Low organic carbon accumulation rates in Black Sea sediments

Nature ◽  
1991 ◽  
Vol 350 (6320) ◽  
pp. 692-695 ◽  
Author(s):  
S. E. Calvert ◽  
R. E. Karlin ◽  
L. J. Toolin ◽  
D. J. Donahue ◽  
J. R. Southon ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Black Sea ◽  
Carbon Accumulation ◽  
Accumulation Rates ◽  
Carbon Accumulation Rates

scholarly journals Modeling Organic Carbon Accumulation Rates and Residence Times in Coastal Vegetated Ecosystems

2019 ◽  
Vol 124 (11) ◽  
pp. 3652-3671 ◽  
Author(s):  
E. Fay Belshe ◽  
Jose Sanjuan ◽  
Carmen Leiva‐Dueñas ◽  
Nerea Piñeiro‐Juncal ◽  
Oscar Serrano ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Accumulation ◽  
Residence Times ◽  
Accumulation Rates ◽  
Carbon Accumulation Rates

scholarly journals Soil organic carbon accumulation rates on Mediterranean abandoned agricultural lands

2021 ◽  
Vol 759 ◽  
pp. 143535
Author(s):  
Stephen M. Bell ◽  
César Terrer ◽  
Carles Barriocanal ◽  
Robert B. Jackson ◽  
Antoni Rosell-Melé
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Accumulation ◽  
Accumulation Rates ◽  
Agricultural Lands ◽  
Carbon Accumulation Rates

scholarly journals Carbon Sequestration Rate Estimates in Delaware Bay and Barnegat Bay Tidal Wetlands Using Interpolation Mapping

Data ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 11
Author(s):  
Champlin ◽  
Velinsky ◽  
Tucker ◽  
Sommerfield ◽  
Laurent ◽  
...  
Keyword(s):  
Spatial Analysis ◽  
Carbon Sequestration ◽  
Organic Carbon ◽  
Sediment Cores ◽  
Delaware Bay ◽  
Carbon Accumulation ◽  
Tidal Wetlands ◽  
Accumulation Rates ◽  
Barnegat Bay ◽  
Carbon Accumulation Rates

Quantifying carbon sequestration by tidal wetlands is important for the management of carbon stocks as part of climate change mitigation. This data publication includes a spatial analysis of carbon accumulation rates in Barnegat and Delaware Bay tidal wetlands. One method calculated long-term organic carbon accumulation rates from radioisotope-dated (Cs-137) sediment cores. The second method measured organic carbon density of sediment accumulated above feldspar marker beds. Carbon accumulation rates generated by these two methods were interpolated across emergent wetland areas, using kriging, with uncertainty estimated by leave-one-out cross validation. This spatial analysis revealed greater carbon sequestration within Delaware, compared to Barnegat Bay. Sequestration rates were found to be more variable within Delaware Bay, and rates were greatest in the tidal freshwater area of the upper bay.

scholarly journals Spatial and temporal organic carbon burial along a fjord to coast transect: A case study from Western Norway

The Holocene ◽  
2017 ◽  
Vol 27 (9) ◽  
pp. 1325-1339 ◽  
Author(s):  
CJ Duffield ◽  
E Alve ◽  
N Andersen ◽  
TJ Andersen ◽  
S Hess ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Isotopes ◽  
Accumulation Rate ◽  
Carbon Accumulation ◽  
Individual Species ◽  
Accumulation Rates ◽  
Foraminiferal Assemblage ◽  
Assemblage Composition ◽  
Western Norway ◽  
Carbon Accumulation Rates

We investigated spatial and temporal changes in accumulation rate and source of organic carbon on a gradient along the Lysefjord and the more coastal Høgsfjord, Western Norway. This was achieved through analysis of total organic carbon and nitrogen content of sediment cores, which were radiometrically dated to the early 19th and 20th centuries for the Høgsfjord and Lysefjord, respectively. Benthic foraminifera (protists) were utilized to determine changes in organic carbon supply and Ecological Quality Status (EcoQS) by their accumulation rate (benthic foraminiferal accumulation rate (BFAR)), assemblage composition, species diversity, individual species responses and the composition of stable carbon isotopes of the tests (shells) of Cassidulina laevigata, Hyalinea balthica and Melonis barleeanus. Organic carbon accumulation rates were greatest closest to the river Lyse at the head of the Lysefjord (83–171 g C m−2 yr−1). The organic carbon at the head of the fjord is mainly terrestrial in origin, and this terrestrial influence becomes progressively less seaward. The δ13C in H. balthica tests as well as the benthic foraminiferal assemblage composition also showed a clear fjord to coast gradient. Organic carbon accumulation rates were lower and less variable at the seaward study sites (13–61 g C m−2 yr−1). We observe no temporal trend in organic carbon, carbon isotopes, EcoQS or foraminiferal assemblage composition in the Lysefjord. In contrast, in the Høgsfjord, there seems to have been an increase in organic carbon accumulation rates during the 1940s. Subsequent accumulation rates are stable. The foraminiferal assemblages in the surface sediments reflect a recent transition from good/moderate to moderate/bad EcoQS.

scholarly journals Distribution and origin of organic matter in the Baltic Sea sediments dated with 210Pb and 137Cs

2012 ◽  
Vol 39 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Aleksandra Szczepańska ◽  
Agata Zaborska ◽  
Anna Maciejewska ◽  
Karol Kuliński ◽  
Janusz Pempkowiak
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Carbon Cycle ◽  
Baltic Sea ◽  
Sediment Accumulation ◽  
Carbon Accumulation ◽  
Accumulation Rates ◽  
The Baltic Sea ◽  
The Baltic ◽  
Carbon Accumulation Rates

Abstract Organic carbon deposited in marine sediments is an important part of the global carbon cycle. The knowledge concerning the role of shelf seas (including the Baltic Sea) in the carbon cycle has increased substantially, however organic carbon accumulation rates in the Baltic sediments still require clarification. This paper describes methods used for assessing organic carbon and nitrogen accumulation rates in six sediment cores collected in the sediment accumulation areas in the Baltic Sea. Mass sediment accumulation rates were based on 210Pb method validated by 137Cs measurements. The organic carbon accumulation rates ranged from 18 to 75 g·C·m−2·yr−1. The C/N ratios and δ13C were used to access sedimentary organic matter provenance. The C/N ratios in the investigated cores vary in the range from 7.4 to 9.6, while δ13C ranged from −24.4‰ to −26.4‰. Results of the terrestrial organic matter contribution in the sedimentary organic matter were calculated basing on δ13C using the end member approach. Large proportion (41–73%) of the sedimentary organic carbon originates on land. The obtained results indicate the Baltic Sea sediments as an important sink for organic carbon. Substantial fraction of the sedimentary load originates on land.

scholarly journals A synthesis of modern organic carbon accumulation rates in coastal and aquatic inland ecosystems

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Grace M. Wilkinson ◽  
Alice Besterman ◽  
Cal Buelo ◽  
Jessica Gephart ◽  
Michael L. Pace
Keyword(s):  
Organic Carbon ◽  
Carbon Accumulation ◽  
Accumulation Rates ◽  
Carbon Accumulation Rates
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