دورية أكاديمية
Circumarctic land cover diversity considering wetness gradients
| العنوان: | Circumarctic land cover diversity considering wetness gradients |
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| المؤلفون: | A. Bartsch, A. Efimova, B. Widhalm, X. Muri, C. von Baeckmann, H. Bergstedt, K. Ermokhina, G. Hugelius, B. Heim, M. Leibman |
| المصدر: | Hydrology and Earth System Sciences, Vol 28, Pp 2421-2481 (2024) |
| بيانات النشر: | Copernicus Publications, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Technology LCC:Environmental technology. Sanitary engineering LCC:Geography. Anthropology. Recreation LCC:Environmental sciences |
| مصطلحات موضوعية: | Technology, Environmental technology. Sanitary engineering, TD1-1066, Geography. Anthropology. Recreation, Environmental sciences, GE1-350 |
| الوصف: | Land cover heterogeneity information considering soil wetness across the entire Arctic tundra is of interest for a wide range of applications targeting climate change impacts and ecological research questions. Patterns are potentially linked to permafrost degradation and affect carbon fluxes. First, a land cover unit retrieval scheme which provides unprecedented detail by fusion of satellite data using Sentinel-1 (synthetic aperture radar) and Sentinel-2 (multispectral) was adapted. Patterns of lakes, wetlands, general soil moisture conditions and vegetation physiognomy are interpreted at 10 m nominal resolution. Units with similar patterns were identified with a k-means approach and documented through statistics derived from comprehensive in situ records for soils and vegetation (more than 3500 samples). The result goes beyond the capability of existing land cover maps which have deficiencies in spatial resolution, thematic content and accuracy, although landscape heterogeneity related to moisture gradients cannot be fully resolved at 10 m. Wetness gradients were assessed, and measures for landscape heterogeneity were derived north of the treeline. About 40 % of the area north of the treeline falls into three units of dry types with limited shrub growth. Wetter regions have higher land cover diversity than drier regions. An area of 66 % of the analysed Arctic landscape is highly heterogeneous with respect to wetness at a 1 km scale (representative scale of frequently used regional land cover and permafrost modelling products). Wetland areas cover 9 % and moist tundra types 32 %, which is of relevance for methane flux upscaling. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2421-2024 1027-5606 1607-7938 |
| Relation: | https://hess.copernicus.org/articles/28/2421/2024/hess-28-2421-2024.pdf; https://doaj.org/toc/1027-5606; https://doaj.org/toc/1607-7938 |
| DOI: | 10.5194/hess-28-2421-2024 |
| URL الوصول: | https://doaj.org/article/245f08f502394a3294abdc587cf489a8 |
| رقم الأكسشن: | edsdoj.245f08f502394a3294abdc587cf489a8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 24212024 10275606 16077938 |
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| DOI: | 10.5194/hess-28-2421-2024 |