glacier; monitoring; modelling; remote sensing; snow line; Central Asia
Barandun Martina, Huss Matthias, Usubaliev Ryskul, Azisov Erlan, Berthier Etienne, Kääb Andreas, Bolch Tobias, Hoelzle Martin (2018), Multi-decadal mass balance series of three Kyrgyz glaciers inferred from modelling constrained with repeated snow line observations, in The Cryosphere
, 12(6), 1899-1919.
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 (2017), Re-establishing glacier monitoring in Kyrgyzstan and Uzbekistan, Central Asia, in Geoscientific Instrumentation, Methods and Data Systems
, 6(2), 397-418.
Kenzhebaev Ruslan, Barandun Martina, Kronenberg Marlene, Chen Yaning, Usubaliev Ryskul, Hoelzle Martin (2017), Mass balance observations and reconstruction for Batysh Sook Glacier, Tien Shan, from 2004 to 2016, in Cold Regions Science and Technology
, 135, 76-89.
Kronenberg Marlene, Barandun Martina, Hoelzle Martin, Huss Matthias, Farinotti Daniel, Azisov Erlan, Usubaliev Ryskul, Gafurov Abror, Petrakov Dmitry, Kääb Andreas (2016), Mass-balance reconstruction for Glacier No. 354, Tien Shan, from 2003 to 2014, in Annals of Glaciology
, 57(71), 92-102.
Barandun Martina, Huss Matthias, Sold Leo, Farinotti Daniel, Azisov Erlan, Salzmann Nadine, Usubaliev Ryskul, Merkushkin Alexandr, Hoelzle Martin (2015), Re-analysis of seasonal mass balance at Abramov glacier 1968–2014, in Journal of Glaciology
, 61(230), 1103-1117.
The monitoring of glacier mass balance in remote regions is challenging but vital for understanding the response of glaciers to climate change. Glacier mass balance observations are sparse and inhomogeneously distributed, in particular for the target regions of the proposed project: the Tien Shan and the Pamir. In these regions glacier ice represents an important source of runoff, but glacier monitoring has only recently been re-established for selected glaciers. The under-sampling problem of glacier change assessments limits change predictions and impact projections. In this study, we plan to elaborate novel approaches to derive sub-seasonal glacier mass balance at a regional scale based on remote snowline monitoring. The proposed methodology is predicated on the information content of short-term changes in snowline elevation detected with repeated remote sensing imagery for both the quantities of winter accumulation and summer ablation. A relation between the observed snowline position, the glacier geometry and the glacier-wide mass balance is created by backward modelling. We will first apply and validate the methodology for Central Asian glaciers using terrestrial photography and mass balance measurements on three to four carefully selected study sites, and then incorporate snow depletion observations throughout the summer season provided by satellite images at the regional scale. Finally, satellite images of a larger part of the Tien Shan and Pamir mountain ranges will be compiled for the period 2000 to present and the validated approach will be used to evaluate the seasonal to sub-seasonal mass balance for several dozens of selected glaciers. We intend to combine these remote mass balance estimates with measurements of regional ice volume changes derived from repeat digital elevation models. In combination, this will provide glacier mass changes at high temporal and spatial resolution for a region about which so far only little is known about. The sub-seasonal mass balance calculations will provide an important input for runoff models allowing more accurate estimation of future water availability for Central Asian countries.