Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps
The variability of glacier response to atmospheric temperature rise in different topo-climatic settings is still a matter of debate. To address this question in the Central Italian Alps, we compile a post-LIA (Little Ice Age) multitemporal glacier inventory (1860–1954–1990–2003–2007) along a latitud...
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Copernicus Publications
2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00018109 2023-05-15T18:32:33+02:00 Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps Scotti, R. Brardinoni, F. Crosta, G. B. 2014-12 electronic https://doi.org/10.5194/tc-8-2235-2014 https://noa.gwlb.de/receive/cop_mods_00018109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018064/tc-8-2235-2014.pdf https://tc.copernicus.org/articles/8/2235/2014/tc-8-2235-2014.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-8-2235-2014 https://noa.gwlb.de/receive/cop_mods_00018109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018064/tc-8-2235-2014.pdf https://tc.copernicus.org/articles/8/2235/2014/tc-8-2235-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/tc-8-2235-2014 2022-02-08T22:53:20Z The variability of glacier response to atmospheric temperature rise in different topo-climatic settings is still a matter of debate. To address this question in the Central Italian Alps, we compile a post-LIA (Little Ice Age) multitemporal glacier inventory (1860–1954–1990–2003–2007) along a latitudinal transect that originates north of the continental divide in the Livigno Mountains and extends south through the Disgrazia and Orobie ranges, encompassing continental-to-maritime climatic settings. In these sub-regions, we examine the area change of 111 glaciers. Overall, the total glacierized area has declined from 34.1 to 10.1 km2, with a substantial increase in the number of small glaciers due to fragmentation. The average annual decrease (AAD) in glacier area has risen by about 1 order of magnitude from 1860–1990 (Livigno: 0.45; Orobie: 0.42; and Disgrazia: 0.39 % a−1) to 1990–2007 (Livigno: 3.08; Orobie: 2.44; and Disgrazia: 2.27 % a−1). This ranking changes when considering glaciers smaller than 0.5 km2 only (i.e., we remove the confounding caused by large glaciers in Disgrazia), so that post-1990 AAD follows the latitudinal gradient and Orobie glaciers stand out (Livigno: 4.07; Disgrazia: 3.57; and Orobie: 2.47 % a−1). More recent (2007–2013) field-based mass balances in three selected small glaciers confirm post-1990 trends showing the consistently highest retreat in continental Livigno and minimal area loss in maritime Orobie, with Disgrazia displaying transitional behavior. We argue that the recent resilience of glaciers in Orobie is a consequence of their decoupling from synoptic atmospheric temperature trends, a decoupling that arises from the combination of local topographic configuration (i.e., deep, north-facing cirques) and high winter precipitation, which ensures high snow-avalanche supply, as well as high summer shading and sheltering. Our hypothesis is further supported by the lack of correlations between glacier change and glacier attributes in Orobie, as well as by the higher variability in ELA,sub>0 positioning, post-LIA glacier change, and interannual mass balances, as we move southward along the transect. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA Ela ENVELOPE(9.642,9.642,63.170,63.170) The Cryosphere 8 6 2235 2252 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Scotti, R. Brardinoni, F. Crosta, G. B. Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps |
topic_facet |
article Verlagsveröffentlichung |
description |
The variability of glacier response to atmospheric temperature rise in different topo-climatic settings is still a matter of debate. To address this question in the Central Italian Alps, we compile a post-LIA (Little Ice Age) multitemporal glacier inventory (1860–1954–1990–2003–2007) along a latitudinal transect that originates north of the continental divide in the Livigno Mountains and extends south through the Disgrazia and Orobie ranges, encompassing continental-to-maritime climatic settings. In these sub-regions, we examine the area change of 111 glaciers. Overall, the total glacierized area has declined from 34.1 to 10.1 km2, with a substantial increase in the number of small glaciers due to fragmentation. The average annual decrease (AAD) in glacier area has risen by about 1 order of magnitude from 1860–1990 (Livigno: 0.45; Orobie: 0.42; and Disgrazia: 0.39 % a−1) to 1990–2007 (Livigno: 3.08; Orobie: 2.44; and Disgrazia: 2.27 % a−1). This ranking changes when considering glaciers smaller than 0.5 km2 only (i.e., we remove the confounding caused by large glaciers in Disgrazia), so that post-1990 AAD follows the latitudinal gradient and Orobie glaciers stand out (Livigno: 4.07; Disgrazia: 3.57; and Orobie: 2.47 % a−1). More recent (2007–2013) field-based mass balances in three selected small glaciers confirm post-1990 trends showing the consistently highest retreat in continental Livigno and minimal area loss in maritime Orobie, with Disgrazia displaying transitional behavior. We argue that the recent resilience of glaciers in Orobie is a consequence of their decoupling from synoptic atmospheric temperature trends, a decoupling that arises from the combination of local topographic configuration (i.e., deep, north-facing cirques) and high winter precipitation, which ensures high snow-avalanche supply, as well as high summer shading and sheltering. Our hypothesis is further supported by the lack of correlations between glacier change and glacier attributes in Orobie, as well as by the higher variability in ELA,sub>0 positioning, post-LIA glacier change, and interannual mass balances, as we move southward along the transect. |
format |
Article in Journal/Newspaper |
author |
Scotti, R. Brardinoni, F. Crosta, G. B. |
author_facet |
Scotti, R. Brardinoni, F. Crosta, G. B. |
author_sort |
Scotti, R. |
title |
Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps |
title_short |
Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps |
title_full |
Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps |
title_fullStr |
Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps |
title_full_unstemmed |
Post-LIA glacier changes along a latitudinal transect in the Central Italian Alps |
title_sort |
post-lia glacier changes along a latitudinal transect in the central italian alps |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-2235-2014 https://noa.gwlb.de/receive/cop_mods_00018109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018064/tc-8-2235-2014.pdf https://tc.copernicus.org/articles/8/2235/2014/tc-8-2235-2014.pdf |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) |
geographic |
Ela |
geographic_facet |
Ela |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-8-2235-2014 https://noa.gwlb.de/receive/cop_mods_00018109 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018064/tc-8-2235-2014.pdf https://tc.copernicus.org/articles/8/2235/2014/tc-8-2235-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-8-2235-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
6 |
container_start_page |
2235 |
op_container_end_page |
2252 |
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1766216707289907200 |