کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6387071 | 1627299 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical impact of an Emiliania huxleyi bloom in the frontal region of the Barents Sea
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
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چکیده انگلیسی
The impact on downwelling irradiance of phytoplankton, cromophoric dissolved organic matter (CDOM) and particulate inorganic carbon (PIC) in the form of coccoliths, is described using a radiative transfer model and field data from the Barents Sea (BS). While annual Emiliania huxleyi blooms in the BS have been detected with satellite remote sensing, this is the first bio-optical field study on E. huxleyi from this area. Bio-optical variables were measured in August 2007 along a transect through the Polar Front from Arctic Water (ArW) into an E. huxleyi bloom in Atlantic Water (AW). The depth of the euphotic zone was on average 52 m in ArW, 45 m in frontal mixed water (FMW) and 21 m in AW. At the 10% irradiance depth in AW, phytoplankton had attenuated 40%, CDOM 17% and PIC 18% of the irradiance from 400 to 700 nm. Numbers from ArW were 36%, 26% and < 1%, respectively. The relative potential for Primary Production (PPpot) in AW was 1.8 à higher than in ArW, and PIC had reduced PPpot in AW by 20-40% at stations with ~ 100-130 mg PIC mâ 3. A novel approach for estimating PIC based on a theoretical relationship between diffuse attenuation and irradiance reflectance is also described.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Marine Systems - Volume 130, February 2014, Pages 228-240
Journal: Journal of Marine Systems - Volume 130, February 2014, Pages 228-240
نویسندگان
Erlend Kjeldsberg Hovland, Kasper Hancke, Morten Omholt Alver, Ken Drinkwater, Jo Høkedal, Geir Johnsen, Mark Moline, Egil Sakshaug,