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Characteristics of the horizontal and vertical distributions of dimethyl sulfide throughout the Amundsen Sea Polynya

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Title
Characteristics of the horizontal and vertical distributions of dimethyl sulfide throughout the Amundsen Sea Polynya
Other Titles
아문젠해 폴리냐 전반에 걸친 DMS의 수평 및 수직 분포의 특성
Authors
Kim, Intae
Lee, Sang H.
Kim, Hyun-cheol
Liqi Chen
Miming Zhang
Choi, Jungok
Lee, YoungJoo
Park, Keyhong
Hahm, Doshick
Subject
Environmental Sciences & Ecology
Keywords
Amundsen Sea; Antractic polynya; Dimethyl sulfide; Membrane inlet mass spectrometer; Southern Ocean
Issue Date
2017
Citation
Kim, Intae, et al. 2017. "Characteristics of the horizontal and vertical distributions of dimethyl sulfide throughout the Amundsen Sea Polynya". SCIENCE OF THE TOTAL ENVIRONMENT, 584-585(0): 154-163.
Abstract
We investigated horizontal and vertical distributions of DMS in the upper water column of the Amundsen Sea Polynya and Pine Island Polynya during the austral summer (January?February) of 2016 using a membrane inlet mass spectrometer (MIMS) onboard the Korean icebreaker R/V Araon. The surface water concentrations of DMS varied from < 1 to 400 nM. The highest DMS (up to 300 nM) were observed in sea ice?polynya transition zones and near the Getz ice shelf, where both the first local ice melting and high plankton productivity were observed. In other regions, high DMS concentration was generally accompanied by higher chlorophyll and ΔO2/Ar. The large spatial variability of DMS and primary productivity in the surface water of the Amundsen Sea seems to be attributed to melting conditions of sea ice, relative dominance of Phaeocystis Antarctica as a DMS producer, and timing differences between bloom and subsequent DMS productions. The depth profiles of DMS and ΔO2/Ar were consistent with the horizontal surface data, showing noticeable spatial variability. However, despite the large spatial variability, in contrast to the previous results from 2009, DMS concentrations and ΔO2/Ar in the surface water were indistinct between the two major domains: the sea ice zone and polynya region. The discrepancy may be associated with inter-annual variations of phytoplankton assemblages superimposed on differences in sea-ice conditions, blooming period, and spatial coverage along the vast surface area of the Amundsen Sea.
URI
http://repository.kopri.re.kr/handle/201206/6311
DOI
http://dx.doi.org/10.1016/j.scitotenv.2017.01.165
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