کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8908177 1635346 2018 34 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Climate change and water table fluctuation: Implications for raised bog surface variability
ترجمه فارسی عنوان
تغییرات آب و هوا و نوسانات آب آبیاری: پیامدهای تغییرات سطوح بالابرنده
کلمات کلیدی
تغییر آب و هوا، سطح کف زمین، میز آب باران افزایش یافته است متغیر سطح، باران خالص،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
Cyclic peatland surface variability is influenced by hydrological conditions that highly depend on climate and/or anthropogenic activities. A low water level leads to a decrease of peatland surface and an increase of C emissions into the atmosphere, whereas a high water level leads to an increase of peatland surface and carbon sequestration in peatlands. The main aim of this article is to evaluate the influence of hydrometeorological conditions toward the peatland surface and its feedback toward the water regime. A regional survey of the raised bog water table fluctuation and surface variability was made in one of the largest peatlands in Lithuania. Two appropriate indicators for different peatland surface variability periods (increase and decrease) were detected. The first one is an ~ 200 mm y− 1 average net rainfall over a three-year range. The second one is an average annual water depth of 25-30 cm. The application of these indicators enabled the reconstruction of Čepkeliai peatland surface variability during a 100 year period. Processes of peatland surface variability differ in time and in separate parts of peatland. Therefore, internal subbasins in peatland are formed. Subbasins involve autogenic processes that can later affect their internal hydrology, nutrient status, and vegetation succession. Internal hydrological conditions, surface fluctuation, and vegetation succession in peatland subbasins should be taken into account during evaluation of their state, nature management projects, and other peatland research works.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 304, 1 March 2018, Pages 40-49
نویسندگان
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