Proximate Constituents in the Sea-grasses Zostera marina and Z. noltii in Ireland: Seasonal Changes and the Effect of Blade Removal     

Clinton J.  Dawes Michael D.  Guiry 《Marine Ecology》1992,13(4):307-315

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Wave climate in a groin field     

V. Sundar  H. Noethel  K. P. Holz 《Ocean Engineering》1992,19(5)

Wave records at seven different locations within a groin field have been analysed by both statistical and spectral approaches to study the general wave climate. The wave heights and periods from the wave records were obtained by both upcross and downcross methods for the statistical approach. The variation of different wave height and wave period parameters with respect to the time of measurement at a particular location and its variation at different locations within the groin field at a particular instant of time are presented and discussed in detail in this paper. It is generally found that the wave heights follow the Weibull distribution.  相似文献   

The role of organic coatings in the enrichment of marine particles with selenium. The fixation of selenite on an adsorbed amino acid     

R. Cohen  D. Schuhmann  F. Sinan  P. Vanel 《Marine Chemistry》1992,40(3-4)

The enrichment of marine particles with selenium cannot be explained as that with metals present in cationic form by complexation with anionic functional groups of adsorbed organic matter. Physicochemical data obtained using a model system are reported. The surface of the particles is modelized by a mercury electrode whose surface charge density can be easily changed, covered by a layer of adsorbed polymers. Studies with different kinds of macromolecules and salts show a specific interaction between adsorbed polyalanine and selenite. The results can be explained by the concordance of the distances between two oxygen atoms in this oxyanion and between two amine groups of the adsorbed polypeptide. A similar mechanism could occur in marine aggregates whatever their nature, as long as they contain amine groups at their surface which result in this concordance. Some prospects derived from the results are discussed.  相似文献   

Intraspecific variation in the life history tactics of Atlantic herring (Clupea harengus L.) stocks   总被引：1，自引：0，他引：1  

Jennings  S.; Beverton  R. J. H. 《ICES Journal of Marine Science》1991,48(1):117-125

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Sea-floor observations in the tongue of the ocean,Bahamas: An Argo/SeaMARC survey     

William C. Schwab  Elazar Uchupi  Robert D. Ballard  Thomas K. Dettweiler 《Geo-Marine Letters》1989,9(3):171-178

SeaMARC side-scan sonographs and Argo video and photographic data suggest that the recent sedimentary environment of the floor of the Tongue of the Ocean is controlled by an interplay of turbidity current flow from the south, sediment spill-over from the carbonate platform to the east (windward side), and rock falls from the west carbonate escarpment (lee side). The spill-over forms a sandy sedimentary deposit that acts as a topographic obstruction to the turbidity current flow from the south. This obstruction is expressed by the westward migration of a northwest-southeast oriented turbidity-current-cut channel.  相似文献   

Letter to Editor: Comments on: “Semi-analytical quasi-static formulation for three-dimensional partially grounded mooring systems problems” by Y.T. Chai, K.S. Varyani and N.D.P. Barltrop, 2002. Ocean Engineering 29, 627-649.     

P. A. A. Laura  C. A. Rossit  D. V. Bambill 《Ocean Engineering》2003,30(7):949-950

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Heave compensation and formation strength evaluation from downhole acceleration measurements while coring   总被引：1，自引：0，他引：1  

G. Guerin  D. Goldberg 《Geo-Marine Letters》2002,22(3):133-141

In order to evaluate the efficiency of heave compensation in the Ocean Drilling Program, we developed a device measuring the acceleration of the core barrels. First results show that heave compensation limits bit motion to 10% of the surface heave. We also use the acceleration data to characterize the formation. On rotary corers, acceleration amplitudes decrease with increasing hardness of the formation. Comparison with geophysical logs shows that this relationship can resolve cm-scale features. On piston corers, the maximum acceleration is characteristic of the sediment shear strength. Easy and fast to deploy, this tool allows to characterize formations before any sample analysis.  相似文献   

Investigating spatio-temporal change in spawning activity by Atlantic mackerel between 1977 and 1998 using generalized additive models   总被引：1，自引：3，他引：1  

Beare  D. J.; Reid  D. G. 《ICES Journal of Marine Science》2002,59(4):711-724

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Special issue on ocean governance and capacity building     

Hance D. Smith  Associate Editor  Jonathan Potts  Specialist-Marine Environment   《Marine Policy》2001,25(6):389

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Tectonics at the intersection of the East Pacific Rise with Tamayo Transform fault     

Gallo  D. G.  Kidd  W. S. F.  Fox  P. J.  Karson  J. A.  Macdonald  K.  Crane  K.  Choukroune  P.  Seguret  M.  Moody  R.  Kastens  K. 《Marine Geophysical Researches》1984,6(2):159-185

During the Fall of 1979, a manned submersible program, utilizing DSRV ALVIN, was carried out at the intersection of the East Pacific Rise (EPR) with the Tamayo Transform boundary. A total of seven dives were completed in the vicinity of the EPR/Tamayo intersection depression and documented the geologic relationships that characterize the juxtaposition of these types of plate boundaries. The young volcanic terrain of the EPR axis can be traced into and across the Tamayo Transform valley but becomes buried by sedimentary talus that is being shed from sediment scarps along the unstable sediment slope that defines the north side of the intersection depression. Within 4 km of the transform boundary, the dominant trend (000°) of the fissures and faults that disrupt the rise-generated volcanics is markedly oblique to the regional direction of sea floor spreading (120°). Since no evidence was found to suggest that these structures accommodate significant amounts of strike-slip displacement, they are taken to reflect a distortion of the EPR extensional tectonic regime by a transform generated shear couple. The floor of the Tamayo Transform valley in this area is inundated by mass-wasted sediment, and the principal transform displacement zone is characterized at the surface by a narrow (<1.5 km) interval of fault scarps in sediment that trends parallel with the transform valley. Extrapolated to the west, this zone links with zones of transform deformation investigated during earlier submersible studies (CYAMEX and Pastouret, 1981). Evidence of low-level hydrothermal discharge was seen at one locality on the EPR axis and at another 8 km west of the axis at the edge of the zone of transform deformation.  相似文献