کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9491601 | 1630191 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Predicting the future DOC flux from upland peat catchments
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
This study reconstructs a long-term record of dissolved organic carbon (DOC) flux release from an upland peat catchment in Northern England in order to construct a model of future DOC flux. A structural modelling approach is used to develop models for DOC production in the acrotelm in relation to changing temperature and water table depth. DOC production in the acrotelm is coupled with a description of release of reserves of carbon from the catotelm triggered by enzymic latch mechanisms. The model needs only three parameters to be successfully matched to the data, with Nash-Sutcliffe efficiencies of over 90% against the reconstructed catchment record. Model results suggests that the half-life of the effect of drought on the catchment is 11.2 years and that the majority of DOC production comes from the acrotelm/catotelm boundary. Using the calibrated model and predictions of future rainfall and temperature, it is forecast that DOC flux from this peat-covered catchment will increase to 25Â tonnes C/km2 by 2010 at a rate of 0.48-0.88Â tonnes C/km2/year. These results imply a total DOC flux from UK rivers of 0.88-0.83Â Mt C in 2002 and of the order of 1Â Mt C by 2010. The implications for terrestrial carbon storage and water treatment are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 300, Issues 1â4, 10 January 2005, Pages 126-139
Journal: Journal of Hydrology - Volume 300, Issues 1â4, 10 January 2005, Pages 126-139
نویسندگان
Fred Worrall, Tim Burt,