Anomalous distribution of dissolved organic carbon in the Sea of Japan.

Yamaguchi, Yoshitaka; Nakaguchi, Yoshitsugu; Hattori, Hiroshi; Kimura, Munehito; Hiraki, Kei

doi:10.2343/geochemj.35.355

Cited by 3 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2). Though EEM-PARAFAC was firstly applied for the JSPW in the present study, similar vertical distributions of FDOM H were previously observed in the Japan Sea by measuring the fluorescence intensities at a single pair of excitation (320 nm) and emission (420 nm) wavelengths3438 and by using EEM33. In the western North Pacific, the amounts of FDOM H -1 and FDOM H -2 were also lowest in the surface waters, followed by an increase with depth that peaked at 1000–1500 m and then decreased slightly with depth (Fig.…”

Section: Resultssupporting

confidence: 63%

See 1 more Smart Citation

Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea

Tanaka

Kuma

Hamasaki

et al. 2014

Sci Rep

View full text Add to dashboard Cite

Major fraction of marine dissolved organic matter (DOM) is biologically recalcitrant, however, the accumulation mechanism of recalcitrant DOM has not been fully understood. Here, we examine the distributions of humic-like fluorescent DOM, factions of recalcitrant DOM, and the level of apparent oxygen utilization in the Japan Sea. We find linear relationships between these parameters for the deep water (>200 m) of the Japan Sea, suggesting that fluorescent DOM is produced in situ in the Japan Sea. Furthermore, we find that the amount of fluorescent DOM at a given apparent oxygen utilization is greater in the deep water of the Japan Sea than it is in the North Pacific, where the highest level of fluorescent DOM in the open ocean was previously observed. We conclude that the repeated renewal of the deep water contributes to the accumulation of fluorescent DOM in the interior of the Japan Sea.

show abstract

Section: Resultssupporting

confidence: 63%

“…Though only a few studies have clarified the distributional patterns of DOM in the Japan Sea, it was reported that DOC concentrations in the JSPW were higher than those in deep waters of the North Pacific 33 . Such high levels of DOC are possibly due to transport of semi-labile DOC from surface layers 1 along with the JSPW formation.…”

mentioning

confidence: 99%

Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea

Tanaka

Kuma

Hamasaki

et al. 2014

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The potential temperatures in deep water below 2000 m are almost constant at 0.06–0.1°C from the Japan Basin to the southern Yamato Basin, although higher temperatures occur in the surface layer at 18.4–26.9°C. Several studies related to this cruise have been reported for hydrographic data, dissolved oxygen, nutrients, tritium [ Gamo , 1999; Gamo et al , 2001], dissolved organic carbon [ Yamaguchi et al , 2001], silver [ Zhang et al , 2001], and cadmium [ Abe , 2005] in the Sea of Japan. Those studies reflect the unique features of the Sea of Japan's marine geochemistry.…”

Section: Resultsmentioning

confidence: 99%

Dissolved aluminum, indium, and cerium in the Sea of Japan and the Sea of Okhotsk: Comparison to the marginal seas of the western North Pacific

2007

View full text Add to dashboard Cite

[1] Dissolved aluminum, indium, and cerium were measured in seawater from the Sea of Japan and the Sea of Okhotsk. Surface maxima of Al in the eastern Japan Basin indicate a signature of atmospheric mineral dust deposition resembling that of In. Data from all stations in this study show that Ce was markedly high in well-oxygenated bottom waters. The Ce:Al ratios of settling particles and surface sediments implicate the benthic flux of Ce as its cause. The In:Al ratios found in this study are not as high as those of the South China Sea and Sulu Sea, suggesting the minor influence of atmospheric deposition on the In:Al ratios in seawater. Fractionation between In and Al during scavenging processes, in addition to input from the bottom sediment, might contribute to the In enrichment of seawater. Apparent differences between In and Ce distributions in the marginal seas show that the benthic supply mechanism of In is not merely a simple redox-related process.

show abstract

“…Therefore, 3D-EEMs is an effective method for the characterization of fluorescent organic matter in sea water. Fluorescent organic matter which seems to be refractory organic substances is present in the deep layer of the Pacific Ocean (Hayase and Shinozuka, 1995;Yamaguchi et al, 2001;Nakaguchi et al, 2003). 3D-EEMs were measured by using the same samples which were collected by the R/V Hakuho-Maru KH-02-4 cruise.…”

Section: The Relationship Between Organic Selenide and Fluorescent Ormentioning

confidence: 99%

“…The analytical procedure for 3D-EEMs has been described elsewhere (Yamaguchi et al, 2001). Only a brief description is given here.…”

Section: D-eems Analysismentioning

confidence: 99%

Dissolved selenium species in the Sulu Sea, the South China Sea and the Celebes Sea

et al. 2004

Self Cite

View full text Add to dashboard Cite

We have measured the vertical profiles of selenite, selenate and organic selenide in the Southeast Asian Basins (the Celebes Sea, the Sulu Sea and the South China Sea) for the two years, 1996 and 2002. Total selenium, selenite and selenate showed nutrient-like profiles. In particular, the vertical profiles of selenate and organic selenide in the Sulu Sea differed greatly between 1996 and 2002. The salinity and selenite/selenate ratio in the surface layer showed that the Sulu Sea surface water in these two years was derived from different sources. The vertical profiles of selenite, selenate and organic selenide in the South China Sea in 1996 and 2002 were almost the same. Both selenite and selenate were slightly elevated at the surface in the South China Sea. These inorganic selenium species seemed to be derived from atmospheric input, admixture of the East China Sea surface water, West Philippine Sea surface water, and fluvial, coastal and shelf waters of the South China Sea. The relationship between the concentration of organic selenide and the relative fluorescent intensity of fluorescent organic matter in the South China Sea suggested the organic selenide exists in the refractory DOC fraction possibility as humic-like substances. The total dissolved selenium concentration and the selenite/selenate ratio in deep water indicated that the water mass age of the Celebes Sea deep water was similar to that of the western North Pacific deep water. On the other hand, the water mass age of the Sulu Sea is younger than that of the western North Pacific. The selenite/selenate ratio in the South China Sea deep water was two times higher than that of the western North Pacific. This result suggested that a large amount of organic detritus was supplied to the South China Sea, and then the organic selenide in the organic detritus rapidly oxidized to selenite.

show abstract

Anomalous distribution of dissolved organic carbon in the Sea of Japan.

Cited by 3 publications

References 20 publications

Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea

Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea

Dissolved aluminum, indium, and cerium in the Sea of Japan and the Sea of Okhotsk: Comparison to the marginal seas of the western North Pacific

Dissolved selenium species in the Sulu Sea, the South China Sea and the Celebes Sea

Contact Info

Product

Resources

About