The East Greenland Current North of Denmark Strait: Part I

Aagaard, Knut; Coachman, L. K.

doi:10.14430/arctic3262

Cited by 87 publications

(74 citation statements)

References 13 publications

(4 reference statements)

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“…In Northeast Greenland, the Atlantic water is supplied by the East Greenland Current. This Atlantic water is derived from the West Spitsbergen Current that sets northward along the west coast of Spitsbergen and water from the Atlantic layer of the Arctic Ocean [e.g., Aagaard and Coachman, 1968;Mauritzen, 1996]. The relatively warm (0-2 °C) Atlantic water resides at ~150-800 m depth forming a layer below the Polar water [Rudels et al, 2002].…”

Section: Discussionmentioning

confidence: 99%

Polynya impacts on water properties in a Northeast Greenland fjord

Dmitrenko

Kirillov

Rysgaard

et al. 2015

Estuarine, Coastal and Shelf Science

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Section: Discussionmentioning

confidence: 99%

Polynya impacts on water properties in a Northeast Greenland fjord

Dmitrenko

Kirillov

Rysgaard

et al. 2015

Estuarine, Coastal and Shelf Science

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“…The sea ice dynamics of Baffin Bay and East Greenland (figure 1) differ and are described in detail by Valeur et al [21], Tang et al [22] and Aagaard & Coachman [23]. In Baffin Bay, sea ice is seasonal and the region is almost ice-free in summer.…”

Section: Materials and Methods (A) Baffin Bay And East Greenland Polarmentioning

confidence: 99%

Females roam while males patrol: divergence in breeding season movements of pack-ice polar bears ( Ursus maritimus )

et al. 2013

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Intraspecific differences in movement behaviour reflect different tactics used by individuals or sexes to favour strategies that maximize fitness. We report movement data collected from n ¼ 23 adult male polar bears with novel ear-attached transmitters in two separate pack ice subpopulations over five breeding seasons. We compared movements with n ¼ 26 concurrently tagged adult females, and analysed velocities, movement tortuosity, range sizes and habitat selection with respect to sex, reproductive status and body mass. There were no differences in 4-day displacements or sea ice habitat selection for sex or population. By contrast, adult females in all years and both populations had significantly more linear movements and significantly larger breeding range sizes than males. We hypothesized that differences were related to encounter rates, and used observed movement metrics to parametrize a simulation model of male-male and malefemale encounter. The simulation showed that the more tortuous movement of males leads to significantly longer times to male-male encounter, while having little impact on male-female encounter. By contrast, linear movements of females are consistent with a prioritized search for sparsely distributed prey. These results suggest a possible mechanism for explaining the smaller breeding range sizes of some solitary male carnivores compared to females.

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“…Aagaard and Coachman, 1968;Foldvik et al, 1988;Marnela et al, 2013). However, nothing is known about the circulation over the Wandel Sea shelf, which is covered with multiyear and firstyear landfast sea ice almost year-round.…”

Section: Regional Oceanographic Settings Of the Southern Wandel Sea Smentioning

confidence: 99%

Storm-induced water dynamics and thermohaline structure at the tidewater Flade Isblink Glacier outlet to the Wandel Sea (NE Greenland)

et al. 2017

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Abstract. In April 2015, an ice-tethered conductivitytemperature-depth (CTD) profiler and a down-looking acoustic Doppler current profiler (ADCP) were deployed from the landfast ice near the tidewater glacier terminus of the Flade Isblink Glacier in the Wandel Sea, NE Greenland. The 3-week time series showed that water dynamics and the thermohaline structure were modified considerably during a storm event on 22-24 April, when northerly winds exceeded 15 m s −1 . The storm initiated downwellinglike water dynamics characterized by on-shore water transport in the surface (0-40 m) layer and compensating offshore flow at intermediate depths. After the storm, currents reversed in both layers, and the relaxation phase of downwelling lasted ∼ 4 days. Although current velocities did not exceed 5 cm s −1 , the enhanced circulation during the storm caused cold turbid intrusions at 75-95 m depth, which are likely attributable to subglacial water from the Flade Isblink Ice Cap. It was also found that the semidiurnal periodicities in the temperature and salinity time series were associated with the lunar semidiurnal tidal flow. The vertical structure of tidal currents corresponded to the first baroclinic mode of the internal tide with a velocity minimum at ∼ 40 m. The tidal ellipses rotate in opposite directions above and below this depth and cause a divergence of tidal flow, which was observed to induce semidiurnal internal waves of about 3 m height at the front of the glacier terminus.Our findings provide evidence that shelf-basin interaction and tidal forcing can potentially modify coastal Wandel Sea waters even though they are isolated from the atmosphere by landfast sea ice almost year-round. The northerly storms over the continental slope cause an enhanced circulation facilitating a release of cold and turbid subglacial water to the shelf. The tidal flow may contribute to the removal of such water from the glacial terminus.

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The East Greenland Current North of Denmark Strait: Part I

Cited by 87 publications

References 13 publications

Polynya impacts on water properties in a Northeast Greenland fjord

Polynya impacts on water properties in a Northeast Greenland fjord

Females roam while males patrol: divergence in breeding season movements of pack-ice polar bears ( Ursus maritimus )

Storm-induced water dynamics and thermohaline structure at the tidewater Flade Isblink Glacier outlet to the Wandel Sea (NE Greenland)

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