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  1. Home
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  11. Temporal Trend And Dynamics Of The Active Layer At Different Monitoring Points In Maritime Antarctica And Peninsula.
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  11. Temporal Trend And Dynamics Of The Active Layer At Different Monitoring Points In Maritime Antarctica And Peninsula.

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Temporal trend and dynamics of the active layer at different monitoring points in Maritime Antarctica and Peninsula.

Tamíres P Correia1, Gustavo V Veloso2, Gustavo B Lyra3

  • 1Instituto Federal do Sudeste de Minas Gerais, Rua Monsenhor José Augusto, 204, Campus Barbacena, São José, 36205-018 Barbacena, MG, Brazil.

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|November 19, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Antarctic permafrost monitoring reveals significant trends in soil temperature and active layer thickness. Local factors and global warming influence these changes, impacting the region

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Area of Science:

  • Earth Science
  • Climate Science
  • Permafrost Science

Background:

  • Antarctica offers a unique natural laboratory for studying permafrost dynamics and global climate change.
  • Four monitoring sites were established in maritime Antarctica and the Peninsula to assess environmental variables.
  • Understanding permafrost changes is crucial for predicting global climate shifts.

Purpose of the Study:

  • To analyze temporal trends in air and soil temperature at selected Antarctic sites.
  • To investigate the dynamics of the active soil layer (ALT) and its influencing factors.
  • To evaluate the impact of local and global climate factors on Antarctic permafrost.

Main Methods:

  • Statistical trend analysis using the Mann-Kendall test for time series data.
  • Sen-Slope test to quantify the magnitude of observed trends.
  • Pettitt test to identify abrupt changes in trend lines.
  • Estimation of active layer thickness (ALT) based on monthly maximum soil temperatures.

    • Main Results:

    • Significant temporal trends in temperature and ALT were detected across all monitored sites.
    • The active layer thickness (ALT) was greater near the Antarctic Peninsula compared to Shetland sites.
    • Geothermal activity significantly influenced the heat balance at Deception Island, particularly at depth.
    • Isotherms showed an increase with depth during summer and autumn at Low Head, Deception, and Hope Bay.

    Conclusions:

    • Local site-specific conditions significantly affect active layer dynamics and thermal regimes in Antarctica.
    • Observed permafrost changes are influenced by a combination of global warming, natural variability, and regional climate factors.
    • Increasing extreme weather events due to global warming exacerbate changes in Antarctic permafrost.