Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865
We have reconstructed the annual balance of the Vadret da Morteratsch, Engadine, with a two-dimensional energy-balance model for the period between 1865 and 2005. The model takes into account a parameterisation of the surface energy fluxes, an albedo that decreases exponentially with snow depth as w...
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ftawi:oai:epic.awi.de:19889 2024-09-15T17:39:58+00:00 Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 Nemec, J. Huybrechts, Philippe Rybak, Oleg Oerlemans, J. 2009 application/pdf https://epic.awi.de/id/eprint/19889/ https://epic.awi.de/id/eprint/19889/1/Nem2009a.pdf https://hdl.handle.net/10013/epic.31782 https://hdl.handle.net/10013/epic.31782.d001 unknown https://epic.awi.de/id/eprint/19889/1/Nem2009a.pdf https://hdl.handle.net/10013/epic.31782.d001 Nemec, J. , Huybrechts, P. , Rybak, O. and Oerlemans, J. (2009) Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 , Annals of Glaciology, 50 , pp. 126-134 . hdl:10013/epic.31782 EPIC3Annals of Glaciology, 50, pp. 126-134 Article peerRev 2009 ftawi 2024-06-24T04:01:09Z We have reconstructed the annual balance of the Vadret da Morteratsch, Engadine, with a two-dimensional energy-balance model for the period between 1865 and 2005. The model takes into account a parameterisation of the surface energy fluxes, an albedo that decreases exponentially with snow depth as well as the shading effect of the surrounding mountains. The model was first calibrated with a 5-year record of annual balance measurements made at 20 different sites on the glacier between 2001 and 2006 using meteorological data from surrounding weather stations as input. To force the model for the period starting in 1865 we employed monthly temperature and precipitation records from nearby valley stations. The model is capable to reproduce the observed annual balance reasonably well, except for the lower part during the warmest years. Most crucial to the results is the altitudinal precipitation gradient, but this factor is hard to quantify from the limited precipitation data at high elevations. The simulation shows an almost continuous mass loss since 1865, with short interruptions around 1920, 1935 and 1980. A trend towards a more negative annual balance can be observed since the beginning of the 1980s. The simulated cumulative mass balance for the entire period from 1865 to 2005 was found to be -46 m w.e. Article in Journal/Newspaper Annals of Glaciology Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We have reconstructed the annual balance of the Vadret da Morteratsch, Engadine, with a two-dimensional energy-balance model for the period between 1865 and 2005. The model takes into account a parameterisation of the surface energy fluxes, an albedo that decreases exponentially with snow depth as well as the shading effect of the surrounding mountains. The model was first calibrated with a 5-year record of annual balance measurements made at 20 different sites on the glacier between 2001 and 2006 using meteorological data from surrounding weather stations as input. To force the model for the period starting in 1865 we employed monthly temperature and precipitation records from nearby valley stations. The model is capable to reproduce the observed annual balance reasonably well, except for the lower part during the warmest years. Most crucial to the results is the altitudinal precipitation gradient, but this factor is hard to quantify from the limited precipitation data at high elevations. The simulation shows an almost continuous mass loss since 1865, with short interruptions around 1920, 1935 and 1980. A trend towards a more negative annual balance can be observed since the beginning of the 1980s. The simulated cumulative mass balance for the entire period from 1865 to 2005 was found to be -46 m w.e. |
format |
Article in Journal/Newspaper |
author |
Nemec, J. Huybrechts, Philippe Rybak, Oleg Oerlemans, J. |
spellingShingle |
Nemec, J. Huybrechts, Philippe Rybak, Oleg Oerlemans, J. Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 |
author_facet |
Nemec, J. Huybrechts, Philippe Rybak, Oleg Oerlemans, J. |
author_sort |
Nemec, J. |
title |
Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 |
title_short |
Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 |
title_full |
Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 |
title_fullStr |
Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 |
title_full_unstemmed |
Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 |
title_sort |
reconstruction of the annual balance of vadret da morteratsch, switzerland, since 1865 |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/19889/ https://epic.awi.de/id/eprint/19889/1/Nem2009a.pdf https://hdl.handle.net/10013/epic.31782 https://hdl.handle.net/10013/epic.31782.d001 |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
EPIC3Annals of Glaciology, 50, pp. 126-134 |
op_relation |
https://epic.awi.de/id/eprint/19889/1/Nem2009a.pdf https://hdl.handle.net/10013/epic.31782.d001 Nemec, J. , Huybrechts, P. , Rybak, O. and Oerlemans, J. (2009) Reconstruction of the annual balance of Vadret da Morteratsch, Switzerland, since 1865 , Annals of Glaciology, 50 , pp. 126-134 . hdl:10013/epic.31782 |
_version_ |
1810483695042166784 |