Massive sedimentation of fine sediment with organic matter and enhanced benthic–pelagic coupling by an artificial dyke in semi-enclosed Chonsu Bay, Korea

Lee, Jae Seong; Kim, Kee Hyun; Shim, JungHee; Han, Jeong Hee; Choi, Yang Ho; Khang, Bhum-Joo

doi:10.1016/j.marpolbul.2011.09.033

Cited by 31 publications

(19 citation statements)

References 33 publications

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“…For example, in the GOM, the sums of nitrate and nitrite fluxes to bottom sediments (e.g., May: −10.05, July: −61.9, August: −48.42 µmol N m −2 h −1 ) were similar or smaller than the flux of ammonium from bottom sediments (e.g., May: 203, July: 152, August: 156 µmol N m −2 h −1 ) off Terrebonne Bay (McCarthy et al, 2015). In the CSK, the sum of the nitrate and nitrite flux to bottom sediments and ammonium flux are 0.5-1.4 mmol N m −2 d −1 and 1.3-9.6 mmol N m −2 d −1 , respectively, which indicated that excess ammonium with ad-ditional nitrate and nitrite were released from sediments in this region (Lee et al, 2012). The release of nitrate and nitrite in the CSK unlike the GOM can be estimated due to high inputs of nitrogen by groundwater in the CSK (G. even though there is minor uptake of nitrate and nitrite.…”

Section: Atmospheric Nitrogen Deposition (An-d) Datamentioning

confidence: 90%

“…Diffusion from groundwater can probably be ignored in the GOM as Rabalais et al (2002) reported that the groundwater discharge is very low in coastal Louisiana, but is likely important elsewhere and is known to be important in the CSK. Based on this, we averaged and sum the fluxes data of nitrate, nitrite and ammonium from McCarthy et al 2015for the GOM and Lee et al (2012) for the CSK, respectively, and then applied F DIN Bott value as 1.2 mmol N m −2 d −1 in the GOM and 6.2 mmol N m −2 d −1 in the CSK. Thus, in Eq.…”

Section: Atmospheric Nitrogen Deposition (An-d) Datamentioning

confidence: 99%

“…Thus, in Eq. 3, the benthic flux term is calculated from existing literature results after considering all DIN fluxes as above (Lee et al, 2012;McCarthy et al, 2015), and then multiplied by the area of each box.…”

Section: Atmospheric Nitrogen Deposition (An-d) Datamentioning

confidence: 99%

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Implications of different nitrogen input sources for potential production and carbon flux estimates in the coastal Gulf of Mexico (GOM) and Korean Peninsula coastal waters

et al. 2020

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Abstract. The coastal Gulf of Mexico (GOM) and coastal sea off the Korean Peninsula (CSK) both suffer from human-induced eutrophication. We used a nitrogen (N) mass balance model in two different regions with different nitrogen input sources to estimate organic carbon fluxes and predict future carbon fluxes under different model scenarios. The coastal GOM receives nitrogen predominantly from the Mississippi and Atchafalaya rivers and atmospheric nitrogen deposition is only a minor component in this region. In the CSK, groundwater and atmospheric nitrogen deposition are more important controlling factors. Our model includes the fluxes of nitrogen to the ocean from the atmosphere, groundwater and rivers, based on observational and literature data, and identifies three zones (brown, green and blue waters) in the coastal GOM and CSK with different productivity and carbon fluxes. Based on our model results, the potential primary production rate in the inner (brown water) zone are over 2 gC m−2 d−1 (GOM) and 1.5 gC m−2 d−1 (CSK). In the middle (green water) zone, potential production is from 0.1 to 2 (GOM) and 0.3 to 1.5 gC m−2 d−1 (CSK). In the offshore (blue water) zone, productivity is less than 0.1 (GOM) and 0.3 (CSK) gC m−2 d−1. Through our model scenario results, overall oxygen demand in the GOM will increase approximately 21 % if we fail to reduce riverine N input, likely increasing considerably the area affected by hypoxia. Comparing the results from the USA with those from the Korean Peninsula shows the importance of considering both riverine and atmospheric inputs of nitrogen. This has direct implications for investigating how changes in energy technologies can lead to changes in the production of various atmospheric contaminants that affect air quality, climate and the health of local populations.

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Section: Atmospheric Nitrogen Deposition (An-d) Datamentioning

confidence: 90%

Section: Atmospheric Nitrogen Deposition (An-d) Datamentioning

confidence: 99%

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Implications of different nitrogen input sources for potential production and carbon flux estimates in the coastal Gulf of Mexico (GOM) and Korean Peninsula coastal waters

et al. 2020

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“…To reduce the ferric ions, ascorbic acid was added to the acidified filtrate solution, and then the Po isotopes ( 209 Po and 210 Po) were spontaneously deposited onto a silver disk at 70°C over a period of 6 hr with stirring. The measurement of activity was continued to obtain sufficient counts (>1,000) by an alpha particle spectrometer equipped with low‐background silicon‐surface barrier detectors (PIPS detector, Canberra, USA; Lee et al, ). The 210 Pb xs was calculated by subtracting the value for supported 210 Pb, the average of 210 Pb activities in the deep sediment layer.…”

Section: Methodsmentioning

confidence: 99%

“…with low-background silicon-surface barrier detectors (PIPS detector, Canberra, USA; Lee et al, 2012). The 210 Pb xs was calculated by subtracting the value for supported 210 Pb, the average of 210 Pb activities in the deep sediment layer.…”

Section: Journal Of Geophysical Research: Biogeosciencesmentioning

confidence: 99%

Sedimentary Organic Carbon Budget Across the Slope to the Basin in the Southwestern Ulleung (Tsushima) Basin of the East (Japan) Sea

Lee

Han

et al. 2019

JGR Biogeosciences

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With the total sediment oxygen uptake rates measured using an in situ benthic chamber, vertical distributions of organic carbon, and sedimentation rates estimated by excess 210Pb across the slope to the basin sediment of the southwestern region of the Ulleung (Tsushima) Basin (UB), the partitioning of organic carbon fluxes in the sediment was estimated to understand the biogeochemical cycles of organic carbon in the high productivity marginal sea. The results of depth attenuation of total oxygen uptake (TOU) demonstrate that the organic carbon oxidation of the UB sediment was 2.5 times higher than that obtained from the empirical relationship of the global's depth attenuation of TOU. Similar to TOU, the high mass accumulation rates observed in the slope region were 9.5 times higher than the rate in the basin, indicating that the slope may act as the depocenter of organic carbon. The organic carbon budget with water depth gradient implies that a significant fraction of the organic carbon deposited into sediment is supplied by lateral transport down the slope. Definite increasing C/N ratio with water depth indicates that the refractory organic carbon seems to be successively transported later from shelf to slope. The total burial flux in the sediment of southwestern UB was estimated to be 0.46±0.04 Tg C/year, which is similar to the megadepocenter of the Congo River fan. Our results imply that the UB sediment may be an important biogeochemical reaction place not only for organic carbon but also materials linked to primary production.

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Benthic Respiration and Nutrient Release Associated with Net Cage Fish and Longline Oyster Aquaculture in the Geoje-Tongyeong Coastal Waters in Korea

Kim

Choi

et al. 2019

Estuaries and Coasts

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Massive sedimentation of fine sediment with organic matter and enhanced benthic–pelagic coupling by an artificial dyke in semi-enclosed Chonsu Bay, Korea

Cited by 31 publications

References 33 publications

Implications of different nitrogen input sources for potential production and carbon flux estimates in the coastal Gulf of Mexico (GOM) and Korean Peninsula coastal waters

Implications of different nitrogen input sources for potential production and carbon flux estimates in the coastal Gulf of Mexico (GOM) and Korean Peninsula coastal waters

Sedimentary Organic Carbon Budget Across the Slope to the Basin in the Southwestern Ulleung (Tsushima) Basin of the East (Japan) Sea

Benthic Respiration and Nutrient Release Associated with Net Cage Fish and Longline Oyster Aquaculture in the Geoje-Tongyeong Coastal Waters in Korea

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