scholarly journals Icthyoplankton of Slope and Gulf Stream Waters off Nova Scotia in late Autumn 1974

1982 ◽  
Vol 3 ◽  
pp. 127-139 ◽  
Author(s):  
S A Evseenko
Keyword(s):  
Nova Scotia ◽  
Gulf Stream ◽  
Late Autumn ◽  
Stream Waters

FATE OF PETROLEUM COMPONENTS IN ESTUARINE WATERS OF THE SOUTHEASTERN UNITED STATES

1977 ◽  
Vol 1977 (1) ◽  
pp. 611-616 ◽  
Author(s):  
Richard F. Lee
Keyword(s):  
Water Samples ◽  
Gulf Stream ◽  
Atlantic Coast ◽  
Low Molecular Weight ◽  
Degradation Rates ◽  
Polycyclic Aromatic ◽  
Benzene Toluene ◽  
South Atlantic Coast ◽  
Detrital Particles ◽  
Stream Waters

ABSTRACT Radiolabeled hydrocarbons and phenols were added to water samples from the Skidaway and Cooper Rivers, two estuarine rivers on the U.S. south Atlantic coast. The adsorption of hydrocarbons to particles and microbial degradation of different petroleum components were the processes studied. Alkanes, low molecular weight aromatics (benzene, toluene, naphthalene and methylnaphthalene) and phenols were rapidly degraded to 14CO2. Low degradation rates were observed for the higher weight polycyclic aromatic hydrocarbons, fluorene, anthracene, benz(a)anthracene, and benz(a)pyrene, and from 12 to 70% of these hydrocarbons were absorbed to suspended particles in the water. Radioauto graphs of particles after the addition of 3H-benz(a)pyrene and 3H-hexadecane to the water samples indicated the hydrocarbons associated with detrital particles. This detritus was composed of a mixture of clay, organic matter, plankton remains and living microbes. One area of the Cooper River had visible oil slicks and the degradation rates of added heptadecane (20 μg/l), naphthalene (30 μg/l) and methylnaphthalene (30 μg/l) were 0.4, 2.8 and 1.1 μg/I/day, respectively. In contrast, at a downstream site, where there were no visible slicks, the degradation rate of these same hydrocarbons were 0.1, 0.7 and 0.1 μg/l/day, respectively. Estuarine water had much higher hydrocarbon degradation rates than offshore and Gulf Stream waters.

scholarly journals ADDITIONAL RECORDS OF A NON-NATIVE FISH, THE SNOWY GROUPER, (Epinephelus niveatus) IN NOVA SCOTIAN WATERS

2007 ◽  
Vol 44 (1) ◽  
Author(s):  
Glyn Sharp ◽  
John Gilhen ◽  
Megan Veinot ◽  
Robert Semple
Keyword(s):  
Nova Scotia ◽  
Water Temperature ◽  
Gulf Stream ◽  
Artificial Reefs ◽  
Native Fish ◽  
Nova Scotian ◽  
Observation Period

At Clam Harbour, Nova Scotia in September 2005, two juvenile Snowy Groupers,Epinephelus niveatus (Valenciennes 1828), were captured. Subsequently, in October 2006 during the regular census of six artificial reefs in Sambro Harbour near Halifax, four juvenile Snowy Groupers were observed and one was captured. During the observation period the fish remained close to the reefs and fed voraciously. The arrival of the Snowy Groupers was correlated with the occurrence of a warm Gulf Stream tendril and their disappearance coincided with a drop in water temperature to 7.2°C.En septembre 2005, deux méroux neigeux juvéniles (Epinephelus niveatus– Valenciennes, 1828) ont été capturés à Clam Harbour (Nouvelle‑Écosse). En octobre 2006, quatre méroux neigeux juvéniles ont été observés et un autre capturé durant inventaire régulier de six récifs artificiels dans le havre Sambro près de Halifax. Durant la période d’observation, les poissons sont demeurés près des récifs et se nourrissaient avec voracité. L’arrivée et le départ des méroux neigeux ont coïncidé avec l’arrivée et le départ d’une masse d’eau chaude amenée par le Gulf Stream (la température de l’eau a chuté jusqu’à 7,2 °C une fois la masse d’eau chaude passée).

Temporary Migrations of Gulf Stream Water on the Atlantic Seaboard

1939 ◽  
Vol 4b (5) ◽  
pp. 339-348 ◽  
Author(s):  
H. B. Hachey
Keyword(s):  
Sea Level ◽  
Gulf Stream ◽  
Stream Water ◽  
Atlantic Coast ◽  
Inverse Correlation ◽  
Current Strength ◽  
Cold Wall ◽  
Northern Limit ◽  
Atlantic Seaboard ◽  
Stream Waters

Analyses of 161 thermograms from vessels on the Boston-Bermuda route illustrate temporary migrations of Gulf Stream water during 1932–1938. A northern limit of Gulf Stream waters, determined by the position of the "cold wall", on this route varies between latitudes 36°41′N. and 40°23′N. Average monthly positions of the northern limit indicate that more southerly positions follow the equinoxes. These mean monthly positions, plotted on a lagging scale, are inversely correlated with average monthly differences in sea level between Bermuda and Charleston, S.C., which inverse correlation indicates that the position of the northern limit is related to current strength, decrease in strength being followed by northerly migrations, and increase by southerly migrations. Hydrographic observations off the Canadian Atlantic coast offer some evidence of the influence of these migrations on the waters of this area.

Vertical mixing and elements of mesoscale dynamics over North Carolina shelf and contiguous Gulf Stream waters

2017 ◽  
Vol 67 (6) ◽  
pp. 783-798 ◽  
Author(s):  
Iossif Lozovatsky ◽  
Jesus Planella-Morato ◽  
Kipp Shearman ◽  
Qing Wang ◽  
Harindra Joseph S. Fernando
Keyword(s):  
North Carolina ◽  
Gulf Stream ◽  
Vertical Mixing ◽  
Mesoscale Dynamics ◽  
Stream Waters

Island in the Stream: Oceanography and Fisheries of the Charleston Bump

2001 ◽  
Keyword(s):  
Continental Slope ◽  
Gulf Stream ◽  
Topographic Feature ◽  
The Cross ◽  
Charleston Bump ◽  
Set Up ◽  
Stream Waters

<em>Abstract.</em>—The recurring seaward deflection of the Gulf Stream near 32°N latitude had been noticed by a number of investigators before the mid-1970s when Richard Legeckis first attributed the phenomenon to a topographic feature on the upper continental slope now known as the Charleston Bump. Since then, extensive studies have delineated many properties of the deflection and its effects on the Gulf Stream and surrounding waters including: the apparently bimodal nature of the deflection (resulting in the "strongly deflected" and "weakly deflected" states of the Gulf Stream's path near the Bump); the set up of the Charleston Gyre during strongly deflected conditions; the amplification of downstream-propagating Gulf Stream meanders in the Bump region; the meander-induced upwelling that accompanies meander propagation; and the cross-isobath exchange of shelf and Gulf Stream waters driven by the Charleston Gyre and Gulf Stream meanders. Of particular interest is the fact that there is still no unambiguous cause identified for inducing the Gulf Stream to shift from a weakly deflected path to a strongly deflected path, although several candidate mechanisms exist.

Distributional patterns of chaetognaths in the Bay of Fundy

1983 ◽  
Vol 61 (10) ◽  
pp. 2257-2265 ◽  
Author(s):  
P. C. F. Hurley ◽  
S. Corey ◽  
T. D. Iles
Keyword(s):  
Gulf Stream ◽  
Native Species ◽  
Abundant Species ◽  
High Abundance ◽  
Bay Of Fundy ◽  
Surface Circulation ◽  
Distributional Patterns ◽  
Hydrographic Conditions ◽  
Stream Waters ◽  
Very High

Nine species of chaetognaths were found in the Bay of Fundy: Sagitta elegans, S. tasmanica, Eukrohnia hamata, S. maxima, S. lyra, S. enflata, S. hexaptera, S. serratodentata, and Pterosagitta draco. Sagitta elegans was the dominant and only native species and maintained a centre of very high abundance in the study area. It is suggested that surface circulation carries young out of the Bay of Fundy and that the centre of abundance is maintained principally by immigration from outside the Bay and by interaction of adult specimens with the hydrographic conditions. Sagitta tasmanica was the second most abundant species and an immigrant carried into the Bay of Fundy by surface circulation. The distribution and abundance of E. hamata indicated a regular but variable inflow of slope water. The occurrence of S. maxima and S. lyra, and S. enflata, S. hexaptera, S. serratodentata, and P. draco indicated periodic inflow of oceanic boreal and (or) Gulf Stream waters.

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