Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords
International audience The Alps represent the largest barrier to meridional air flow in Europe, strongly influencing the weather and hence the distribution of atmospheric trace components. Here for the first time, chemical records from two ice cores retrieved from glaciers located in the northern an...
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ftinsu:oai:HAL:hal-00300857v1 2024-02-04T10:01:13+01:00 Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords Eichler, A. Schwikowski, M. Furger, M. Schotterer, U. Gäggeler, H. W. Paul Scherrer Institute (PSI) Department of Chemistry and Biochemistry Universität Bern / University of Bern (UNIBE) 2004-01-07 https://hal.science/hal-00300857 https://hal.science/hal-00300857/document https://hal.science/hal-00300857/file/acpd-4-71-2004.pdf en eng HAL CCSD European Geosciences Union hal-00300857 https://hal.science/hal-00300857 https://hal.science/hal-00300857/document https://hal.science/hal-00300857/file/acpd-4-71-2004.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00300857 Atmospheric Chemistry and Physics Discussions, 2004, 4 (1), pp.71-108 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2004 ftinsu 2024-01-10T17:26:14Z International audience The Alps represent the largest barrier to meridional air flow in Europe, strongly influencing the weather and hence the distribution of atmospheric trace components. Here for the first time, chemical records from two ice cores retrieved from glaciers located in the northern and southern Swiss Alps were compared in conjunction with an analysis of "weather type", in order to assess geographical and seasonal trends in the deposition of trace species and to identify source regions and transport patterns. Using a correlation analysis, investigated trace species (NH 4 + , NO 3 ? , SO 4 2? , Ca 2+ , Mg 2+ , Na + , K + , and Cl ? were grouped into classes of different origin (anthropogenic, sea salt, or Saharan dust). Over the last 60 years, precipitation chemistry at both sites was dominated by NH 4 + , NO 4 ? , and SO 4 2? , all of anthropogenic origin and deposited mainly in summer by way of convective precipitation. The similarity of the SO 4 2? profiles with historical records of SO 4 emissions from France and Italy indicated these two countries as key source areas for the anthropogenic species. In contrast, sea salt and Saharan dust showed major differences in transport pattern and deposition across the Alps. Currently, the sea-salt constituents Na + , K + , and Cl ? are transported to the northern site during advective westerly-wind situations, independent of Saharan dust events. At the southern site, sea salt and Saharan dust are deposited simultaneously, indicating a coupled transport active mainly in summer during south-westerly wind situations. Article in Journal/Newspaper ice core Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Eichler, A. Schwikowski, M. Furger, M. Schotterer, U. Gäggeler, H. W. Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The Alps represent the largest barrier to meridional air flow in Europe, strongly influencing the weather and hence the distribution of atmospheric trace components. Here for the first time, chemical records from two ice cores retrieved from glaciers located in the northern and southern Swiss Alps were compared in conjunction with an analysis of "weather type", in order to assess geographical and seasonal trends in the deposition of trace species and to identify source regions and transport patterns. Using a correlation analysis, investigated trace species (NH 4 + , NO 3 ? , SO 4 2? , Ca 2+ , Mg 2+ , Na + , K + , and Cl ? were grouped into classes of different origin (anthropogenic, sea salt, or Saharan dust). Over the last 60 years, precipitation chemistry at both sites was dominated by NH 4 + , NO 4 ? , and SO 4 2? , all of anthropogenic origin and deposited mainly in summer by way of convective precipitation. The similarity of the SO 4 2? profiles with historical records of SO 4 emissions from France and Italy indicated these two countries as key source areas for the anthropogenic species. In contrast, sea salt and Saharan dust showed major differences in transport pattern and deposition across the Alps. Currently, the sea-salt constituents Na + , K + , and Cl ? are transported to the northern site during advective westerly-wind situations, independent of Saharan dust events. At the southern site, sea salt and Saharan dust are deposited simultaneously, indicating a coupled transport active mainly in summer during south-westerly wind situations. |
author2 |
Paul Scherrer Institute (PSI) Department of Chemistry and Biochemistry Universität Bern / University of Bern (UNIBE) |
format |
Article in Journal/Newspaper |
author |
Eichler, A. Schwikowski, M. Furger, M. Schotterer, U. Gäggeler, H. W. |
author_facet |
Eichler, A. Schwikowski, M. Furger, M. Schotterer, U. Gäggeler, H. W. |
author_sort |
Eichler, A. |
title |
Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords |
title_short |
Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords |
title_full |
Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords |
title_fullStr |
Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords |
title_full_unstemmed |
Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords |
title_sort |
sources and distribution of trace species in alpine precipitation inferred from two 60-year ice core paleorecords |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00300857 https://hal.science/hal-00300857/document https://hal.science/hal-00300857/file/acpd-4-71-2004.pdf |
genre |
ice core |
genre_facet |
ice core |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00300857 Atmospheric Chemistry and Physics Discussions, 2004, 4 (1), pp.71-108 |
op_relation |
hal-00300857 https://hal.science/hal-00300857 https://hal.science/hal-00300857/document https://hal.science/hal-00300857/file/acpd-4-71-2004.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1789966943441125376 |