کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4685337 1635489 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Classification of sorted patterned ground areas based on their environmental characteristics (Skagafjörður, Northern Iceland)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Classification of sorted patterned ground areas based on their environmental characteristics (Skagafjörður, Northern Iceland)
چکیده انگلیسی

A multivariate statistical method (factor analysis of mixed data and hierarchical classification) was used to classify the environmental settings where sorted patterned ground develops in a wet oceanic periglacial area (Skagafjörður, Northern Iceland). A total of 750 periglacial features, distributed over 75 sites, were studied. Nine explanatory variables were assessed by fieldwork and using a digital elevation model, the variables were subdivided into three groups (latitude, topography and soil characteristics) and then integrated into a geographical information system. Furthermore, a correlation between the environmental variables and an intrinsic variable (patterned ground mesh diameter) was determined by a bivariate test. The results show that sorted patterned ground are spread over three homogenous areas, mostly differentiated by altitude, insolation, grain size characteristics and type of drift. In addition, feature diameters differ significantly from one group to another. Finally, it appears that patterned ground diameters are positively correlated with (i) the proportion of clay to medium silt content (r = 0.35), (ii) altitude (r = 0.51), and especially with (iii) clast length (r = 0.97). This strong relationship with clast length is observed in each homogenous patterned ground area at both site and feature scales.


► We studied sorted patterned ground in Northern Iceland.
► Sorted patterned ground areas were classified using a factor analysis of mixed data.
► The results reveal that periglacial features are spread over three homogeneous areas.
► Elevation and type of drift are the most discriminant environmental variables.
► We also showed that feature diameter is strongly correlated with clast length.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volumes 139–140, 15 February 2012, Pages 577–587
نویسندگان
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