Historical and recent evidence of Scotian Shelf Water on southern Georges Bank

Bisagni, James J.; Beardsley, Robert C.; Ruhsam, Cynthia M.; Manning, James P.; Williams, William J.

doi:10.1016/s0967-0645(96)00041-0

Cited by 54 publications

(48 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model, however, predicts that the shallow central region of the Bank will be recolonised as rapidly as the NE peak, something we did not see any evidence for based on the C, finn~archicus abundance at Stns 2 and 4 ( Table 2). Filaments of Scotian Shelf surface water have been observed to jump across the NE Channel onto the NE peak (Flagg 1987, Bisagni et al 1996. We saw evidence of cold, low salinity Scotian Shelf water at the surface in the GOM (Stn 7) during January but not on GB, suggesting that this was not an important source region.…”

Section: Egg Laying and Reproductive Index (Ri)mentioning

confidence: 78%

Late fall-early winter recruitment of Calanus finmarchicus on Georges Bank

Durbin¹,

Ja²,

Rg³

et al. 1997

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

both regions was present as C5, with a small proportion of C4 and females There were vely few anlmals on GB. In the southern GOM about a third of the C. finmarchicus population was In the upper 80 m and actively feeding; the rerna~nder were below 120 m. On GB the C. fjnmarch~cus population was also feeding; gut p~glnent content in both areas was between 3 and 13 ng copepod-'. About one thlrd of the adult females on GB were reproductively a c t~v e ivh~le none in the GOM were reproductlvely active. By January C. finmarchicus C6 females formed a large proportion of the older stage a n~m a l s on the Bank and in surface waters of the southern GOM These were actively f e e d~n g and reproducing with a large cohort of young nauplii of C, finmarch~cus present in the southern GOM and smaller numbers on the northeast peak of the Bank. There were very few C. finmarchicus nauplii on the crest of the Bank or on the southern flank. Based on abundances and stage composition, it appeared that spawning began in late December and that repopulation of the Bank took place in the region of the NE peak, with nauplii and reproductlvely active females being transported onto this region of the Bank from the GOM.

show abstract

Section: Egg Laying and Reproductive Index (Ri)mentioning

confidence: 78%

Late fall-early winter recruitment of Calanus finmarchicus on Georges Bank

Durbin¹,

Ja²,

Rg³

et al. 1997

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Stations with unusually low integrated water column temperatures were found to have low salinities also. The temperature profiles at these stations were examined and it was noted that the low temperatures and salinities were restricted to the upper 10 to 15 m, suggesting incursions of Scotian Shelf water, as described in Bisagni et al (1996). These stations were considered non-representative of the average growing conditions for larvae on Georges Bank and larvae from these samples, which may have been advected into the area, were not included in the analysis.…”

Section: Methodsmentioning

confidence: 99%

Age and growth of larval cod and haddock on Georges Bank during 1995 and 1996

Green

Jones²,

Brownell³

2004

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…For background, it is important to review the types of water masses (Figure 16) that are likely to be observed at these sites, and what their properties might be (http://www.mar.dfo-mpo.gc.ca/science/ocean/scotia/ssmap.html provides an excellent climatology). The freshest, coldest water at any time of the year is associated with "cross-over" events from the Scotian Shelf: temperatures lower (<5 ºC in winter and < 8 ºC in summer) than those found on Georges Bank and salinities of 32 or less (Bisagni et al, 1996). Another fresh end member found on the Bank during the summertime is that associated with the western Gulf of Maine (to be identified with the "Maine Surface Water" of Hopkins and Garfield, 1979): these waters have been warmed at the surface, but are still quite fresh due to their Scotian Shelf origin and to the further addition of Gulf of Maine river runoff.…”

Section: Introductionmentioning

confidence: 99%

Long-term moored array measurements of currents and hydrography over Georges Bank: 1994–1999

Brink

Beardsley

Limeburner

et al. 2009

Progress in Oceanography

Self Cite

View full text Add to dashboard Cite

Abstract:In conjunction with the GLOBEC (Global Ocean Ecosystems Dynamics) program, measurements of moored currents, temperature and salinity were made during 1994-1999 at locations in 76 m of water along the Southern Flank of Georges Bank and at the Northeastern Peak. The measurements concentrate on the biologically crucial winter and spring periods, and coverage during the fall is usually poorer.Current time series were completely dominated by the semidiurnal M 2 tidal component, while other tidal species (including the diurnal K 1 component) were also important. There was a substantial wind-driven component of the flow, which was linked, especially during the summer, to regional-scale response patterns. The current response at the Northeast Peak was especially strong in the 3-4 day period band, and this response is shown to be related to an amplifying topographic wave propagating eastward along the northern flank. Monthly mean flows on the southern flank are southwestward throughout the year, but strongest in the summertime. The observed tendency for summertime maximum along-bank flow to occur at depth is rationalized in terms of density gradients associated with a near-surface freshwater tongue wrapping around the Bank.Temperature and salinity time series demonstrate the presence, altogether about 25% of the time, of a number of intruding water masses. These intrusions could last anywhere from a couple days up to about a month. The sources of these intrusions can be broadly classified as the Scotian Shelf (especially during the winter), the Western Gulf of Maine (especially during the summer), and the deeper ocean south of Georges Bank (throughout the year). On longer time scales, the temperature variability is dominated by seasonal temperature changes. During the spring and summer, these changes are balanced by local heating or cooling, but wintertime cooling involves advective lateral transports as well. Salinity variations have weak, if any, seasonal variability, but are dominated by interannual changes that are related to regional-or basin-scale changes.All considered, Georges Bank temperature and salinity characteristics are found to be highly dependent on the surrounding waters, but many questions remain, especially in terms of whether intrusive events leave a sustained impact on Bank waters.Regional Index Terms: Northeast US shelf; Gulf of Maine; Georges Bank

show abstract

Historical and recent evidence of Scotian Shelf Water on southern Georges Bank

Cited by 54 publications

References 47 publications

Late fall-early winter recruitment of Calanus finmarchicus on Georges Bank

Late fall-early winter recruitment of Calanus finmarchicus on Georges Bank

Age and growth of larval cod and haddock on Georges Bank during 1995 and 1996

Long-term moored array measurements of currents and hydrography over Georges Bank: 1994–1999

Contact Info

Product

Resources

About