Circum-Arctic Permafrost Ground Temperature and Active Layer Thickness Forecasts

Statistical ensemble modeling forecasts current and future circum-Arctic Mean Annual Ground Temperature (MAGT) and Active Layer Thickness (ALT). The MAGT forecasts indicate permafrost currently prevails over an area of 15.1 ± 2.8 million square kilometers. The models were developed by Juha Aalto and published in 2020, showing region-specific changes in ground thermal regime due to climate change.

Use Cases

• Analyze the spatial distribution of MAGT forecasts to map current permafrost extent of 15.1 ± 2.8 million sq km.
• Model future ALT changes in relation to climatic factors to assess biogeochemical feedbacks.
• Validate statistical ensemble techniques using distance-blocked cross-validation between MAGT/ALT observations and predictions.
• Assess region-specific changes in ground thermal regime by comparing MAGT forecasts under different climate scenarios.

Strengths

• Forecasts cover the entire circum-Arctic region at spatial scales unreachable with contemporary transient modeling.
• Model transferability was validated, with distance-blocked cross-validation suggesting excellent transferability for MAGT.
• Provides a specific, quantified estimate of current permafrost extent (15.1 ± 2.8 million sq km).

Limitations

• Data is based on statistical modeling forecasts, not direct observational measurements, introducing model uncertainty.
• The dataset's last update was in 2020, so it may not reflect the most recent climate projections or observations.
• Specific row counts, column structures, and file formats are unknown, limiting immediate usability for some analyses.

Provenance

Source

Dryad digital repository.

Collection Method

Statistical ensemble modeling of MAGT and ALT in relation to climatic and local environmental factors.

Time Range

Forecasts for current and future periods under climate change.

Freshness

Last updated 2020-06-30.

Geography

Circum-Arctic region.