Cliff retreat of permafrost coast in the southwest Baydaratskaya Bay of Kara Sea during 2005–2016

Isaev, V.S.; Koshurnikov, A.V.; Pogorelov, A.A.; Amangurov, R.M.; Podchasov, O.V.; Buldovich, S.N.; Aleksyutina, D.; Grishakina, E.A.; Kioka, A.

Авторы: Isaev V.S., Koshurnikov A.V., Pogorelov A.A., Amangurov R.M., Podchasov O.V., Buldovich S.N., Aleksyutina D., Grishakina E.A., Kioka A.
Журнал: Permafrost and Periglacial Processes
Номер: 30
Год издания: 2019
Издательство: John Wiley & Sons Inc.
Местоположение издательства: United States
Первая страница: 35
Последняя страница: 47
DOI: 10.1002/ppp.1993
Аннотация: Recent years of increasing air temperature in the Arctic have known to lead a significant increase in the retreat speed of permafrost coast, which has threatened livelihoods and infrastructure along the coasts.The Kara Sea hosts more than 25% of the total length of Arctic coasts. Yet, little is known about how coastal erosion in the Kara Sea may have changed through time and what the climatic and environmental drivers are. We study coastal dynamics along a 4 km stretch of permafrost and sea-ice affected coastline in the southwest Baydaratskaya Bay of Kara Sea, Western Siberia, between 2005 and 2016, by handheld differential GPS mapping and satellite imagery. We find temporal and spatial variations in the retreat rates, ranging between 1.0 (+0.1/–0.6) m/yr and 1.9 (+0.7/–1.3) m/yr over the studied coastline during 2005–2016. We also perform ground temperature measurements, subsurface resistivity measurements, and estimation of wave energy flux of wind-driven ocean wave, to investigate the dominant climatic factors influencing the observed retreat rates through time. The results reveal that the wind-driven wave activity during the sea ice-free days influences the magnitude of coastal retreat in the study area, while that recent temperature rise less contributes to enhancing coastal retreat during the study period. This suggests that quantities of the eroded sediment and the associated release of nutrient to the nearshore zone are controlled by the magnitude of wave activity, which might result in influencing infrastructure along the permafrost coast and marine ecosystem in the proximal ocean.
Добавил в систему: Исаев Владислав Сергеевич

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Cliff retreat of permafrost coast in the southwest Baydaratskaya Bay of Kara Sea during 2005–2016статья

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