Davis Strait volume, freshwater and heat fluxes

Cuny, Jérôme; Rhines, Peter B.; Kwok, R.

doi:10.1016/j.dsr.2004.10.006

Cited by 152 publications

(172 citation statements)

References 29 publications

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“…noted that the total observed transport through the straits is not zero (Table 1). The residual is attributed to the interannual variability of the flow and to the large uncertainty of the measurements (Curry et al, 2010;Melling et al, 2008;Schauer et al, 2008). Bearing in mind the large uncertainty of the observations, we concluded that the simulations are in reasonable agreement with the observations.…”

supporting

confidence: 51%

Control of primary production in the Arctic by nutrients and light: insights from a high resolution ocean general circulation model

et al. 2010

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Abstract. Until recently, the Arctic Basin was generally considered to be a low productivity area and was afforded little attention in global-or even basin-scale ecosystem modelling studies. Due to anthropogenic climate change however, the sea ice cover of the Arctic Ocean is undergoing an unexpectedly fast retreat, exposing increasingly large areas of the basin to sunlight. As indicated by existing Arctic phenomena such as ice-edge blooms, this decline in sea-ice is liable to encourage pronounced growth of phytoplankton in summer and poses pressing questions concerning the future of Arctic ecosystems. It thus provides a strong impetus to modelling of this region.The Arctic Ocean is an area where plankton productivity is heavily influenced by physical factors. As these factors are strongly responding to climate change, we analyse here the results from simulations of the 1/4 • resolution global ocean NEMO (Nucleus for European Modelling of the Ocean) model coupled with the MEDUSA (Model for Ecosystem Dynamics, carbon Utilisation, Sequestration and Acidification) biogeochemical model, with a particular focus on the Arctic basin. Simulated productivity is consistent with the limited observations for the Arctic, with significant production occurring both under the sea-ice and at the thermocline, locations that are difficult to sample in the field.Results also indicate that a substantial fraction of the variability in Arctic primary production can be explained by two key physical factors: (i) the maximum penetration of winter mixing, which determines the amount of nutrients available for summer primary production, and (ii) short-wave radiation at the ocean surface, which controls the magnitude of phytoplankton blooms. A strong empirical correlation was Correspondence to: E. E. Popova (ekp@noc.soton.ac.uk) found in the model output between primary production and these two factors, highlighting the importance of physical processes in the Arctic Ocean.

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supporting

confidence: 51%

Control of primary production in the Arctic by nutrients and light: insights from a high resolution ocean general circulation model

et al. 2010

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“…Considering other indicators a salinity of 33 or even lower seems more reasonable. The transports through the different passages and of the different water masses for PSW salinities 33.0 and 33.2 are shown in Table 3 together with some observational estimates [Tang et al, 2004;Cuny et al, 2005;Münchow and Melling, 2008;Prinsenberg et al, 2009;Curry et al, 2011].…”

Section: A Barotropic Correctionmentioning

confidence: 99%

Volume and freshwater transports through the Canadian Arctic Archipelago–Baffin Bay system

Rudels

2011

J. Geophys. Res.

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[1] Baffin Bay connects the Arctic Ocean and the Labrador Sea. It receives Polar water through the Canadian Arctic Archipelago and by the West Greenland Current. The Polar water is, after transformation, exported through Davis Strait. With control sections both upstream and downstream Baffin Bay invites the use of an idealized geostrophic approach to estimate transports. The baroclinic transports, driven by the density differences between the Arctic Ocean and Baffin Bay, are first determined. The density and upper layer depth are assumed the same in Lancaster Sound, Nares Strait and the West Greenland Current. Once the baroclinic transports are estimated the sea level difference between the Arctic Ocean and Baffin Bay is computed. Next the upper layer depth in Nares Strait and the West Greenland Current is reduced, while the sea level difference is kept constant. This allows for deep inflows through Nares Strait and the West Greenland Current. To establish a deep outflow through Davis Strait a "barotropic" sea level slope between the Arctic Ocean and the Labrador Sea is estimated from two "ideal" water columns. The transports are computed for different salinities in the Polar water and the salinity giving mass balance in the deeper layers is determined. The effects of possible increased melting of the Greenland icecap are examined. If the meltwater is added directly to Baffin Bay the effects are small, but if it is incorporated in the East and West Greenland Current a significant reduction of the outflow through the Archipelago might occur.

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“…The Canadian Archipelago (sill depth 160 m) is the main gateway for the exit of Pacific Water (Steele et al, 2004) and for a fraction of Barents Sea water (Rudels et al, 2004). The net flow is between 2 and 3 Sv (Cuny et al, 2005). Any fraction from Fram Strait is probably small.…”

Section: A Stream Tube Concept For the West Spitsbergen Currentmentioning

confidence: 99%

“…Schauer (ursula.schauer@awi.de) latitudes -is evident (among many others: Schauer et al, 2004;Maslowski et al, 2004;Cuny et al, 2005). This makes it worthwhile to bring to mind once more the basic concepts which have been described in the oceanographic literature for more than thirty years (Montgomery, 1974;Hall and Bryden, 1982) and to illustrate the consequences of their violation in Sect.…”

Section: Introductionmentioning

confidence: 99%

Problems with estimation and interpretation of oceanic heat transport – conceptual remarks for the case of Fram Strait in the Arctic Ocean

Schauer

Beszczynska-Möller²

2009

Ocean Sci.

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Abstract. While the concept of oceanic heat transport -or rather heat transport divergence -is well known, it is sometimes applied inaccurately. Often so-called "heat transports" are computed across a partial section which means that the volume flow through such a section is not zero. In this case the "heat transports" depend entirely on the choice of the temperature scale. The consequences of such arbitrariness are demonstrated with a simple calculation exercise for the passages to the Arctic Ocean. To circumvent the arising difficulties for the Fram Strait in the Arctic we propose a stream tube concept to define a net zero volume flow section which can, with coarse assumptions, be used to determine oceanic heat transport by the portion of Atlantic water flow that passes through Fram Strait. Weaknesses of this approach and consequences for observational strategies are discussed.

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Davis Strait volume, freshwater and heat fluxes

Cited by 152 publications

References 29 publications

Control of primary production in the Arctic by nutrients and light: insights from a high resolution ocean general circulation model

Control of primary production in the Arctic by nutrients and light: insights from a high resolution ocean general circulation model

Volume and freshwater transports through the Canadian Arctic Archipelago–Baffin Bay system

Problems with estimation and interpretation of oceanic heat transport – conceptual remarks for the case of Fram Strait in the Arctic Ocean

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