کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
6387111 1627300 2014 10 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Model study on present and future eutrophication and nitrogen fixation in the Gulf of Finland, Baltic Sea
ترجمه فارسی عنوان
مطالعه مدل ائتروفیکی در حال حاضر و آینده و تثبیت نیتروژن در خلیج فنلاند، دریای بالتیک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی


- The response of nutrient fields to climate change by the end of the 21st century was evaluated for the Gulf of Finland.
- In the future, near-bottom oxygen will decrease, and anoxic conditions will frequently occur below a 60 m depth.
- This will coincide with increased phosphate in the deeper areas. The near-bottom nitrate concentrations will decrease.
- The future projection simulation indicates a considerable increase in nitrogen fixation in the western and central GoF.

The response of nutrient and chlorophyll fields to climate change by the end of the twenty-first century was evaluated in the Gulf of Finland (Baltic Sea) using comparison of a hindcast simulation for 1997-2006 and future climate forcing, assuming an A1B greenhouse gas emission scenario and business-as-usual riverine nutrient load for 2090-2099. The comparison of simulated oxygen, phosphate and nitrate levels from the hindcast model with the measurements indicated a good performance of the 3D ecosystem model, except for overestimated near-bottom layer nitrates. The mean chlorophyll level was slightly overestimated by the model, whereas the variability in the surface layer chlorophyll level was well reproduced. Future projection simulations indicate no considerable changes in the upper layer oxygen concentrations compared with the hindcast simulation and observations, but deeper near-bottom layers were projected to become anoxic, causing an increase in phosphate and a decrease in nitrate concentrations in these layers. The increase in surface layer phosphate and the decrease in nitrate concentrations lead to an increase in summer cyanobacteria blooms and an increase in nitrogen fixation, which therefore led to an increase in the annual mean chlorophyll content in the upper layer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Marine Systems - Volume 129, January 2014, Pages 76-85
نویسندگان
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