Université de Fribourg

Constraining hydrological model parameters using water isotopic compositions in a glacierized basin, Central Asia

He, Zhihua ; Unger-Shayesteh, Katy ; Vorogushyn, Sergiy ; Weise, Stephan M. ; Kalashnikov, Olga ; Gafurov, Abror ; Duethmann, Doris ; Barandun, Martina ; Merza, Bruno

In: Journal of Hydrology, 2019, vol. 571, p. 332–348

Water stable isotope signatures can provide valuable insights into the catchment internal runoff processes. However, the ability of the water isotope data to constrain the internal apportionments of runoff components in hydrological models for glacierized basins is not well understood. This study developed an approach to simultaneously model the water stable isotopic compositions and runoff...

Université de Fribourg

A novel approach to estimate glacier mass balance in the Tien Shan and Pamir based on transient snowline observations

Barandun, Martina ; Huss, Matthias (Dir.)

Thèse de doctorat : Université de Fribourg, 2018 ; no 2099.

Glaciers are recognised as an excellent proxy for climate change and their centennial massloss has accelerated during the past decades. The Central Asian mountain ranges Tien Shan and Pamir host over 25,000 glaciers that have been observed to respond heterogeneous to climate change. Glacier changes in the region have very important consequences on the water availability for the densely populated...

Université de Fribourg

Multi-decadal mass balance series of three Kyrgyz glaciers inferred from modelling constrained with repeated snow line observations

Barandun, Martina ; Huss, Matthias ; Usubaliev, Ryskul ; Azisov, Erlan ; Berthier, Etienne ; Kääb, Andreas ; Bolch, Tobias ; Hoelzle, Martin

In: The Cryosphere, 2018, vol. 12, no. 6, p. 1899–1919

Glacier surface mass balance observations in the Tien Shan and Pamir are relatively sparse and often discontinuous. Nevertheless, glaciers are one of the most important components of the high-mountain cryosphere in the region as they strongly influence water availability in the arid, continental and intensely populated downstream areas. This study provides reliable and continuous surface mass...

Université de Fribourg

Re-establishing glacier monitoring in Kyrgyzstan and Uzbekistan, Central Asia

Hoelzle, Martin ; Azisov, Erlan ; Barandun, Martina ; Huss, Matthias ; Farinotti, Daniel ; Gafurov, Abror ; Hagg, Wilfried ; Kenzhebaev, Ruslan ; Kronenberg, Marlene ; Machguth, Horst ; Merkushkin, Alexandr ; Moldobekov, Bolot ; Petrov, Maxim ; Saks, Tomas ; Salzmann, Nadine ; Schöne, Tilo ; Tarasov, Yuri ; Usubaliev, Ryskul ; Vorogushyn, Sergiy ; Yakovlev, Andrey ; Zemp, Michael

In: Geoscientific Instrumentation, Methods and Data Systems, 2017, vol. 6, no. 2, p. 397–418

Glacier mass loss is among the clearest indicators of atmospheric warming. The observation of these changes is one of the major objectives of the international climate monitoring strategy developed by the Global Climate Observing System (GCOS). Long-term glacier mass balance measurements are furthermore the basis for calibrating and validating models simulating future runoff of glacierised...

Université de Fribourg

Mass-balance reconstruction for Glacier No. 354, Tien Shan, from 2003 to 2014

Kronenberg, Marlene ; Barandun, Martina ; Hoelzle, Martin ; Huss, Matthias ; Farinotti, Daniel ; Azisov, Erlan ; Usubaliev, Ryskul ; Gafurov, Abror ; Petrakov, Dmitry ; Kääb, Andreas

In: Annals of Glaciology, 2016, vol. 57, no. 71, p. 92–102

This study presents a reconstruction of the seasonal mass balance of Glacier No. 354, located in the Akshiirak range, Kyrgyzstan, from 2003 to 2014. We use a distributed accumulation and temperature-index melt model driven by daily air temperature and precipitation from a nearby meteorological station. The model is calibrated with in situ measurements of the annual mass balance collected from...

Université de Fribourg

Re-analysis of seasonal mass balance at Abramov glacier 1968–2014

Barandun, Martina ; Huss, Matthias ; Sold, Leo ; Farinotti, Daniel ; Azisov, Erlan ; Salzmann, Nadine ; Usubaliev, Ryskul ; Merkushkin, Alexandr ; Hoelzle, Martin

In: Journal of Glaciology, 2015, vol. 61, no. 230, p. 1103–1117

Abramov glacier, located in the Pamir Alay, Kyrgyzstan, is a reference glacier within the Global Terrestrial Network for Glaciers. Long-term glaciological measurements exist from 1968 to 1998 and a mass-balance monitoring programme was re-established in 2011. In this study we re-analyse existing mass-balance data and use a spatially distributed mass-balance model to provide continuous seasonal...