Mesoscale Circulation and Primary Production in Eastern Boundary Current Systems

1997 ◽  
Author(s):  
Thomas L. Hayward
Keyword(s):  
Primary Production ◽  
Mesoscale Circulation ◽  
Boundary Current ◽  
Eastern Boundary ◽  
Eastern Boundary Current ◽  
Current Systems

Climate change and wind intensification in coastal upwelling ecosystems

Science ◽  
2014 ◽  
Vol 345 (6192) ◽  
pp. 77-80 ◽  
Author(s):  
W. J. Sydeman ◽  
M. García-Reyes ◽  
D. S. Schoeman ◽  
R. R. Rykaczewski ◽  
S. A. Thompson ◽  
...  
Keyword(s):  
Climate Change ◽  
Coastal Upwelling ◽  
Meta Analysis ◽  
Boundary Current ◽  
Eastern Boundary ◽  
Warming Pattern ◽  
Eastern Boundary Current ◽  
Coastal Winds ◽  
Variable Support ◽  
Current Systems

In 1990, Andrew Bakun proposed that increasing greenhouse gas concentrations would force intensification of upwelling-favorable winds in eastern boundary current systems that contribute substantial services to society. Because there is considerable disagreement about whether contemporary wind trends support Bakun’s hypothesis, we performed a meta-analysis of the literature on upwelling-favorable wind intensification. The preponderance of published analyses suggests that winds have intensified in the California, Benguela, and Humboldt upwelling systems and weakened in the Iberian system over time scales ranging up to 60 years; wind change is equivocal in the Canary system. Stronger intensification signals are observed at higher latitudes, consistent with the warming pattern associated with climate change. Overall, reported changes in coastal winds, although subtle and spatially variable, support Bakun’s hypothesis of upwelling intensification in eastern boundary current systems.

Mapping Jets and Eddies in an Eastern Boundary Current

1997 ◽  
Author(s):  
Adriana Huyer ◽  
P. M. Kosro ◽  
Jack A. Barth ◽  
Robert L. Smith
Keyword(s):  
Boundary Current ◽  
Eastern Boundary ◽  
Eastern Boundary Current

scholarly journals Radiating Instability of a Meridional Boundary Current

2008 ◽  
Vol 38 (10) ◽  
pp. 2294-2307 ◽  
Author(s):  
Hristina G. Hristova ◽  
Joseph Pedlosky ◽  
Michael A. Spall
Keyword(s):  
Western Boundary ◽  
Far Field ◽  
Boundary Current ◽  
Important Conclusion ◽  
Western Boundary Currents ◽  
Horizontal Structure ◽  
Boundary Currents ◽  
Zonal Jets ◽  
Eastern Boundary ◽  
Eastern Boundary Current

Abstract A linear stability analysis of a meridional boundary current on the beta plane is presented. The boundary current is idealized as a constant-speed meridional jet adjacent to a semi-infinite motionless far field. The far-field region can be situated either on the eastern or the western side of the jet, representing a western or an eastern boundary current, respectively. It is found that when unstable, the meridional boundary current generates temporally growing propagating waves that transport energy away from the locally unstable region toward the neutral far field. This is the so-called radiating instability and is found in both barotropic and two-layer baroclinic configurations. A second but important conclusion concerns the differences in the stability properties of eastern and western boundary currents. An eastern boundary current supports a greater number of radiating modes over a wider range of meridional wavenumbers. It generates waves with amplitude envelopes that decay slowly with distance from the current. The radiating waves tend to have an asymmetrical horizontal structure—they are much longer in the zonal direction than in the meridional, a consequence of which is that unstable eastern boundary currents, unlike western boundary currents, have the potential to act as a source of zonal jets for the interior of the ocean.

Sinking particle fluxes from the euphotic zone over the continental slope of an eastern boundary current region

1996 ◽  
Vol 54 (6) ◽  
pp. 1097-1122 ◽  
Author(s):  
M. A. Pena ◽  
K. L. Denman ◽  
J. R. Forbes ◽  
S. E. Calvert ◽  
R. E. Thomson
Keyword(s):  
Continental Slope ◽  
Euphotic Zone ◽  
Boundary Current ◽  
Eastern Boundary ◽  
Eastern Boundary Current ◽  
Current Region ◽  
Particle Fluxes
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