07/24/2013 - 3:30pm to 4:30pm
Jennifer Ayers (Institute for Marine and Antarctic Studies, University of Tasmania, Australia)
Horizontal nutrient transport and its implications for primary production and climate
A long-standing paradigm in oceanography, and one the community has been reluctant to let go for its simplicity, is that nutrients are supplied to surface waters from below. However, there’s an increasing awareness of the importance of horizontal advection in regional nutrient budgets. This talk will examine three different case studies of horizontal nutrient transport: (1) the horizontal Ekman supply of nitrate to the North Pacific Transition Zone, (2) the role of geostrophic advection in maintaining the North Pacific carbon dioxide sink, and (3) the wind-driven overturning circulation as a driver of Subantarctic Mode Water nutrient variability. In these cases, the horizontal advection of biogeochemical signals ultimately exerts significant control on climate drivers, including primary production and air-sea CO2 exchange.
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101 Nierenberg Hall