Formation of new periglacial lakes in the Grønfjord basin (Svalbard) in 1938–2010

Based on remote sensing and field methods, the state of the glacial lakes located in the Grønfjord Bay basin, Svalbard, was assessed for 2008–2010. New lakes were formed due to the retreat of the mountain-valley glaciers of the Nordenskiöld Land and the formation of moraine-ridge topography. Accordi...

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Bibliographic Details
Main Authors: K. Romashova V., R. Chernov A., К. Ромашова В., Р. Чернов А.
Other Authors: The development of the methodology and data analysis were carried out within the framework of the Institute of Geography of the Russian Academy of Sciences state task AAAA-A19-119022190172-5 (FMGE-2019-0004) «Glaciation and related natural processes under climate change»., Разработка методики и анализ данных выполнены в рамках темы Государственного задания Института географии РАН АААА-А19-119022190172-5 (FMGE-2019-0004) «Оледенение и сопутствующие природные процессы при изменениях климата».
Format: Article in Journal/Newspaper
Language:Russian
Published: IGRAS 2022
Subjects:
Online Access:https://ice-snow.igras.ru/jour/article/view/979
https://doi.org/10.31857/S2076673422020125
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Summary:Based on remote sensing and field methods, the state of the glacial lakes located in the Grønfjord Bay basin, Svalbard, was assessed for 2008–2010. New lakes were formed due to the retreat of the mountain-valley glaciers of the Nordenskiöld Land and the formation of moraine-ridge topography. According to the 2008–2010 aerial survey data, 111 glacial lakes were identified in the basin area. Most of the new lakes were formed on the moraines of the large mountain-valley glaciers Vestre and Austre Grønfjordbreen, Brydebreen, Skavlefjellbreen, and Tungebreen. The total area of the glacial lakes is 2.047±0.001 km², 84% of their total area belongs to the two largest lakes Bretjørna and Stemmevatnet. The rest of the lakes in the territory are small, from 20 to 330 m in length, and shallow. The estimation of the volume of water in the lakes was based on field measurements of the depths of 26 lakes and the correlation found. The total volume of water is 24.1 million m³, which is comparable with the value of annual glacial runoff in the basin. С помощью картографического сервиса Норвежского полярного института (toposvalbard) получены данные об озёрах в бассейне залива Грёнфьорд. Всего на водосборе на 2008–2010 гг. обнаружено 134 озера, среди них 111 – новые приледниковые озёра, которые образовались в связи с сокращением ледников с начала ХХ в. Подавляющее большинство приледниковых озёр появилось на территории морен крупных горно-долинных ледников – Западный и Восточный Грёнфьорд, Тунге и Скавле. Оценены суммарная площадь, объём озёр на водосборе и плотность распределения приледниковых озёр на площади морен. С 1938 до 2010 г. суммарная площадь всех озёр увеличилась в 4 раза.