Periglacial distribution modelling with a boosting method

• Published in: Permafrost and Periglacial Processes
• Main Authors: Jan Hjort, Mathieu Marmion
• Format: Article in Journal/Newspaper
• Language: unknown
• Subjects: Arctic; permafrost
• Online Access: https://doi.org/10.1002/ppp.629

We assessed the applicability of a boosting method in periglacial distribution modelling using empirically derived data on cryoturbation, sporadic permafrost and sorted solifluction from an area of 600 km2 in sub‐Arctic Finland. The main aims were: (1) to compare the predictive ability of the generalised boosting method used with more common parametric techniques (generalised linear model) and machine‐learning methods (artificial neural networks) and (2) to assess the tenability of the explanatory variables highlighted by the generalised boosting method. The results showed the robustness of the boosting method in predicting the distribution of periglacial phenomena in the sub‐Arctic landscape. Furthermore, the environmental factors selected by the boosting method coincided well with the expected controls of the phenomena. The strengths of the generalised boosting method lie in its high predictive ability, flexibility in capturing complex process‐environment relationships and realistic model outcomes. Copyright © 2008 John Wiley & Sons, Ltd.