An overview of physical processes in the North Water

The presence of a polynya strongly affects biological processes by influencing underwater light levels, water-column stratification, the upwelling of nutrients, and the timing of production cycles. An overview of the existing literature on the oceanography, meteorology and sea-ice conditions of the North Water, a large recurring polynya in northern Baffin Bay, is presented. The North Water is influenced by a cold inflow of Arctic Ocean water from the north and, in some areas, a warmer inflow of Atlantic water from the south. Earlier observations and modeling studies suggested that both wind and ocean advection of sea ice, as well as heat input to the surface waters by either upwelling or mixing, were responsible for the formation and maintenance of the polynya. Recent data indicate the North Water to be primarily generated by the southward drift of ice by winds and currents, as opposed to melting ice by sensible heat input over large areas. Localized sensible heat effects occur in fall, winter and spring along the Greenland side of the polynya.

[1]  David G. Barber,et al.  On the estimation of spring melt in the North Water polynya using RADARSAT‐1 , 2001 .

[2]  H. Melling,et al.  Ocean circulation within the North Water polynya of Baffin Bay , 2001 .

[3]  E. Carmack,et al.  Impact of the large‐scale Arctic circulation and the North Water Polynya on nutrient inventories in Baffin Bay , 2002 .

[4]  M. Maqueda,et al.  A Model for the Influence of Wind and Oceanic Currents on the Size of a Steady-State Latent Heat Coastal Polynya , 1997 .

[5]  J. Maxwell.  Climatic Regions of the Canadian Arctic Islands , 1981 .

[6]  R. Macdonald,et al.  Physical and geochemical properties across the Atlantic/Pacific water mass front in the southern Canadian Basin , 1996 .

[7]  Stuart D. Smith,et al.  Polynyas and leads: An overview of physical processes and environment , 1990 .

[8]  F. Huang,et al.  A latent- and sensible-heat polynya model for the North Water, Northern Baffin Bay , 1992 .

[9]  N. Biggs,et al.  A steady-state coupled ocean-polynya flux model of the North Water, Baffin Bay , 2001 .

[10]  K. Steffen,et al.  Technical note Surface temperatures and sea ice typing for northern Baffin Bay , 1988 .

[11]  K. Steffen,et al.  Heat exchange and surface conditions in North Water, northern Baffin Bay , 1985 .

[12]  David G. Barber,et al.  On the relationship between spatial patterns of sea‐ice type and the mechanisms which create and maintain the North Water (NOW) polynya , 2001 .

[13]  R. Bourke,et al.  Formation of Baffin Bay Bottom and Deep Waters , 1991 .

[14]  B. Dey.  Applications of Satellite Thermal Infrared Images for Monitoring North Water during the Periods of Polar Darkness , 1980, Journal of Glaciology.

[15]  L. Legendre,et al.  Springtime sensible heat, nutrients and phytoplankton in the Northwater Polynya, Canadian Arctic , 1996 .

[16]  L. Mysak,et al.  Modeling Sea Ice as a Granular Material, Including the Dilatancy Effect , 1997 .

[17]  R. Stewart,et al.  Winter storms over Canada , 1995 .

[18]  David G. Barber,et al.  Sea‐ice and meteorological conditions in Northern Baffin Bay and the North Water polynya between 1979 and 1996 , 2001 .

[19]  Konrad Steffen,et al.  Ice Conditions of an Arctic Polynya: North Water in Winter , 1986, Journal of Glaciology.

[20]  D. Lemon,et al.  Seasonal Variations in Currents and Water Properties in Northwestern Baffin Bay, 1978-1979 , 1982 .

[21]  I. Stirling,et al.  Polynyas in the Canadian Arctic , 1981 .

[22]  Moira Dunbar,et al.  The Geographical Position of the North Water , 1969 .

[23]  K. Steffen.  Warm water cells in the North Water, Northern Baffin Bay during winter , 1985 .

[24]  C. Pease,et al.  The size of wind‐driven coastal polynyas , 1987 .

[25]  L. Mysak,et al.  A Nonlinear Steady-State Model of the North Water Polynya, Baffin Bay , 1994 .

[26]  Victor C Addison.  The physical oceanography of the northern Baffin Bay-Nares Strait region / , 1987 .

[27]  M. Maqueda,et al.  A Two-Dimensional Time-Dependent Model of a Wind-Driven Coastal Polynya: Application to the St. Lawrence Island Polynya , 2000 .

[28]  M. Maqueda,et al.  Polynya flux model solutions incorporating a parameterization for the collection thickness of consolidated new ice , 2000, Journal of Fluid Mechanics.

[29]  P Lemke.  Open Windows to the Polar Oceans , 2001, Science.

[30]  D. King,et al.  Validation and production of RADARSAT‐1 derived ice‐motion maps in the North Water (NOW) polynya, January ‐ December 1998 , 2001 .

[31]  E. Carmack,et al.  Water column structure and circulation under the North Water during spring transition: April July 1998 , 2002 .