A carregar...
Publicação
Shoreline change rates and land to sea sediment and soil organic carbon transfer in eastern Parry Peninsula from 1965 to 2020 (Amundsen Gulf, Canada)
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 4.35 MB | Adobe PDF |
Orientador(es)
Resumo(s)
As the Arctic is warming, permafrost coasts are eroding faster, threatening coastal communities, habitats, and altering
sediment and nutrient budgets. The western Canadian Arctic is eroding at a rapid pace; however, little is known on changes
occurring in the Amundsen Gulf area. This study was conducted in the eastern coast of Parry Peninsula, a neglected rockdominated coastal area. We used orthorectified aerial photos of 1965 and 1993 and very high-resolution satellite imagery
of 2020 to manually delineate the shoreline according to backshore and foreshore centered approaches. Shoreline change
rates were calculated and sediment and organic carbon transfer from land to sea estimated using digital elevation model,
the Northern Circumpolar Soil Carbon Database, and ground ice content. The results show a mean erosion rate of 0.12 m/yr
for the backshore zone and 0.16 m/yr for the foreshore zone, with increasing erosion in the Paulatuk Peninsula in recent
decades. The average sediment transfer from land to sea was 20 m3/m/yr and the soil organic carbon (SOC) flux was 7 kg
C/m/yr. We highlight the importance of using the cliff-top as shoreline reference to accurately estimate sediment and SOC
transfers, an approach neglected in automatic shoreline delineation techniques based on remote sensing imagery using the
waterline.
Descrição
Palavras-chave
Coastal dynamics Permafrost Darnley Bay Carbon fluxes Remote sensing
Contexto Educativo
Citação
Tanguy, R., Whalen,D., Prates, G., & Vieira, G. (2023). Shoreline change rates and land to sea sediment and soil organic carbon transfer in eastern Parry Peninsula from 1965 to 2020 (Amundsen Gulf, Canada). Arctic Science, 9(3), 506-525. https://doi.org/10.1139/as-2022-0028
Editora
Canadian Science Publishing