Direct observations of diel biological CO2 fixation on the Scotian Shelf, northwestern Atlantic Ocean
Helmuth ThomasSusanne E. CraigB. J. W. GreenanWayne V. BurtGerhard J. HerndlSimon HigginsonLesley SaltElizabeth H. ShadwickJorge Urrego‐Blanco
0
Citation
0
Reference
9
Related Paper
Keywords:
Diel vertical migration
Cite
This is a final report for the DOE of grant DE-FG02-92ER61464 ''Surficial bioturbation and rapid benthic remineralization in the Cape Hatteras shelf slope region''. Over the past 6 years we have participated in a multidisciplinary field study called the Ocean margins Program (OMP) to examine the importance of continental margins in the global carbon cycle. Specifically, we have focused on the southern portion of the Mid-Atlantic Bight between Cape Hatteras and Chesapeake Bay where a large flux of freshwater and organic carbon enters the North Atlantic Ocean. Additionally, during the first stage of this project, we developed the use of CM-a distributions in sediments as a quantitative indicator of benthic C flux and remineralization rates. The primary objective of our research group has been to understand mechanisms and quantify biogeochemical processes in the seabed that affect cycling, flux, and storage of carbon on the ocean margin of the Mid-Atlantic Bight.
Bioturbation
Seabed
Biogeochemical Cycle
Continental Margin
Cape
Cite
Citations (0)
Cite
Citations (1)
Cycling
Carbon fibers
Cite
Citations (0)
The relations for the surface layers of sediments are discussed first. The CaCO3 content depends upon the distribution of organisms, the admixture of terrigenous detritus, and the solution of calcareous particles of organic origin. Chemical precipitation of lime does not take place in the sea. The organic content of the sediments and the content of siliceous organisms are discussed. In the red clay, organic substances are deposited that are relatively resistant to decomposition compared with those laid down in blue mud, which is deposited more rapidly.
Terrigenous sediment
Detritus
Cite
Citations (15)
Data are reported from KNORR cruise 68, the major investigation of the third Atlantic Coastal Experiment (ACE), conducted during a period of pro-nounced water-column stratification. One hundred fifty-five stations, including 6 time-series sitings, were occupied within the shelf and shelf- break regimes of New York Bight. Measurements were made to assess water-mass characterization, nutrient cycling, carbon/nitrogen assimilation, bio-mass distribution and diel dynamics and benthic/water-column interfacial exchange. Data are also included from the cruise of ALBATROSS IV carried out contemporaneously with the KNORR investigations, in an area ranging from Nantucket Shoals to the upper reaches of the Gulf of Maine. 20 hydrographic stations were used to augment underway mapping in order to elucidate surface-layer chlorophyll and nutrient distributions occurring at an impor-tant boundary of the New York Bight.
Diel vertical migration
Shoal
Stratification (seeds)
Cite
Citations (0)
Cite
Citations (0)
The present paper forms a sequel to the account of the temperature of the same region (Bigelow, 1933)... the continental shelf between the offings of Cape Cod (longitude about 70°) and Chesapeake Bay;-extended southward, for occasional months, to the offing of Cape Hatteras; and with such discussion of conditions along the continental slope as is justified by occasional profiles.
Chesapeake bay
Cape
Longitude
Cite
Citations (54)