Sources of organic carbon in the Portuguese continental shelf sediments during the Holocene period

2008 ◽  
Vol 23 (10) ◽  
pp. 2857-2870 ◽  
Author(s):  
D. Burdloff ◽  
M.F. Araújo ◽  
J.-M. Jouanneau ◽  
I. Mendes ◽  
A.M. Monge Soares ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Continental Shelf ◽  
The Holocene ◽  
Shelf Sediments ◽  
Holocene Period

Sources of organic carbon and depositional environment in the Bengal delta plain sediments during the Holocene period

Limnology ◽  
2009 ◽  
Vol 11 (2) ◽  
pp. 133-142 ◽  
Author(s):  
Hossain M. Anawar ◽  
Takahito Yoshioka ◽  
Eiichi Konohira ◽  
Junji Akai ◽  
M. C. Freitas ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Depositional Environment ◽  
The Holocene ◽  
Bengal Delta ◽  
Delta Plain ◽  
Holocene Period

scholarly journals Marine Sedimentary Carbon Stocks of the United Kingdom’s Exclusive Economic Zone

2021 ◽  
Vol 9 ◽  
Author(s):  
Craig Smeaton ◽  
Corallie A. Hunt ◽  
William R. Turrell ◽  
William E. N. Austin
Keyword(s):  
Organic Carbon ◽  
Continental Shelf ◽  
Spatial Heterogeneity ◽  
Global Climate ◽  
Exclusive Economic Zone ◽  
C Cycle ◽  
Shelf Sediments ◽  
Economic Zone ◽  
Muddy Sediments ◽  
The Uk

Continental shelf sediments are recognized as long-term stores of globally significant quantities of carbon (C) and potentially provide an important, yet largely overlooked climate regulation service via the Earth’s C cycle. Current understanding of the spatial distribution of sedimentary C across continental shelves remains poor, inhibiting the targeted management and potential inclusion of these globally significant C stores into national C budgets. Further understanding of the spatial heterogeneity of continental shelf sediments and associated C provides a foundation to quantify the organic carbon (OC) stock and better understand the role that marine sediments play in regulating the global climate and the potential for CO2 to be released through anthropogenic disturbance of these C stores. Utilizing a spectrum of available marine data, we have created bespoke sediment maps that quantify the surficial (top 10 cm) OC stock and highlight significant spatial heterogeneity in the distribution of sediments and their associated C content across the United Kingdom’s Exclusive Economic Zone (EEZ). The surficial sediments within the UK EEZ are estimated to store 524 ± 68 Mt of organic carbon (OC) and 2,582 ± 168 Mt of inorganic carbon (IC). The spatial mapping of this C highlights well-defined OC accumulation hotspots in fjords, estuaries and coastal muds, while large accumulations of IC are found in the tidally swept areas around Orkney, Shetland and the South West of England. Within the well-defined OC hotspots, muddy sediments store the greatest quantity of OC; the muds offer potentially valuable opportunities for targeted future management and protection of sedimentary C stores within the UK EEZ. In the future, if areas of the seafloor were to be managed to include the protection of these valuable sedimentary C resources, we recommend an initial focus on hotspots of high sedimentary OC density.

Organic carbon isotope ratios (δ 13 C) of Arctic Amerasian Continental shelf sediments

2000 ◽  
Vol 89 (3) ◽  
pp. 522-532 ◽  
Author(s):  
A. S. Naidu ◽  
L. W. Cooper ◽  
B. P. Finney ◽  
R. W. Macdonald ◽  
C. Alexander ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Continental Shelf ◽  
Carbon Isotope ◽  
Isotope Ratios ◽  
Carbon Isotope Ratios ◽  
Organic Carbon Isotope ◽  
Shelf Sediments

The vulnerability of Arctic shelf sediments to climate change

2015 ◽  
Vol 23 (4) ◽  
pp. 461-479 ◽  
Author(s):  
Robie W. Macdonald ◽  
Zou Zou A. Kuzyk ◽  
Sophia C. Johannessen
Keyword(s):  
Organic Carbon ◽  
Carbon Sources ◽  
The Arctic ◽  
Sedimentary Environments ◽  
Carbon Supply ◽  
Shelf Sediment ◽  
Wide Range ◽  
Metabolic Conditions ◽  
Shelf Sediments ◽  
Ocean Ecosystem

The sediments of the pan-Arctic shelves contribute an important component to the Arctic Ocean ecosystem by providing a habitat for biota (benthos), a repository for organic and inorganic non-conservative substances entering or produced within the ocean, a reactor and source of transformed substances back to the water column, and a mechanism of burial. Sediments interact with ice, ocean, and the surrounding land over a wide range of space and time scales. We discuss the vulnerability of shelf sediment to changes in (i) organic carbon sources, (ii) pathways of sediment and organic carbon supply, and (iii) physical and biogeochemical alteration (diagenesis). Sedimentary environments of the shelves and basins are likely to exhibit a wide variance in their response to global change because of their wide variation in sediment sources, processes, and metabolic conditions. In particular, the Chukchi and Barents shelves are dominated by inflowing waters from oceans to the south, whereas the interior shelves are more closely tied to terrigenous sources due to river inflow and coastal erosion.

A multiproxy approach to characterize the sedimentation of organic carbon in the Amazon continental shelf

2021 ◽  
Vol 232 ◽  
pp. 103961
Author(s):  
Rodrigo de L. Sobrinho ◽  
Marcelo C. Bernardes ◽  
Carlos Eduardo de Rezende ◽  
Jung-Hyun Kim ◽  
Stefan Schouten ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Continental Shelf ◽  
Multiproxy Approach
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