The outflow from Hudson Strait and its contribution to the Labrador Current

Straneo, Fiammetta; Saucier, François J.

doi:10.1016/j.dsr.2008.03.012

Cited by 94 publications

(126 citation statements)

References 24 publications

(43 reference statements)

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“…Some of its water enter Hudson Strait where it is mixed with the outflow from Hudson Bay before becoming part of the Labrador Current. This Arctic water, though modified during its southward transit by local ice formation and melting, outflow from and tidal mixing within Hudson Strait [Straneo and Saucier, 2008], and mixing with the saltier slope waters, still retains evidence of its Arctic (and Pacific) origin .…”

Section: Methodsmentioning

confidence: 99%

“…The DIC and TA concentrations were 2169 ± 14 and 2236 ± 11 mmol/kg with a high fCO 2 of 540 matm. This deep layer slowly flows into the Labrador Sea [Straneo and Saucier, 2008]. The aragonite saturation horizon in the southern part of the section is at ∼200 m (Figure 7).…”

Section: Davis Strait and Hudson Straitmentioning

confidence: 99%

“…[30] The hydrography and currents in the Hudson Strait have been studied by Straneo and Saucier [2008]. Our samples were collected on their 2005 section across the strait.…”

Section: Davis Strait and Hudson Straitmentioning

confidence: 99%

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Calcium carbonate saturation states in the waters of the Canadian Arctic Archipelago and the Labrador Sea

Azetsu-Scott¹,

Clarke²,

Falkner³

et al. 2010

J. Geophys. Res.

118

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Ocean acidification is predicted to occur first in polar oceans. We investigated the saturation state of waters with respect to calcite (Ωcal) and aragonite (Ωarg) in six sections along an Arctic outflow pathway through the Canadian Arctic Archipelago (CAA) and into the northwestern Atlantic using dissolved inorganic carbon and total alkalinity measurements from 2003 to 2005. The study area, a key region connecting the Arctic and the North Atlantic, includes Smith Sound, Barrow Strait, Baffin Bay, Davis Strait, Hudson Strait, and the Labrador Sea. The average Ωarg in the Arctic outflow was 1.18 ± 0.17 in Barrow Strait and 1.31 ± 0.14 in Smith Sound, with areas where Ωarg < 1. The Arctic outflow through the CAA has a high content of Pacific waters, which have a low saturation state. These waters can be traced along the western Baffin Bay to Davis Strait. South of Davis Strait, this outflow is modified by mixing with slope and offshore waters of Atlantic origin and with the outflow from Hudson Strait. Despite the mixing, low saturation state water can still be identified on the southern Labrador Shelf. The aragonite saturation horizon is found at ∼150 m in Barrow Strait; at 200 m in Baffin Bay, Davis Strait, and Hudson Strait; and at 2300 m in the Labrador Sea. This study provides baseline data of the saturation states for the waters of the CAA and the northwest Atlantic. It also illustrates the downstream evolution of low saturation state Arctic outflow in the northwest Atlantic.

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Section: Methodsmentioning

confidence: 99%

Section: Davis Strait and Hudson Straitmentioning

confidence: 99%

See 1 more Smart Citation

Calcium carbonate saturation states in the waters of the Canadian Arctic Archipelago and the Labrador Sea

Azetsu-Scott¹,

Clarke²,

Falkner³

et al. 2010

J. Geophys. Res.

118

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“…The mooring had only one CTD located close to the surface (at 30 m depth). Investigations have shown that the particularly strong currents found there caused a significant and irregular tilt of the mooring line [e.g., Straneo and Saucier, 2008]. Also, the seasonal variations of the phase of M 2 at station 25 are not Table 2 are indicated as black stars.…”

Section: Observationsmentioning

confidence: 99%

On the modification of tides in a seasonally ice‐covered sea

2008

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[1] New observations from eight moorings located in Foxe Basin, Hudson Strait, and Hudson Bay are used to study the seasonal variability of the M 2 tide. Significant seasonal variations of the M 2 surface elevation are found in all these regions and at all seasons. The largest variations occur during winter while both elevation increase (Hudson Strait) and decrease (Hudson Bay, Foxe Basin) are observed. These variations are found recurrent at the stations where multiyear observations are available. Observations from a velocity profiler are consistent with a seasonal damping of the tides because of friction under ice. Numerical simulations with a sea ice-ocean coupled model and realistic forcing qualitatively reproduce most of the features of the observed variability. The simulations show that the winter M 2 variations are essentially caused by the under-ice friction, albeit with strong regional differences. Under-ice friction mostly occurs in a limited region (Foxe Basin) and can account for both increased and decreased M 2 elevations during winter.

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“…Since sound speed depends more on temperature than salinity in polar waters, a simple thermistor chain or a winched CTD system such as the WHOI Arctic Winch (Straneo and Saucier, 2007;Pickart, 2007) could provide an improved sound speed correction. The latter can provide coverage throughout the upper water column and also avoid damage due to deep ice keels or ice bergs.…”

Section: Recommendations For Future Deploymentsmentioning

confidence: 99%

Estimating sea-ice coverage, draft, and velocity in Marguerite Bay (Antarctica) using a subsurface moored upward-looking acoustic Doppler current profiler (ADCP)

Hyatt

Visbeck

Beardsley

et al. 2008

Deep Sea Research Part II: Topical Studies in Oceanography

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A technique for the analysis of data from a subsurface moored upward-looking acoustic Doppler current profiler (ADCP) to determine ice coverage, draft and velocity is presented and applied to data collected in Marguerite Bay on the western Antarctic Peninsula shelf. This method provides sea ice information when no dedicated upward-looking sonar (ULS) data is available. Ice detection is accomplished using windowed variances of ADCP vertical velocity, vertical error velocity, and surface horizontal speed. ADCP signal correlation and backscatter intensity were poor indicators of the presence of ice at this site. Ice draft is estimated using a combination of ADCP backscatter data, atmospheric and oceanic pressure data, and information about the thermal stratification. This estimate requires corrections to the ADCP-derived range for instrument tilt and sound speed profile. Uncertainties of ± 0.20 m during midwinter and ± 0.40 m when the base of the surface mixed layer is above the ADCP for ice draft are estimated based on (a) a Monte Carlo simulation, (b) uncertainty in the sound speed correction, and (c) performance of the zero-draft estimate during times of known open water. Ice velocity is taken as the ADCP horizontal velocity in the depth bin specified by the range estimate.

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The outflow from Hudson Strait and its contribution to the Labrador Current

Cited by 94 publications

References 24 publications

Calcium carbonate saturation states in the waters of the Canadian Arctic Archipelago and the Labrador Sea

Calcium carbonate saturation states in the waters of the Canadian Arctic Archipelago and the Labrador Sea

On the modification of tides in a seasonally ice‐covered sea

Estimating sea-ice coverage, draft, and velocity in Marguerite Bay (Antarctica) using a subsurface moored upward-looking acoustic Doppler current profiler (ADCP)

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