DC pole | Wartość | Język |
dc.contributor.author | Uszczyk, Aleksander | - |
dc.contributor.author | Grabiec, Mariusz | - |
dc.contributor.author | Laska, Michał | - |
dc.contributor.author | Kuhn, Michael | - |
dc.contributor.author | Ignatiuk, Dariusz | - |
dc.date.accessioned | 2020-01-23T17:50:36Z | - |
dc.date.available | 2020-01-23T17:50:36Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Polish Polar Research, Vol. 40, no. 4 (2019), s. 311–338 | pl_PL |
dc.identifier.issn | 2081-8262 | - |
dc.identifier.issn | 0138-0338 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/12202 | - |
dc.description.abstract | Snowmelt is a very important component of freshwater resources in the polar
environment. Seasonal fluctuations in the water supply to glacial drainage systems influence
glacier dynamics and indirectly affect water circulation and stratification in fjords.
Here, we present spatial distribution of the meltwater production from the snow cover
on Hansbreen in southern Spitsbergen. We estimated the volume of freshwater coming
from snow deposited over this glacier. As a case study, we used 2014 being one of
the warmest season in the 21st century. The depth of snow cover was measured using
a high frequency Ground Penetrating Radar close to the maximum stage of accumulation.
Simultaneously, a series of studies were conducted to analyse the structure of the
snowpack and its physical properties in three snow pits in different glacier elevation
zones. These data were combined to construct a snow density model for the entire
glacier, which together with snow depth distribution represents essential parameters to
estimate glacier winter mass balance. A temperature index model was used to calculate
snow ablation, applying an average temperature lapse rate and surface elevation changes.
Applying variable with altitude degree day factor, we estimated an average daily rate
of ablation between 0.023 m d-1 °C-1 (for the ablation zone) and 0.027 m d-1 °C-1
(in accumulation zone). This melting rate was further validated by direct ablation data at
reference sites on the glacier. An average daily water production by snowmelt in 2014
ablation season was 0.0065 m w.e. (water equivalent) and 41.52·106 m3 of freshwater
in total. This ablation concerned 85.5% of the total water accumulated during winter
in snow cover. Extreme daily melting exceeded 0.020 m w.e. in June and September
2014 with a maximum on 6th July 2014 (0.027 m w.e.). The snow cover has completely
disappeared at the end of ablation season on 75.8% of the surface of Hansbreen. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/pl/ | * |
dc.subject | Arctic | pl_PL |
dc.subject | Svalbard | pl_PL |
dc.subject | snowpack | pl_PL |
dc.subject | snow accumulation and ablation | pl_PL |
dc.subject | snow water equivalent | pl_PL |
dc.subject | temperature index model | pl_PL |
dc.title | Importance of snow as component of surface mass balance of Arctic glacier (Hansbreen, southern Spitsbergen) | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.24425/ppr.2019.130901 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
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