کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4534807 1326061 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-resolution observations of aggregate flux during a sub-polar North Atlantic spring bloom
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
High-resolution observations of aggregate flux during a sub-polar North Atlantic spring bloom
چکیده انگلیسی

An aggregate flux event was observed by ship and by four underwater gliders during the 2008 sub-polar North Atlantic spring bloom experiment (NAB08). At the height of the diatom bloom, aggregates were observed as spikes in measurements of both particulate backscattering coefficient (bbp) and chlorophyll a fluorescence. Optical sensors on the ship and gliders were cross-calibrated through a series of simultaneous profiles, and bbp was converted to particulate organic carbon. The aggregates sank as a discrete pulse, with an average sinking rate of ∼75 m d−1; 65% of aggregate backscattering and 90% of chlorophyll fluorescence content was lost between 100 m and 900 m. Mean aggregate organic carbon flux at 100 m in mid-May was estimated at 514 mg C m−2 d−1, consistent with independent flux estimates. The use of optical spikes observed from gliders provides unprecedented coupled vertical and temporal resolution measurements of an aggregate flux event.


► We tracked an aggregate flux event using optical spikes.
► Aggregates formed during a spring diatom bloom in the North Atlantic.
► Aggregate flux event lasted ∼10 days.
► Aggregates sank at ∼75 m d−1.
► Carbon flux at 100 m was estimated at 514 mg C m−2 d−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 58, Issue 10, October 2011, Pages 1031–1039
نویسندگان
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