A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene
The Northern Isles are strongly influenced by changes in the North Atlantic Ocean atmosphere system and, as they project northwards from the British Isles, provide an ideal geographical opportunity to study changing climatic gradients during the last glacial/ interglacial transition along with the d...
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Language: | English |
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University of Stirling
2017
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Online Access: | http://hdl.handle.net/1893/25955 http://dspace.stir.ac.uk/bitstream/1893/25955/1/Thesis%20-%20FINAL.pdf |
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ftunivstirling:oai:dspace.stir.ac.uk:1893/25955 2023-05-15T15:17:45+02:00 A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene Kingsbury, Melanie Vanessa McCulloch, Robert Tisdall, Eileen Davies, Sarah 2017-06-23 application/pdf http://hdl.handle.net/1893/25955 http://dspace.stir.ac.uk/bitstream/1893/25955/1/Thesis%20-%20FINAL.pdf en eng University of Stirling http://hdl.handle.net/1893/25955 http://dspace.stir.ac.uk/bitstream/1893/25955/1/Thesis%20-%20FINAL.pdf 2019-01-01 I require time to write articles for publication from my thesis. 2019-02-02 Orkney Shetland Lateglacial Micropaleontology Diatoms Pollen µ-XRF Early Holocene North Atlantic Palaeolimnology Climate change Scotland Orkney (Scotland) Shetland (Scotland) Thesis or Dissertation Doctoral Doctor of Philosophy 2017 ftunivstirling 2022-06-13T18:45:22Z The Northern Isles are strongly influenced by changes in the North Atlantic Ocean atmosphere system and, as they project northwards from the British Isles, provide an ideal geographical opportunity to study changing climatic gradients during the last glacial/ interglacial transition along with the detection of regime shifts. Three proxies, diatoms, pollen, and micro-XRF sediment chemistry, have been employed to explore the nature and timing of environmental changes within the water columns and the wider catchments of Loch of Sabiston, Orkney, and Loch of Clumlie and Loch of Grimsetter, Shetland to better understand the nature and timing of environmental change within and among the island groups. The records are constrained by radiocarbon dating, supported by tephrochronology, and the Greenland ice core chronology to enable the comparison of the records produced by this study with previous research in the North Atlantic region. The diatom and lithological results from Loch of Sabiston suggest early deglaciation at c. 23,000 cal BP followed by gradual warming (GI-1e) punctuated by the cooling events coeval with GS-1 and GI-1b. However, the pollen record reflects a lagged response in the development from colonising cold tolerant vegetation to more temperate shrub and woodland communities. The Oracadian signal is dominated by the switching on and off of the accumulation of marl which serves as a supporting indicator of warmer conditions. The Shetland landscape appears to have been deglaciated later at c. 16,400 cal BP, but also has clear representation of GI-1e and the cooling events of GI-1b and GS-1. Both the Shetland and Orkney records record the dramatic cooling of the Younger Dryas but also suggest a two stage change from colder and drier to colder and wetter conditions before the onset of the Holocene. Shetland appears to have experienced less extreme climatic changes in comparison to Orkney despite being in the same present phytogeographical region. This is likely due to the former persisting in the arctic ... Doctoral or Postdoctoral Thesis Arctic Climate change Greenland Greenland ice core ice core North Atlantic University of Stirling: Stirling Digital Research Repository Arctic Greenland |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
Orkney Shetland Lateglacial Micropaleontology Diatoms Pollen µ-XRF Early Holocene North Atlantic Palaeolimnology Climate change Scotland Orkney (Scotland) Shetland (Scotland) |
spellingShingle |
Orkney Shetland Lateglacial Micropaleontology Diatoms Pollen µ-XRF Early Holocene North Atlantic Palaeolimnology Climate change Scotland Orkney (Scotland) Shetland (Scotland) Kingsbury, Melanie Vanessa A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene |
topic_facet |
Orkney Shetland Lateglacial Micropaleontology Diatoms Pollen µ-XRF Early Holocene North Atlantic Palaeolimnology Climate change Scotland Orkney (Scotland) Shetland (Scotland) |
description |
The Northern Isles are strongly influenced by changes in the North Atlantic Ocean atmosphere system and, as they project northwards from the British Isles, provide an ideal geographical opportunity to study changing climatic gradients during the last glacial/ interglacial transition along with the detection of regime shifts. Three proxies, diatoms, pollen, and micro-XRF sediment chemistry, have been employed to explore the nature and timing of environmental changes within the water columns and the wider catchments of Loch of Sabiston, Orkney, and Loch of Clumlie and Loch of Grimsetter, Shetland to better understand the nature and timing of environmental change within and among the island groups. The records are constrained by radiocarbon dating, supported by tephrochronology, and the Greenland ice core chronology to enable the comparison of the records produced by this study with previous research in the North Atlantic region. The diatom and lithological results from Loch of Sabiston suggest early deglaciation at c. 23,000 cal BP followed by gradual warming (GI-1e) punctuated by the cooling events coeval with GS-1 and GI-1b. However, the pollen record reflects a lagged response in the development from colonising cold tolerant vegetation to more temperate shrub and woodland communities. The Oracadian signal is dominated by the switching on and off of the accumulation of marl which serves as a supporting indicator of warmer conditions. The Shetland landscape appears to have been deglaciated later at c. 16,400 cal BP, but also has clear representation of GI-1e and the cooling events of GI-1b and GS-1. Both the Shetland and Orkney records record the dramatic cooling of the Younger Dryas but also suggest a two stage change from colder and drier to colder and wetter conditions before the onset of the Holocene. Shetland appears to have experienced less extreme climatic changes in comparison to Orkney despite being in the same present phytogeographical region. This is likely due to the former persisting in the arctic ... |
author2 |
McCulloch, Robert Tisdall, Eileen Davies, Sarah |
format |
Doctoral or Postdoctoral Thesis |
author |
Kingsbury, Melanie Vanessa |
author_facet |
Kingsbury, Melanie Vanessa |
author_sort |
Kingsbury, Melanie Vanessa |
title |
A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene |
title_short |
A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene |
title_full |
A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene |
title_fullStr |
A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene |
title_full_unstemmed |
A multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the Northern Isles from the end of the last glaciation through the early Holocene |
title_sort |
multiproxy palaeolimnological reconstruction of the nature and timing of climatic changes in the northern isles from the end of the last glaciation through the early holocene |
publisher |
University of Stirling |
publishDate |
2017 |
url |
http://hdl.handle.net/1893/25955 http://dspace.stir.ac.uk/bitstream/1893/25955/1/Thesis%20-%20FINAL.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Arctic Climate change Greenland Greenland ice core ice core North Atlantic |
op_relation |
http://hdl.handle.net/1893/25955 http://dspace.stir.ac.uk/bitstream/1893/25955/1/Thesis%20-%20FINAL.pdf |
op_rights |
2019-01-01 I require time to write articles for publication from my thesis. 2019-02-02 |
_version_ |
1766347991788027904 |