Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses
Subfossil pollen from two bogs in temperature-sensitive, high-altitude regions were analysed in order to reconstruct early-to mid-Holocene summer temperature fluctuations in the Eastern Alps. The pollen records showed four centennial-scale cooling intervals with low growing-season temperatures, resu...
Published in: | The Holocene |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2005
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1191/0959683605hl852ft http://journals.sagepub.com/doi/pdf/10.1191/0959683605hl852ft |
id |
crsagepubl:10.1191/0959683605hl852ft |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1191/0959683605hl852ft 2023-05-15T16:30:08+02:00 Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses Kofler, Werner Krapf, Veronika Oberhuber, Walter Bortenschlager, Sigmar 2005 http://dx.doi.org/10.1191/0959683605hl852ft http://journals.sagepub.com/doi/pdf/10.1191/0959683605hl852ft en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 15, issue 6, page 779-788 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2005 crsagepubl https://doi.org/10.1191/0959683605hl852ft 2022-08-12T11:31:58Z Subfossil pollen from two bogs in temperature-sensitive, high-altitude regions were analysed in order to reconstruct early-to mid-Holocene summer temperature fluctuations in the Eastern Alps. The pollen records showed four centennial-scale cooling intervals with low growing-season temperatures, resulting in decreasing pollen production and/or lower treeline position during the period 9000-6000 cal. BP. For the first time, the 8200 cal. BP cold event and an equivalent to the Misox cold phase in the Swiss Alps were detected in the Eastern Alps. The oscillations recorded in the pollen curves for Swiss stone pine (Pinus cembra) and sedges (Cyperaceae) at c. 8200 cal. BP match, in time and magnitude, the δ 18 O excursion in the Greenland GRIP ice-core record as well as sea-surface cooling in the North Atlantic. The close congruence between the pollen records covering 3000 years and climate proxy-data from both Hemispheres indicates that large-scale environmental changes, possibly caused by North Atlantic freshwater pulses and/or fluctuations in solar activity, caused decreases in pollen production and/or treeline shifts in the Alps. Although the 8200 cal. BP climatic deterioration was of a global character, its impact on biological productivity of temperature-sensitive sites at high altitude has only rarely been demonstrated. The data indicate that pollen analyses near and above the timberline within high-altitude, herb-dominated plant communities are of considerable and yet largely unexplored potential to detect abrupt short-term as well as long-term climatic variations. Article in Journal/Newspaper Greenland GRIP ice core North Atlantic SAGE Publications (via Crossref) Greenland The Holocene 15 6 779 788 |
institution |
Open Polar |
collection |
SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
spellingShingle |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Kofler, Werner Krapf, Veronika Oberhuber, Walter Bortenschlager, Sigmar Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
Subfossil pollen from two bogs in temperature-sensitive, high-altitude regions were analysed in order to reconstruct early-to mid-Holocene summer temperature fluctuations in the Eastern Alps. The pollen records showed four centennial-scale cooling intervals with low growing-season temperatures, resulting in decreasing pollen production and/or lower treeline position during the period 9000-6000 cal. BP. For the first time, the 8200 cal. BP cold event and an equivalent to the Misox cold phase in the Swiss Alps were detected in the Eastern Alps. The oscillations recorded in the pollen curves for Swiss stone pine (Pinus cembra) and sedges (Cyperaceae) at c. 8200 cal. BP match, in time and magnitude, the δ 18 O excursion in the Greenland GRIP ice-core record as well as sea-surface cooling in the North Atlantic. The close congruence between the pollen records covering 3000 years and climate proxy-data from both Hemispheres indicates that large-scale environmental changes, possibly caused by North Atlantic freshwater pulses and/or fluctuations in solar activity, caused decreases in pollen production and/or treeline shifts in the Alps. Although the 8200 cal. BP climatic deterioration was of a global character, its impact on biological productivity of temperature-sensitive sites at high altitude has only rarely been demonstrated. The data indicate that pollen analyses near and above the timberline within high-altitude, herb-dominated plant communities are of considerable and yet largely unexplored potential to detect abrupt short-term as well as long-term climatic variations. |
format |
Article in Journal/Newspaper |
author |
Kofler, Werner Krapf, Veronika Oberhuber, Walter Bortenschlager, Sigmar |
author_facet |
Kofler, Werner Krapf, Veronika Oberhuber, Walter Bortenschlager, Sigmar |
author_sort |
Kofler, Werner |
title |
Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses |
title_short |
Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses |
title_full |
Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses |
title_fullStr |
Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses |
title_full_unstemmed |
Vegetation responses to the 8200 cal. BP cold event and to long-term climatic changes in the Eastern Alps: possible influence of solar activity and North Atlantic freshwater pulses |
title_sort |
vegetation responses to the 8200 cal. bp cold event and to long-term climatic changes in the eastern alps: possible influence of solar activity and north atlantic freshwater pulses |
publisher |
SAGE Publications |
publishDate |
2005 |
url |
http://dx.doi.org/10.1191/0959683605hl852ft http://journals.sagepub.com/doi/pdf/10.1191/0959683605hl852ft |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland GRIP ice core North Atlantic |
genre_facet |
Greenland GRIP ice core North Atlantic |
op_source |
The Holocene volume 15, issue 6, page 779-788 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1191/0959683605hl852ft |
container_title |
The Holocene |
container_volume |
15 |
container_issue |
6 |
container_start_page |
779 |
op_container_end_page |
788 |
_version_ |
1766019859264569344 |