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High abundance of protein-like fluorescence in the Amerasian Basin of Arctic Ocean: Potential implication of a fall phytoplankton bloom

Title
High abundance of protein-like fluorescence in the Amerasian Basin of Arctic Ocean: Potential implication of a fall phytoplankton bloom
Author
신경훈
Keywords
Dissolved organic matter; Excitation-emission matrix (EEM); Fall phytoplankton bloom; Remote sensing; Arctic Ocean
Issue Date
2017-12
Publisher
ELSEVIER SCIENCE BV
Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v. 599, Page. 355-363
Abstract
The seawater samples from the Chukchi and East Siberian Seas were collected along,a shelf-slope-basin gradient and analyzed for chromophoric and fluorescent DOM (i.e., CDOM and FDOM, respectively). Unexpected high protein -like FDOM (035 +/- 0.40 and 0.24 +/- 0.34 RU for peaks B and T, respectively) levels were identified, which corresponded to 1-2 orders of magnitude higher than those documented by previous reports. This unique phenomenon could be attributed to a fall phytoplankton bloom. The seawater chl-alpha data, estimated from in situ fluorescence measurements and satellite remote sensing data, showed the subsurface chl-a maximum of up to 1.52 mg m(-3) at similar to 25-70 m depths and the surface monthly average values (August 2015) up to 0.55 to 0.71 mg m(-3), which fall in the range of similar to 0.5-2.0 mg m(-3) during fall phytoplankton blooms in this area. Meanwhile, the depth profile of DOM parameters revealed subsurface maxima of protein-like fluorescence peaks along the shelf-slope gradient. The positive correlations between the protein-like peaks and biological index implied the lateral transport of DOM and nutrients from the shelf to the slope and basin. Despite still being a largely ice-covered environment, potential shifts in the ecosystem appear to make progress in response to changing climate in the Arctic Ocean. (C) 2017 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0048969717310859http://repository.hanyang.ac.kr/handle/20.500.11754/72841
ISSN
0048-9697; 1879-1026
DOI
10.1016/j.scitotenv.2017.04.233
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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