Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland).
The medieval Norse colonization of Greenland (986-1450 AD) and the subsequent reestablishment of agriculture in south Greenland, aided by recent climate warming, constitute a conceptual model that is particularly well adapted to understanding the relations between a community and its environment. In...
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Online Access: | https://theses.hal.science/tel-01088397 https://theses.hal.science/tel-01088397/document https://theses.hal.science/tel-01088397/file/these_massa_V3.pdf |
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ftunivnantes:oai:HAL:tel-01088397v1 2023-05-15T16:27:18+02:00 Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). Variabilité climatique holocène et impacts anthropiques historiques en zone subarctique. Étude multiparamètre de la séquence sédimentaire du lac d’Igaliku (Groenland) Massa, Charly Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Université de Franche-Comté Hervé Richard Vincent Bichet 2012-07-06 https://theses.hal.science/tel-01088397 https://theses.hal.science/tel-01088397/document https://theses.hal.science/tel-01088397/file/these_massa_V3.pdf fr fre HAL CCSD tel-01088397 https://theses.hal.science/tel-01088397 https://theses.hal.science/tel-01088397/document https://theses.hal.science/tel-01088397/file/these_massa_V3.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01088397 Interfaces continentales, environnement. Université de Franche-Comté, 2012. Français. ⟨NNT : ⟩ Greenland lake deposits Norse settlement agriculture climate change -anthropogenic landscape erosion Groenland sédimentation lacustre colonisation viking climat anthropisation [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/doctoralThesis Theses 2012 ftunivnantes 2023-02-08T10:58:01Z The medieval Norse colonization of Greenland (986-1450 AD) and the subsequent reestablishment of agriculture in south Greenland, aided by recent climate warming, constitute a conceptual model that is particularly well adapted to understanding the relations between a community and its environment. In this perspective, a multi-parameter sedimentological study was undertaken on the sedimentary sequence of Lake Igaliku (N61°00’22”, W45°26’28”), situated in the heart of the medieval and current agricultural sector. The 4 m long sequence, covering the entire Holocene evolution of the lake (~10 000 years), was studied at high temporal resolution. The analyses included the physico-chemical characterization of the sediments (density, magnetic susceptibility, XRF, X-ray imaging, grainsize, carbon, nitrogen, and sulphur content, ICP-AES, δ13C and δ15N isotopic ratios) as well as the biological components of the sediment (pollen, non-pollen palynomorphs, diatoms). 28 radiocarbon dates as well as 210Pb and 137Cs measurements created a precise temporal framework with which to reconstruct the postglacial evolution of the lake and its catchment in terms of isostatic constraints, climatic forcing and anthropogenic impacts. The first phase of basin evolution is primarily controlled by isostasy, with the rapid transition from glaciomarine conditions to a freshwater lake as the basin emerged from the fjord 9500 yr BP. Afterwards, the sedimentary sequence records the paleoclimatic evolution of the region. Paleolimnological and terrestrial proxies suggest an early warm phase likely interrupted by a cold, windy, dry period between 8600 yr BP and 8100 yr BP. A second dry, windy period between 5300 yr BP and 4800 yr BP predated the transition to neoglacial cooling, which is characterised at Igaliku by a switch to humid and perhaps cooler conditions after 4800 BP, and which caused a major shift in both aquatic and terrestrial ecology. Approximately 1000 AD, after the arrival of Norse settlers, the lacustrine system became ... Doctoral or Postdoctoral Thesis Greenland Groenland Igaliku subarctique* Université de Nantes: HAL-UNIV-NANTES Greenland Igaliku ENVELOPE(-45.421,-45.421,60.988,60.988) |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Greenland lake deposits Norse settlement agriculture climate change -anthropogenic landscape erosion Groenland sédimentation lacustre colonisation viking climat anthropisation [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
Greenland lake deposits Norse settlement agriculture climate change -anthropogenic landscape erosion Groenland sédimentation lacustre colonisation viking climat anthropisation [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Massa, Charly Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). |
topic_facet |
Greenland lake deposits Norse settlement agriculture climate change -anthropogenic landscape erosion Groenland sédimentation lacustre colonisation viking climat anthropisation [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
The medieval Norse colonization of Greenland (986-1450 AD) and the subsequent reestablishment of agriculture in south Greenland, aided by recent climate warming, constitute a conceptual model that is particularly well adapted to understanding the relations between a community and its environment. In this perspective, a multi-parameter sedimentological study was undertaken on the sedimentary sequence of Lake Igaliku (N61°00’22”, W45°26’28”), situated in the heart of the medieval and current agricultural sector. The 4 m long sequence, covering the entire Holocene evolution of the lake (~10 000 years), was studied at high temporal resolution. The analyses included the physico-chemical characterization of the sediments (density, magnetic susceptibility, XRF, X-ray imaging, grainsize, carbon, nitrogen, and sulphur content, ICP-AES, δ13C and δ15N isotopic ratios) as well as the biological components of the sediment (pollen, non-pollen palynomorphs, diatoms). 28 radiocarbon dates as well as 210Pb and 137Cs measurements created a precise temporal framework with which to reconstruct the postglacial evolution of the lake and its catchment in terms of isostatic constraints, climatic forcing and anthropogenic impacts. The first phase of basin evolution is primarily controlled by isostasy, with the rapid transition from glaciomarine conditions to a freshwater lake as the basin emerged from the fjord 9500 yr BP. Afterwards, the sedimentary sequence records the paleoclimatic evolution of the region. Paleolimnological and terrestrial proxies suggest an early warm phase likely interrupted by a cold, windy, dry period between 8600 yr BP and 8100 yr BP. A second dry, windy period between 5300 yr BP and 4800 yr BP predated the transition to neoglacial cooling, which is characterised at Igaliku by a switch to humid and perhaps cooler conditions after 4800 BP, and which caused a major shift in both aquatic and terrestrial ecology. Approximately 1000 AD, after the arrival of Norse settlers, the lacustrine system became ... |
author2 |
Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Université de Franche-Comté Hervé Richard Vincent Bichet |
format |
Doctoral or Postdoctoral Thesis |
author |
Massa, Charly |
author_facet |
Massa, Charly |
author_sort |
Massa, Charly |
title |
Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). |
title_short |
Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). |
title_full |
Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). |
title_fullStr |
Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). |
title_full_unstemmed |
Holocene environmental change and historical human impacts. A multiproxy study from Lake Igaliku (South Greenland). |
title_sort |
holocene environmental change and historical human impacts. a multiproxy study from lake igaliku (south greenland). |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://theses.hal.science/tel-01088397 https://theses.hal.science/tel-01088397/document https://theses.hal.science/tel-01088397/file/these_massa_V3.pdf |
long_lat |
ENVELOPE(-45.421,-45.421,60.988,60.988) |
geographic |
Greenland Igaliku |
geographic_facet |
Greenland Igaliku |
genre |
Greenland Groenland Igaliku subarctique* |
genre_facet |
Greenland Groenland Igaliku subarctique* |
op_source |
https://theses.hal.science/tel-01088397 Interfaces continentales, environnement. Université de Franche-Comté, 2012. Français. ⟨NNT : ⟩ |
op_relation |
tel-01088397 https://theses.hal.science/tel-01088397 https://theses.hal.science/tel-01088397/document https://theses.hal.science/tel-01088397/file/these_massa_V3.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766016443334262784 |