Seasonality of the inshore Labrador current over the Newfoundland shelf

Wang, Zeliang; Yashayaev, Igor; Greenan, B. J. W.

doi:10.1016/j.csr.2015.03.010

Cited by 19 publications

(20 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cold water advected by the Labrador Current has major impacts on the Canadian east coast SST, including the entire Grand Banks region during all seasons. The smaller inshore branch that flows along the Newfoundland coast is more visible in the summer and fall seasons, corresponding to times when its velocities are higher (Wang et al 2015). In the summer, waters observed along the Labrador and Newfoundland coastlines are warmer than those further offshore.…”

Section: Eastern Canadamentioning

confidence: 91%

See 1 more Smart Citation

Canadian Coastal Seas and Great Lakes Sea Surface Temperature Climatology and Recent Trends

Larouche

Galbraith

2016

Canadian Journal of Remote Sensing

View full text Add to dashboard Cite

28 years of satellite data were used to calculate sea surface temperature (SST) climatologies covering Canada's 3 surrounding oceans and the Great Lakes. Results show the imprint of major circulation features on the spatial distribution of the SST. Together with the Gulf Stream, the Labrador Current generates a strong spatial variability of SST on the east coast. Most of the Canadian Arctic, with the exception of Hudson Bay and the coastal Beaufort Sea region, is characterized by very small seasonal SST amplitude. Lake Erie is the water body having the largest seasonal SST amplitude, but for the oceanic regions, it is the southern Gulf of St. Lawrence and the adjacent Scotian Shelf. A trend analysis showed that many regions are undergoing rapid warming of the sea surface. However, warming is not spatially uniform. The strongest warming was detected in Baffin Bay and appears to result from the decreasing ice cover. Lake Superior is also showing a strong warming trend. These results have important implications for fisheries management because SST affects many species. Regions with small yearly amplitudes and warming trends might act as future cool water oases for some species. Résumé. 28 années de données satellitaires ontété utilisées afin de calculer des climatologies des températures de surface de la mer «sea surface temperature» (SST) pour les 3 océans entourant le Canada ainsi que pour les Grands Lacs. Les résultats montrent l'empreinte des principaux courants océaniques sur la distribution spatiale des SST. Avec le Gulf Stream, le courant duLabrador génère une forte variabilité spatiale des SST sur la côte est. La plupart de l'arctique canadien, avec l'exception de la Baie d'Hudson et la zone côtière de la mer de Beaufort, est caractérisé par une très faible amplitude annuelle des SST. Le lacÉrié est la masse d'eau montrant la plus grande amplitude saisonnière, mais pour les régions océaniques, ce sont le sud du Golfe du Saint-Laurent et le plateau Néo-Écossais adjacent. Une analyse de tendances a montré que plusieurs régions sont soumisesà un accroissement rapide des températures de surface. Toutefois, le réchauffement n'est pas spatialement uniforme. Le plus fort réchauffement aété détecté dans la baie de Baffin et semble reliéà la décroissance de la couverture de glace. Le lac Supérieur montre aussi une forte tendance au réchauffement. Ces résultats ont d'importantes implications pour la gestion des pêches puisque la SST affecte plusieurs espèces. Les régions ayant une faible amplitude annuelle et un faible taux de réchauffement pourraient agir dans le futur comme des oasis froides pour certaines espèces.

show abstract

Section: Eastern Canadamentioning

confidence: 91%

“…The main core of the Labrador Current flows along the shelf edge, but a smaller inshore branch also exists (Lazier and Wright 1993;Wang et al 2015). The cold water advected by the Labrador Current has major impacts on the Canadian east coast SST, including the entire Grand Banks region during all seasons.…”

Section: Eastern Canadamentioning

confidence: 99%

Canadian Coastal Seas and Great Lakes Sea Surface Temperature Climatology and Recent Trends

Larouche

Galbraith

2016

Canadian Journal of Remote Sensing

View full text Add to dashboard Cite

show abstract

“…Wang et al . [b] used this approach to investigate the seasonality of inshore‐Labrador Current. The governing equation is:

- \frac{f V}{g H} = - \frac{\partial ξ}{\partial x} - \int_{- H}^{0} (1 + \frac{z}{H}) \frac{\partial ε}{\partial x} d z + \frac{τ_{x s} - τ_{x b}}{ρ_{o} g H}

…”

Section: Roles Of Forcing In the Changes In The Labrador Current Systemmentioning

confidence: 99%

“…The depth-integrated momentum equations [Csanady, 1979] are employed to investigate transport variability contributed by sea level and density gradients, and also by local bottom and surface stress for the WLC and ELC. Wang et al [2015b] used this approach to investigate the seasonality of inshore-Labrador Current. The governing equation is:…”

Section: 1002/2016jc011721mentioning

confidence: 99%

An abrupt shift in the Labrador Current System in relation to winter NAO events

et al. 2016

Self Cite

View full text Add to dashboard Cite

The behavior of the Labrador Current during the period from 1990 to 2007 is investigated with an eddy‐resolving circulation model for the North Atlantic Ocean. An EOF analysis of the model output suggests that the variability in the Labrador Current can be partitioned into a western Labrador Current (WLC; from the 300–2500 m isobaths), and an eastern Labrador Current (ELC; from the 2500 to 3300 m isobaths). The model results demonstrate that the WLC transport experienced an abrupt increase during 2000–2002, consistent with data. This differed significantly from the ELC transport which was strong during the high winter NAO (North Atlantic Oscillation) years (1990–1995) and then steadily declined. This ELC trend is consistent with changes in the modeled Atlantic Meridional Overturning Circulation and convection depth. Our study proposes that the change in the WLC is due to a southwestward shift of the atmospheric circulation pattern starting in 2001, coincident with a change in the 2001 NAO index, and also in a westward shift of the action centers of the winter NAO events.

show abstract

“…Adult males are estimated to occupy primarily coastal waters off Georges Bank that are more directly influenced by the cold, inshore Labrador Current coming from the Arctic Ocean and the Newfoundland shelf, which has its highest flow and strength in the fall/winter (Wang et al 2015), compared to the warmer, more southerly coastal waters occupied by females. Specifically, in the spring, both adult males and females are predicted in higher abundances inside major estuaries and bays and inshore coastal waters across the study area.…”

Section: Discussionmentioning

confidence: 95%

A Hierarchical Bayesian Modeling Approach for the Habitat Distribution of Smooth Dogfish by Sex and Season in Inshore Coastal Waters of the U.S. Northwest Atlantic

et al. 2018

View full text Add to dashboard Cite

The Smooth Dogfish Mustelus canis is an abundant, small coastal shark occurring along the U.S. Atlantic coast. Despite being targeted by a directed fishery and having recently undergone a stock assessment that found the population neither overfished nor experiencing overfishing, little is known about the spatial and temporal distribution of this species. Here, we used catch data from the spring and fall Northeast Area Monitoring and Assessment Program's fishery‐independent trawl surveys conducted between 2007 and 2016 and various environmental factors to perform hierarchical Bayesian modeling as a first attempt to spatially predict adult Smooth Dogfish CPUE in U.S. northwest Atlantic Ocean waters by sex and season. Relevant environmental variables differed between both sexes and seasons. Male and female CPUEs were similarly associated with lower salinity and shallower depth in the spring. During fall, male CPUE was associated with sea surface temperature and bottom rugosity, and female CPUE was associated with chlorophyll‐a concentration, bottom rugosity, and year. Habitat modeling results predicted that areas of high male and female CPUEs would overlap during spring but strongly diverge during fall, when greater predicted CPUEs for males were distributed considerably farther north. These results suggest sexual segregation among Smooth Dogfish during fall, with the springtime overlap in distribution coinciding with the pupping and mating season in this population. This difference in distribution during fall may allow for a male‐only directed fishery for Smooth Dogfish in the northern extent of the species’ range in waters near southern New England and Georges Bank.

show abstract

Seasonality of the inshore Labrador current over the Newfoundland shelf

Cited by 19 publications

References 23 publications

Canadian Coastal Seas and Great Lakes Sea Surface Temperature Climatology and Recent Trends

Canadian Coastal Seas and Great Lakes Sea Surface Temperature Climatology and Recent Trends

An abrupt shift in the Labrador Current System in relation to winter NAO events

A Hierarchical Bayesian Modeling Approach for the Habitat Distribution of Smooth Dogfish by Sex and Season in Inshore Coastal Waters of the U.S. Northwest Atlantic

Contact Info

Product

Resources

About