کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6412665 1629932 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Screening long-term variability and change of soil moisture in a changing climate
ترجمه فارسی عنوان
غربالگری تغییرات درازمدت و تغییر رطوبت خاک در شرایط تغییر آب و هوا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- Quantification framework for long-term soil moisture change in a changing climate.
- Variable unsaturated-groundwater zone extents.
- Historic and projected future soil moisture change can be screened.
- Increased frequency of dry soil moisture events over the 20th century.
- Drought risk increase even though precipitation increases.

SummarySoil moisture is an essential component of water variability and change in the landscape. This paper develops a conceptual and analytical framework for linking hydro-climatic change at the surface and soil-groundwater conditions in the subsurface, and quantifying long-term development of soil moisture statistics in a changing climate. Soil moisture is evaluated both in the unsaturated zone and over a fixed soil depth that may also include a variable groundwater table. Long-term variability and change of soil moisture are assessed for a hydro-climatic observation record that extends over the whole 20th century in a major Swedish drainage basin. Frequencies of particularly dry and wet soil moisture events are investigated for different 20-year climatic periods. Results show major increase in the frequency of dry events from the beginning to the end of the 20th century. This indicates increased risk for hydrological and agricultural drought even though the risk for meteorological drought, in terms of precipitation, has decreased in the region. The developed quantification framework can also be used to screen future scenarios of soil moisture change under projected climate change.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 516, 4 August 2014, Pages 131-139
نویسندگان
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