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Alpine-wide distributed glacier mass balance modelling for assessment of precipitation in high-mountain regions with application to palaeoclimate reconstruction

Titel Englisch Alpine-wide distributed glacier mass balance modelling for assessment of precipitation in high-mountain regions with application to palaeoclimate reconstruction
Gesuchsteller/in Haeberli Wilfried
Nummer 117761
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Geographisches Institut Universität Zürich
Hochschule Universität Zürich – ZH
Hauptdisziplin Hydrologie, Limnologie, Glaziologie
Beginn/Ende 01.10.2007 - 30.09.2008
Bewilligter Betrag 45'225.00
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Keywords (10)

glacier mass balance modelling; high-mountain precipitation; palaeoclimate reconstruction; mass balance; modelling; uncertainty; precipitation; high-mountains; Alps; distributed

Lay Summary (Englisch)

Lead
Lay summary
The goal of this project is to apply distributed glacier mass balance models for the assessment of precipitation in high-mountain regions. Measurement of high-mountain precipitation is connected with large uncertainties and consequently often used for tuning in mass balance modeling. If the spatial distribution of the other input parameters can be determined with sufficient accuracy, an iterative adjustment of precipitation for a large number of glaciers will be performed for an assessment of the precipitation at the glacier location.

In the previous three years of this project a number of important milestones have already been reached:
(a) Winter and summer balance was measured on the adjacent glaciers Findel and Adler near Zermatt. (b) A pilot study on accumulation distribution on Findel and Adler Glacier has been conducted where the proposed applicability of glacier mass balance models for precipitation assessment was tested. It could be shown, that accumulation on Adler Glacier is strongly reduced compared to Findel Glacier, confirming the deviation in accumulation that was calculated beforehand with a distributed mass balance model. (c) A toolbox of four mass balance models of differing levels of complexity has been programmed. (d) Models out of the toolbox have been applied with respect to data of glacier fluctuations and precipitation assessment.

Within the next twelve-months of this project three major steps will be performed, or finalized, respectively:
(1) Preparation of input data sets: Data sets of the major input parameters will be prepared in cooperation with climatologists. Coupling of data with coarse spatial resolution (about 20 km) from climate models with high-resolution data from digital elevation models (about 50 m) will be further improved.
(2) Calculation of the model uncertainties: Model uncertainties resulting from the errors of the input data (exept of precipitation) will be determined using Monte Carlo simulations. This enables a better quality assessment of the final results.
(3) Calculation of the precipitation distribution for the glacierized part of the Swiss Alps: Driven by the above mentioned climate data sets, the models will be applied to assess deviations for given high-resolution precipitation maps on an Alpine-wide scale.
Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

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105214 Alpine-wide distributed glacier mass balance modelling for assessment of climate change effects and precipitation in high-mountain regions with application to palaeoclimate reconstruction 01.10.2004 Projektförderung (Abt. I-III)
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