کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5765200 | 1626613 | 2017 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Biogeochemical impact of submarine ground water discharge on coastal surface sands of the southern Baltic Sea
ترجمه فارسی عنوان
اثر بیوگرافی شیمیایی تخلیه آب زیرزمینی آبهای زیرزمینی در ماسه های سطح ساحلی دریای جنوب دریای بالتیک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
This study evaluates the effect of submarine ground water discharge (SGD) on biogeochemical processes of sandy sediments of Hel Bight (Poland) in the shallow southern Baltic Sea, using stirred benthic chambers combined to seepage meters, deep pore water profiles and a reactive transport model. The main impacts of fresh anoxic groundwater seepage are due to (1) the efflux of methane; (2) the efflux of phosphate and silicate; (3) the efflux of dissolved organic carbon (DOC) of aquifer origin. Methane from SGD is assumed to be only slightly oxidized within the sediments and potentially reach the atmosphere at a maximum rate of 30 mmol CH4 mâ2 dâ1. Silicate and phosphate supplied by SGD promote a seep-site net community production rate that is more than twice as compared to adjacent non seeping sites (70 and 30 mmol C mâ2 dâ1 respectively). However, oxygen uptake rates at the seep site during the night (30 mmol O2 mâ2 dâ1) are lower than those observed at the reference sites (50 mmol O2 mâ2 dâ1). We hypothesize that autogenic, relatively labile DOC is available at the reference site, leading to higher oxygen uptake rates as compared to the seep sites where it is being replaced by less reactive DOC originating from the ground water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 189, 5 April 2017, Pages 131-142
Journal: Estuarine, Coastal and Shelf Science - Volume 189, 5 April 2017, Pages 131-142
نویسندگان
Daphne Donis, Felix Janssen, Bo Liu, Frank Wenzhöfer, Olaf Dellwig, Peter Escher, Alejandro Spitzy, Michael E. Böttcher,