MacCready, P. University of Washington, parker@ocean.washington.edu
Quay, P. University of Washington, pdquay@u.washington.edu
Westby, T. University of Washington, westby@u.washington.edu

 
THE EFFECTS OF CIRCULATION AND PRODUCTIVITY ON NUTRIENTS AND THE 13C/12C OF DIC IN SURFACE WATERS OF THE SOUTHERN OCEAN
 
The effects that circulation, productivity and air-sea gas exchange have on the meridional distribution of surface nutrients and CO2 in the Southern Ocean is examined using a simple 2-D circulation model of the surface layer. The diagnostic model includes the meridional and seasonal variability of mixed layer depth and wind stress. The rate of incorporation of subsurface water into the surface layer is constrained by heat and freshwater budgets. The seasonal and meridional distribution of nutrients is simulated by the model and used to constrain the rate of organic matter export from the surface layer. Measurements of the seasonal and meridional variability of the 13C/12C of the dissolved inorganic carbon (DIC) in the southern ocean during the AESOPS cruises are presented. These 13C/12C-DIC measurements are used to estimate the effects of air-sea exchange and biological carbon export on surface CO2 levels.
 
Day: Wednesday, Feb. 3
Time: 02:15 - 02:30pm
Location: Sweeney Center
 
Code: SS31WE0215S