Dynamics of equilibrium line altitude in glaciers of the Monte Rosa massif in the Alps derived from Sentinel-2 satellite images

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10491586" target="_blank" >RIV/00216208:11310/24:10491586 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9j0XcHhziB" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9j0XcHhziB</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14712/23361980.2024.17" target="_blank" >10.14712/23361980.2024.17</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamics of equilibrium line altitude in glaciers of the Monte Rosa massif in the Alps derived from Sentinel-2 satellite images

Popis výsledku v původním jazyce

The equilibrium line altitude (ELA) is an immediate indicator of the mass balance of glaciers. The evolution of the ELA of four major glaciers in the Monte Rosa (European Alps) massif was investigated in this study. We used Sentinel-2 satellite images to derive the end-of-summer snowline altitude (SLA) as an approximation of ELA considering the fluctuations in the snowline at the end of the ablation season (from August to mid-October in 2016-2023). SLA was estimated as a percentile of the histogram of the DEM of each glacier with the applied snow-mask, based on the normalised difference snow index (NDSI). ELA was determined as the maximum snowline elevation reached in the season. We found the mean ELA for the studied period as 3560, 3230, 3430 and 3570 m above the sea level for Gornergletscher, Belvedere Glacier, Grenzgletscher, and Lys Glacier respectively. These differences are likely due to the variation in slope orientation and amount of snow accumulation. An increase in ELA was found for all the glaciers in the studied period amounting to 22.7, 8.3, 33.1 and 27.0 m/y respectively. The pattern of temporal behaviour was similar for all the glaciers, although we expected a different behaviour of the Belvedere Glacier, which is characterized by various local effects, such as frequent avalanching and rough topography.

Název v anglickém jazyce

Dynamics of equilibrium line altitude in glaciers of the Monte Rosa massif in the Alps derived from Sentinel-2 satellite images

Popis výsledku anglicky

The equilibrium line altitude (ELA) is an immediate indicator of the mass balance of glaciers. The evolution of the ELA of four major glaciers in the Monte Rosa (European Alps) massif was investigated in this study. We used Sentinel-2 satellite images to derive the end-of-summer snowline altitude (SLA) as an approximation of ELA considering the fluctuations in the snowline at the end of the ablation season (from August to mid-October in 2016-2023). SLA was estimated as a percentile of the histogram of the DEM of each glacier with the applied snow-mask, based on the normalised difference snow index (NDSI). ELA was determined as the maximum snowline elevation reached in the season. We found the mean ELA for the studied period as 3560, 3230, 3430 and 3570 m above the sea level for Gornergletscher, Belvedere Glacier, Grenzgletscher, and Lys Glacier respectively. These differences are likely due to the variation in slope orientation and amount of snow accumulation. An increase in ELA was found for all the glaciers in the studied period amounting to 22.7, 8.3, 33.1 and 27.0 m/y respectively. The pattern of temporal behaviour was similar for all the glaciers, although we expected a different behaviour of the Belvedere Glacier, which is characterized by various local effects, such as frequent avalanching and rough topography.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Universitatis Carolinae. Geographica

ISSN

0300-5402

e-ISSN

2336-1980

Svazek periodika

59

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

11

Strana od-do

229-239

Kód UT WoS článku

001389003400004

EID výsledku v databázi Scopus

2-s2.0-85213338193