superimposed ...
Note:
Greifswald, Univ., Diss., 2012
Additional Edition:
Druckausg. Holocene interaction between ocean circulation and the West Greenland ice sheet
Additional Edition:
Druckausg. Perner, Kerstin Holocene interaction between ocean circulation and the West Greenland ice sheet 2012
Language:
English
Keywords:
Grönland
;
Eisdecke
;
Holozän
;
Meeresströmung
;
Paläoklima
;
Zirkulation
;
Hochschulschrift
URN:
urn:nbn:de:gbv:9-001298-2
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