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Characteristics of the surface water DMS and pCO2 distributions and their relationships in the Southern Ocean, southeast Indian Ocean, and northwest Pacific Ocean

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Title
Characteristics of the surface water DMS and pCO2 distributions and their relationships in the Southern Ocean, southeast Indian Ocean, and northwest Pacific Ocean
Other Titles
남극해, 남동인도양, 북서태평양의 표층수에서의 DMS와 pCO2의 분포와 상관관계
Authors
Miming Zhang
Jianjun Wang
Jinpei Yan
Tingting Zhu
Bo Yang
Intae Kim
Park, Keyhong
Zhongyong Gao
Heng Sun
Liqi Chen
C.A.Marandino
Subject
Environmental Sciences & Ecology; Geology; Meteorology & Atmospheric Sciences
Keywords
DMS; characteristics; pCO2; relationships; the Southern Ocean; underway measurements
Issue Date
2017
Citation
Miming Zhang, et al. 2017. "Characteristics of the surface water DMS and pCO2 distributions and their relationships in the Southern Ocean, southeast Indian Ocean, and northwest Pacific Ocean". GLOBAL BIOGEOCHEMICAL CYCLES, 31(8): 1318-1331.
Abstract
Oceanic dimethyl sulfide (DMS) is of interest due to its critical influence on atmospheric sulfur compounds in the marine atmosphere and its hypothesized significant role in global climate. High-resolution shipboard underway measurements of surface seawater DMS and the partial pressure of carbon dioxide (pCO2) were conducted in the Atlantic Ocean and Indian Ocean sectors of the Southern Ocean (SO), the southeast Indian Ocean, and the northwest Pacific Ocean from February to April 2014 during the 30th Chinese Antarctic Research Expedition. The SO, particularly in the region south of 58°S, had the highest mean surface seawater DMS concentration of 4.1 ± 8.3 nM (ranged from 0.1 to 73.2 nM) and lowest mean seawater pCO2 level of 337 ± 50 μatm (ranged from 221 to 411 μatm) over the entire cruise. Significant variations of surface seawater DMS and pCO2 in the seasonal ice zone (SIZ) of SO were observed, which are mainly controlled by biological process and sea ice activity. We found a significant negative relationship between DMS and pCO2 in the SO SIZ using 0.1° resolution, [DMS] seawater = 0.160 [pCO2] seawater + 61.3 (r2 = 0.594, n = 924, p < 0.001). We anticipate that the relationship may possibly be utilized to reconstruct the surface seawater DMS climatology in the SO SIZ. Further studies are necessary to improve the universality of this approach.
URI
http://repository.kopri.re.kr/handle/201206/6062
DOI
http://dx.doi.org/10.1002/2017GB005637
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