Carr, M. Jet Propulsion Laboratory- California Institute of Technology,
Kearns, E. Rosenstiel School of Marine and Atmospheric Science- University of Miami,

Although the eastern boundary current regions cover only 1% of the world ocean, it is estimated that they account for a considerable proportion of global primary production and global fish catch. The areas associated with the Canary, Peru-Humboldt, California, and Benguela Currents are characterized by high productivity resulting from upwelling of cold, nutrient-rich waters in response to alongshore wind. These regions have shown rapid increases and precipitous declines in fish yield with repercussions beyond the economies of the fishing countries themselves. Here we utilize satellite measurements of wind forcing, of sea-surface temperature, and of pigment concentration to predict the fish productivity in each of the four eastern boundary current regions. An estimate of new production is made using historical data of nutrients and wind forcing, providing an upper bound for fish production. An alternative estimate is given by a numerical model of the planktonic ecosystem coupled to a two-dimensional scheme of alongshore flow. Another approach is given by the hypothesis of Lasker of critical first-feeding, in which larval survival depends critically on sustained low wind speeds for a period of order 4 days. This hypothesis is examined using satellite measurements of wind forcing and pigment concentration.
Day: Tuesday, Feb. 2
Time: 11:00 - 11:15am
Location: Sweeney Center
Code: SS43TU1100S