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Permafrost table temperature and active layer thickness variability on James Ross Island, Antarctic Peninsula, in 2004–2021 by Lucia Kaplan Pastíriková; Filip Hrbáček; Tomáš Uxa; Kamil Láska is a Environmental Science article available to read on EtoBox.

What is Permafrost table temperature and active layer thickness variability on James Ross Island, Antarctic Peninsula, in 2004–2021 about?

Climate change and its impacts on sensitive polar ecosystems are relatively little studied in Antarctic regions. Permafrost and active layer changes over time in periglacial regions of the world are important indicators of climate variability. These changes (e. g. permafrost degradation, increasing of the active layer thickness) can have a significant impact on Antarctic terrestrial ecosystems. The study site (AWS-JGM) is located on the Ulu Peninsula in the north of James Ross Island. Ground temperatures at depths of 5, 50, and 75 cm have been measured at the site since 2011, while air temperature began to be measured in 2004. The main objective is to evaluate the year-to-year variability of the reconstructed temperature of the top of the permafrost table and the active layer thickness (ALT) since 2004 based on air temperature data using TTOP and Stefan models, respectively. The models were verified against direct observations from a reference period 2011/12–2020/21 showing a strong correlation of 0.95 (RMSE = 0.52) and 0.84 (RMSE = 3.54) for TTOP and Stefan models, respectively. The reconstructed average temperature of the permafrost table for the period 2004/05–2020/21 was −5.8 °

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Author

Lucia Kaplan Pastíriková; Filip Hrbáček; Tomáš Uxa; Kamil Láska

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)