Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach
Abstract Identification of the environmental drivers of geomorphological processes in cold regions is a central topic in periglacial research. The objective of this study was to develop and test a methodology to: (1) predict the occurrence of palsas, earth hummocks, sorted solifluction sheets and pe...
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crwiley:10.1002/ppp.584 2024-06-02T08:12:02+00:00 Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach Hjort, Jan Luoto, Miska Seppälä, Matti 2007 http://dx.doi.org/10.1002/ppp.584 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.584 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.584 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 18, issue 2, page 115-127 ISSN 1045-6740 1099-1530 journal-article 2007 crwiley https://doi.org/10.1002/ppp.584 2024-05-03T11:28:47Z Abstract Identification of the environmental drivers of geomorphological processes in cold regions is a central topic in periglacial research. The objective of this study was to develop and test a methodology to: (1) predict the occurrence of palsas, earth hummocks, sorted solifluction sheets and periglacial deflation sites in a subarctic landscape and (2) determine the most important environmental factors affecting the distribution of these features at the landscape scale. The study was performed using an empirically‐derived data‐set of landforms from an area of 600 km 2 in northern Finland at a 25 ha resolution (n = 2272). Logistic regression and hierarchical partitioning were used to analyse the data and the predictive performance of the models was evaluated using area under the curve (AUC) measures. The explanatory variables highlighted as important predictors of the occurrence of periglacial features coincided well with the hypothesised determinants. Predictions for palsa, earth hummock and sorted solifluction sheet models were excellent (AUC = 0.92–0.95) and the deflation site model was good (AUC = 0.81). The results encourage further application of the grid‐based modelling approach, for example in predicting feature occurrences in other periglacial regions, studying scale dependency of process‐environment interactions and determining the effect of climate change on the distribution of frost‐related processes. Copyright © 2007 John Wiley & Sons, Ltd. Article in Journal/Newspaper Northern Finland palsa palsas Permafrost and Periglacial Processes Subarctic Wiley Online Library Permafrost and Periglacial Processes 18 2 115 127 |
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English |
description |
Abstract Identification of the environmental drivers of geomorphological processes in cold regions is a central topic in periglacial research. The objective of this study was to develop and test a methodology to: (1) predict the occurrence of palsas, earth hummocks, sorted solifluction sheets and periglacial deflation sites in a subarctic landscape and (2) determine the most important environmental factors affecting the distribution of these features at the landscape scale. The study was performed using an empirically‐derived data‐set of landforms from an area of 600 km 2 in northern Finland at a 25 ha resolution (n = 2272). Logistic regression and hierarchical partitioning were used to analyse the data and the predictive performance of the models was evaluated using area under the curve (AUC) measures. The explanatory variables highlighted as important predictors of the occurrence of periglacial features coincided well with the hypothesised determinants. Predictions for palsa, earth hummock and sorted solifluction sheet models were excellent (AUC = 0.92–0.95) and the deflation site model was good (AUC = 0.81). The results encourage further application of the grid‐based modelling approach, for example in predicting feature occurrences in other periglacial regions, studying scale dependency of process‐environment interactions and determining the effect of climate change on the distribution of frost‐related processes. Copyright © 2007 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Hjort, Jan Luoto, Miska Seppälä, Matti |
spellingShingle |
Hjort, Jan Luoto, Miska Seppälä, Matti Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach |
author_facet |
Hjort, Jan Luoto, Miska Seppälä, Matti |
author_sort |
Hjort, Jan |
title |
Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach |
title_short |
Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach |
title_full |
Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach |
title_fullStr |
Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach |
title_full_unstemmed |
Landscape scale determinants of periglacial features in subarctic Finland: a grid‐based modelling approach |
title_sort |
landscape scale determinants of periglacial features in subarctic finland: a grid‐based modelling approach |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/ppp.584 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.584 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.584 |
genre |
Northern Finland palsa palsas Permafrost and Periglacial Processes Subarctic |
genre_facet |
Northern Finland palsa palsas Permafrost and Periglacial Processes Subarctic |
op_source |
Permafrost and Periglacial Processes volume 18, issue 2, page 115-127 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.584 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
18 |
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2 |
container_start_page |
115 |
op_container_end_page |
127 |
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1800758343640285184 |