A local model of snow–firn dynamics and application to the Colle Gnifetti site
The regulating role of glaciers in catchment run-off is of fundamental importance in sustaining people living in low-lying areas. The reduction in glacierized areas under the effect of climate change disrupts the distribution and amount of run-off, threatening water supply, agriculture and hydropowe...
Published in: | The Cryosphere |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-16-1031-2022 https://noa.gwlb.de/receive/cop_mods_00060375 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060015/tc-16-1031-2022.pdf https://tc.copernicus.org/articles/16/1031/2022/tc-16-1031-2022.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00060375 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00060375 2023-05-15T18:32:33+02:00 A local model of snow–firn dynamics and application to the Colle Gnifetti site Banfi, Fabiola De Michele, Carlo 2022-03 electronic https://doi.org/10.5194/tc-16-1031-2022 https://noa.gwlb.de/receive/cop_mods_00060375 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060015/tc-16-1031-2022.pdf https://tc.copernicus.org/articles/16/1031/2022/tc-16-1031-2022.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-16-1031-2022 https://noa.gwlb.de/receive/cop_mods_00060375 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060015/tc-16-1031-2022.pdf https://tc.copernicus.org/articles/16/1031/2022/tc-16-1031-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-1031-2022 2022-03-21T00:08:51Z The regulating role of glaciers in catchment run-off is of fundamental importance in sustaining people living in low-lying areas. The reduction in glacierized areas under the effect of climate change disrupts the distribution and amount of run-off, threatening water supply, agriculture and hydropower. The prediction of these changes requires models that integrate hydrological, nivological and glaciological processes. In this work we propose a local model that combines the nivological and glaciological scales. The model describes the formation and evolution of the snowpack and the firn below it, under the influence of temperature, wind speed and precipitation. The model has been implemented in two versions: (1) a multi-layer one that considers separately each firn layer and (2) a single-layer one that models firn and underlying glacier ice as a single layer. The model was applied at the site of Colle Gnifetti (Monte Rosa massif, 4400–4550 ma.s.l.). We obtained an average reduction in annual snow accumulation due to wind erosion of 2×103 kgm-2yr-1 to be compared with a mean annual precipitation of about 2.7×103 kgm-2yr-1. The conserved accumulation is made up mainly of snow deposited between April and September, when temperatures above the melting point are also observed. End-of-year snow density, instead, increased an average of 65 kg m−3 when the contribution of wind to snow compaction was added. Observations show a high spatial and interannual variability in the characteristics of snow and firn at the site and a correlation of net balance with radiation and the number of melt layers. The computation of snowmelt in the model as a sole function of air temperature may therefore be one of the reasons for the observed mismatch between model and observations. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA Monte Rosa ENVELOPE(162.850,162.850,-70.917,-70.917) The Cryosphere 16 3 1031 1056 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Banfi, Fabiola De Michele, Carlo A local model of snow–firn dynamics and application to the Colle Gnifetti site |
topic_facet |
article Verlagsveröffentlichung |
description |
The regulating role of glaciers in catchment run-off is of fundamental importance in sustaining people living in low-lying areas. The reduction in glacierized areas under the effect of climate change disrupts the distribution and amount of run-off, threatening water supply, agriculture and hydropower. The prediction of these changes requires models that integrate hydrological, nivological and glaciological processes. In this work we propose a local model that combines the nivological and glaciological scales. The model describes the formation and evolution of the snowpack and the firn below it, under the influence of temperature, wind speed and precipitation. The model has been implemented in two versions: (1) a multi-layer one that considers separately each firn layer and (2) a single-layer one that models firn and underlying glacier ice as a single layer. The model was applied at the site of Colle Gnifetti (Monte Rosa massif, 4400–4550 ma.s.l.). We obtained an average reduction in annual snow accumulation due to wind erosion of 2×103 kgm-2yr-1 to be compared with a mean annual precipitation of about 2.7×103 kgm-2yr-1. The conserved accumulation is made up mainly of snow deposited between April and September, when temperatures above the melting point are also observed. End-of-year snow density, instead, increased an average of 65 kg m−3 when the contribution of wind to snow compaction was added. Observations show a high spatial and interannual variability in the characteristics of snow and firn at the site and a correlation of net balance with radiation and the number of melt layers. The computation of snowmelt in the model as a sole function of air temperature may therefore be one of the reasons for the observed mismatch between model and observations. |
format |
Article in Journal/Newspaper |
author |
Banfi, Fabiola De Michele, Carlo |
author_facet |
Banfi, Fabiola De Michele, Carlo |
author_sort |
Banfi, Fabiola |
title |
A local model of snow–firn dynamics and application to the Colle Gnifetti site |
title_short |
A local model of snow–firn dynamics and application to the Colle Gnifetti site |
title_full |
A local model of snow–firn dynamics and application to the Colle Gnifetti site |
title_fullStr |
A local model of snow–firn dynamics and application to the Colle Gnifetti site |
title_full_unstemmed |
A local model of snow–firn dynamics and application to the Colle Gnifetti site |
title_sort |
local model of snow–firn dynamics and application to the colle gnifetti site |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-1031-2022 https://noa.gwlb.de/receive/cop_mods_00060375 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060015/tc-16-1031-2022.pdf https://tc.copernicus.org/articles/16/1031/2022/tc-16-1031-2022.pdf |
long_lat |
ENVELOPE(162.850,162.850,-70.917,-70.917) |
geographic |
Monte Rosa |
geographic_facet |
Monte Rosa |
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-16-1031-2022 https://noa.gwlb.de/receive/cop_mods_00060375 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060015/tc-16-1031-2022.pdf https://tc.copernicus.org/articles/16/1031/2022/tc-16-1031-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-1031-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
3 |
container_start_page |
1031 |
op_container_end_page |
1056 |
_version_ |
1766216727556784128 |