dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Hoek, W.Z. | |
dc.contributor.advisor | Peterse, F. | |
dc.contributor.author | Maas, D.J. | |
dc.date.accessioned | 2015-08-24T17:01:03Z | |
dc.date.available | 2015-08-24T17:01:03Z | |
dc.date.issued | 2015 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/21211 | |
dc.description.abstract | Llangorse Lake, Wales, is a lake which formed after the glacier retreat following the
LGM, upstream in the Afon Llynfi valley, at the edge of the River Wye catchment. The
lake has been previously cored, from which it was shown that it contained sediments
older than the Preboreal, which is the oldest date currently available for Llangorse
Lake sediments.
Using a combination of loss on ignition (LOI) – and organic geochemical
analysis methods, an attempt is made to reconstruct Late Pleistocene air
temperatures based on branched glycerol dialkyl glycerol tetraether (brGDGT)
membrane lipids from bacteria living in soils and the water column.
An end-member mixing model is proposed to separate the two sources of
bacterial membrane lipids, which end up in the sedimentary archive. This correction
method shows promising results for the applicability of brGDGT membrane lipids in
lacustrine environments.
The reconstructed temperatures show a comparable signature of Late
Pleistocene air temperatures as found from other proxy methods and sedimentary
archives. | |
dc.description.sponsorship | Utrecht University | |
dc.format.extent | 3480381 | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.title | Reconstructing Late Pleistocene air temperature variability in SW-Britain based on branched GDGTs in the sedimentary record of Llangorse Lake (Wales) | |
dc.type.content | Master Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | Lateglacial, Late Pleistocene, Younger Dryas, GS-1, Early Holocene, Loss on Ignition, LOI, GDGT, Llangorse Lake, Wales, MAT, air temperature | |
dc.subject.courseuu | Earth, Life and Climate | |