Ice and Snow

Лед и снег

2076-67342412-3765

The Russian Academy of Sciences

659380

10.31857/S2076673423020138

RVESBM

Glaciers and ice sheets

Ледники и ледниковые покровы

Intra-Annual Variability of the Surface Ablation of the Aldegondabreen Glacier (Spitsbergen)

Внутрисезонная изменчивость абляции ледника Альдегонда (Шпицберген)

Prokhorova

U. V.

Прохорова

У. В.

uvprokhorova@aari.ru

Terekhov

A. V.

Терехов

А. В.

uvprokhorova@aari.ru

Demidov

V. E.

Демидов

В. Э.

uvprokhorova@aari.ru

Ivanov

B. V.

Веркулич

С. Р.

uvprokhorova@aari.ru

Verkulich

S. R.

Иванов

Б. В.

uvprokhorova@aari.ru

Arctic and Antarctic Research InstituteАрктический и Антарктический научно-исследовательский институт

Saint Petersburg State UniversityАрктический и Антарктический научно-исследовательский институт

Arctic and Antarctic Research InstituteСанкт-Петербургский государственный университет

01042023

63221422420022025

2023

У.В. Прохорова, А.В. Терехов, В.Э. Демидов, С.Р. Веркулич, Б.В. Иванов

http://creativecommons.org/licenses/by/4.0

https://journals.eco-vector.com/2076-6734/article/view/659380

The intra-annual variability of the surface ice ablation on the 5.5 km² Aldegondabreen glacier (Spitsbergen Island, Barentsburg area) is presented. The ice ablation was measured during five seasons (2018–2022) at the two stakes, installed in the lower part of the glacier and at the index site, where the amount of ablation numerically coincides with the glacier-averaged value with the r = 0.99 agreement. The temporal resolution of the ice ablation data is uneven and varies from 3 to 45 days. To carry out the correlation analysis, meteorological data from the automated weather station located near the glacier terminus are used. The ice ablation rates, obtained after normalization for the number of days between stake readings, have a tight correlation with both the air temperature and the downwelling shortwave radiation flux for most of the seasons, in 2018–2021 (r = 0.71–0.99). Surface air temperature and short-wave radiation are closely related; the above estimates indicate the leading role of short-wave radiation in the summer ablation of the glacier in the period 2018–2021. The year 2022 became anomalous, as the correlation with the shortwave radiation significantly decreased (r = 0.21–0.34). The European heat wave of 2022, which also affected the Svalbard archipelago, interrupted the ordinary intra-annual variability of the air temperature, causing the unprecedented ice melt on Aldegondabreen in September. The predicted increase in frequency and intensity of the future heat waves will result in an increased role of turbulent fluxes in the surface energy balance of the low-elevated Svalbard glaciers. The article demonstrates how the empirically identified dependencies can change from season to season in a non-stationary climate.

Рассмотрена зависимость внутрисезонной изменчивости абляции льда на леднике Альдегонда (Шпицберген) от приземной температуры воздуха и потока коротковолновой радиации. В 2018–2021 гг. абляция льда хорошо согласуется с обоими факторами (r = 0.80–0.98 и 0.71–0.99 соответственно). 2022 год – аномальный с точки зрения нарушения связей абляции и радиации, что объясняется продолжительной волной тепла в Европе.

ArcticSvalbardglacier mass balanceshort-wave radiationheat wave

АрктикаШпицбергенбаланс массы ледникакоротковолновая радиацияволна тепла

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