Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit
A Statistical analysis of published and compilated snowline data for the late-glacial Stades of Gschnitz, Clavadel, Daun and Egesen is presented. The calculation of snowline and snowline-depression (compared to the extent of 1850) is based on the 2: 1 -equilibrium line method. The Interpretation doe...
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ftdoajarticles:oai:doaj.org/article:861b37fe9af746958e8588b2ecffd375 2023-05-15T15:44:30+02:00 Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit G. Furrer C. Burga M. Gamper H.-P. Holzhauser M. Maisch https://doi.org/10.5194/gh-42-61-1987 https://doaj.org/article/861b37fe9af746958e8588b2ecffd375 DE EN FR IT ger eng fre ita Copernicus Publications http://www.geogr-helv.net/42/61/1987/gh-42-61-1987.pdf https://doaj.org/toc/0016-7312 https://doaj.org/toc/2194-8798 0016-7312 2194-8798 doi:10.5194/gh-42-61-1987 https://doaj.org/article/861b37fe9af746958e8588b2ecffd375 Geographica Helvetica, Vol 42, Iss 2, Pp 61-91 Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 article ftdoajarticles https://doi.org/10.5194/gh-42-61-1987 2022-12-31T10:49:13Z A Statistical analysis of published and compilated snowline data for the late-glacial Stades of Gschnitz, Clavadel, Daun and Egesen is presented. The calculation of snowline and snowline-depression (compared to the extent of 1850) is based on the 2: 1 -equilibrium line method. The Interpretation does not show significant differences in snowline-depression between the Lower Engadin (Eastern Alps) and the Mont Blanc area (Western Alps). The larger deviations from the averages can be explained by the glacier individuality (morphology, topography of the ice surfaces) and the rarely considered variations ot the "constant" 2 :1-ration. Geographical patterns, which could imply changes in paleo-precipitation, cannot be found in the investigated area. The Quaternary Vegetation history provides evidence for climatic changes and timberline fluctuations which took place during the Late-Glacial and Holocene and also provides a framework for biostratigraphical results. During the Oldest Dryas a heliophile Artemisia-Chenopodiceae-Helianthemum- Thalictrum-Ephedra-Juniperus-Betula nana pioneer Vegetation covered the icefree areas in Switzerland. The oldest pollen spectra found in clay gyttja Sediments are dated between 13,000 and 14,000 y BP by the radiocarbon method. The development of the Swiss Central Alpine wood belt since the Late-Glacial is shown in Fig. 11. Postglacial alterations of the geomorphological activity in the Alps can be reconstructed by radiocarbon dating of fossil soils found in moraines. earth-flows and talus deposits. The results show that the geomorphological activity was very slow up to 4500 y BP; but the second part of the postglacial period was marked by often changing phases of activity and stability. Differing qualities of the evidence relating to glacial history and the absence of glacier advances within several periods of the Holocene make it impossible to reconstruct a complete curve of the glacier movements. With the aid of a graphical diagram which includes both evidence on glacier fluctuations ... Article in Journal/Newspaper Betula nana Directory of Open Access Journals: DOAJ Articles Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) Geographica Helvetica 42 2 61 91 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
German English French Italian |
topic |
Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 |
spellingShingle |
Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 G. Furrer C. Burga M. Gamper H.-P. Holzhauser M. Maisch Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit |
topic_facet |
Human ecology. Anthropogeography GF1-900 Geography (General) G1-922 Cartography GA101-1776 |
description |
A Statistical analysis of published and compilated snowline data for the late-glacial Stades of Gschnitz, Clavadel, Daun and Egesen is presented. The calculation of snowline and snowline-depression (compared to the extent of 1850) is based on the 2: 1 -equilibrium line method. The Interpretation does not show significant differences in snowline-depression between the Lower Engadin (Eastern Alps) and the Mont Blanc area (Western Alps). The larger deviations from the averages can be explained by the glacier individuality (morphology, topography of the ice surfaces) and the rarely considered variations ot the "constant" 2 :1-ration. Geographical patterns, which could imply changes in paleo-precipitation, cannot be found in the investigated area. The Quaternary Vegetation history provides evidence for climatic changes and timberline fluctuations which took place during the Late-Glacial and Holocene and also provides a framework for biostratigraphical results. During the Oldest Dryas a heliophile Artemisia-Chenopodiceae-Helianthemum- Thalictrum-Ephedra-Juniperus-Betula nana pioneer Vegetation covered the icefree areas in Switzerland. The oldest pollen spectra found in clay gyttja Sediments are dated between 13,000 and 14,000 y BP by the radiocarbon method. The development of the Swiss Central Alpine wood belt since the Late-Glacial is shown in Fig. 11. Postglacial alterations of the geomorphological activity in the Alps can be reconstructed by radiocarbon dating of fossil soils found in moraines. earth-flows and talus deposits. The results show that the geomorphological activity was very slow up to 4500 y BP; but the second part of the postglacial period was marked by often changing phases of activity and stability. Differing qualities of the evidence relating to glacial history and the absence of glacier advances within several periods of the Holocene make it impossible to reconstruct a complete curve of the glacier movements. With the aid of a graphical diagram which includes both evidence on glacier fluctuations ... |
format |
Article in Journal/Newspaper |
author |
G. Furrer C. Burga M. Gamper H.-P. Holzhauser M. Maisch |
author_facet |
G. Furrer C. Burga M. Gamper H.-P. Holzhauser M. Maisch |
author_sort |
G. Furrer |
title |
Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit |
title_short |
Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit |
title_full |
Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit |
title_fullStr |
Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit |
title_full_unstemmed |
Zur Gletscher-, Vegetations- und Klimageschichte der Schweiz seit der Späteiszeit |
title_sort |
zur gletscher-, vegetations- und klimageschichte der schweiz seit der späteiszeit |
publisher |
Copernicus Publications |
url |
https://doi.org/10.5194/gh-42-61-1987 https://doaj.org/article/861b37fe9af746958e8588b2ecffd375 |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
Betula nana |
genre_facet |
Betula nana |
op_source |
Geographica Helvetica, Vol 42, Iss 2, Pp 61-91 |
op_relation |
http://www.geogr-helv.net/42/61/1987/gh-42-61-1987.pdf https://doaj.org/toc/0016-7312 https://doaj.org/toc/2194-8798 0016-7312 2194-8798 doi:10.5194/gh-42-61-1987 https://doaj.org/article/861b37fe9af746958e8588b2ecffd375 |
op_doi |
https://doi.org/10.5194/gh-42-61-1987 |
container_title |
Geographica Helvetica |
container_volume |
42 |
container_issue |
2 |
container_start_page |
61 |
op_container_end_page |
91 |
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1766378882075721728 |