Year: 2010
Type: conference-paper
Abstract: Oxygen Minimum ZonesOxygen supply along isopycnal surfaces, in general weak diapycnal mixing.Oxygen consumption via heterotrophic respiration. Oxygen Depletion in the North Atlantic OMZOxygen data show a reduction of dissolved oxygen in the North Atlantic OMZ over the last 40 years -stronger than in all other tropical regions.Ventilated Thermocline Transport processes at the boundary between ventilated and unventilated thermocline: advection (solid arrow) and diffusive flux (open arrow) Latitudinally Alternating Zonal Jets in the Tropical Atlantic Mean zonal velocity from deep drifting floats at 800 and 1000 m depth.Equatorial Deep Jets Equatorial deep jets or stacked jets are characterized by high baroclinic modes (mode 13-19).Jets exchange passive tracer between western boundary regime and eastern equatorial Atlantic.Questions to be Addressed How is the North Atlantic OMZ ventilated?How do zonal jets of small vertical or meridional scale contribute to the ventilation?Are there long-term changes in hydrography and/or zonal flow field associated with changes in the oxygen distribution?We will use shipboard hydrographic and current sections taken along 23°W between 1999-2008, equatorial current meter moorings at 23°W deployed since 2002 as well as hydrographic profiles obtained between 1972-1985.
Author: Peter Brandt
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Life below water
Open Access status: green
OpenAlex ID: W99605899