Results 171 to 180 of about 1,135 (197)

Decadal Spinup of the South Pacific Subtropical Gyre

Journal of Physical Oceanography, 2007
Abstract An increase in the circulation of the South Pacific Ocean subtropical gyre, extending from the sea surface to middepth, is observed over 12 years. Datasets used to quantify the decadal gyre spinup include satellite altimetric height, the World Ocean Circulation Experiment (WOCE) hydrographic and float survey of the South Pacific,
R. Davis, J. Gilson, D. Roemmich, P. Sutton, S. Wijffels, S. Riser   +5 more
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Cross-Gyre Ventilation of the Subtropical Gyre: An Internal Mode in the Ventilated Thermocline

Journal of Physical Oceanography, 1984
Abstract A model of cross-gyre geostrophic flow is presented. It is a two-layer model of the (Northern Hemisphere) subtropical thermocline above a resting lower ocean. The northern boundary of the gyre is taken to be a latitude circle on which the Ekman pumping vanishes.
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Cooling Spirals and Recirculation in the Subtropical Gyre

Journal of Physical Oceanography, 1992
Abstract The influence of cooling in a western boundary current on the recirculation of parcels in the subtropical gyre and their eventual transfer into the subpolar gyre is investigated. It is shown that heat loss to the atmosphere and the resulting vertical convection of dense water in the Gulf Stream of a general circulation primitive equation model
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The beta spiral in the North Atlantic subtropical gyre

Deep Sea Research Part A. Oceanographic Research Papers, 1980
Abstract The results of the first hydrographic cruise specifically designed to test calculations of the β spiral are discussed. The method, first proposed by Stommel and Schott ( Deep-Sea Research , 24 , 325–329, 1977), permits the computation of absolute geostrophic velocities from observations of density alone.
David W. Behringer, Henry Stommel
openaire   +1 more source

Siderophore cycling in the North Pacific Subtropical Gyre

2023
Across large regions of the surface ocean, the essential micronutrient iron (Fe) limits the growth of microbes, including phytoplankton and heterotrophic bacteria. In order to adapt to chronic low Fe conditions, some heterotrophic bacteria are able to produce siderophores, which are small organic ligands with extraordinarily high stability constant for
openaire   +1 more source

Remineralization Ratios in the Subtropical North Pacific Gyre

Aquatic Geochemistry, 2000
Based on a new mixing model of two end-members, the water column remineralization ratios of P/N/Corg - O2 = 1/13 ± 1/135 ± 18/170 ± 9 are obtained for the Hawaii Ocean Time-series (HOT) data set at station ALOHA. The traditional Redfield ratios of P/N/Corg/–O2 = 1/16/106/138 have standard deviations of more than 50%, when they are based on the average ...
Yuan-Hui Li, David M. Karl, Christopher D. Winn, Fred T. Mackenzie, Kathleen Gans   +4 more
openaire   +1 more source

On the interannual variability of nitrogen fixation in the subtropical gyres

Journal of Marine Research, 2009
Time-series observations of geochemical tracers and diazotroph abundances in the northern subtropical gyres suggest variability in nitrogen fixation on interannual and longer timescales. Using a highly idealized model of the biogeochemistry and ecology of a subtropical gyre, we explore the previously proposed hypothesis that such variability is ...
Monteiro, FM, Follows, Mick
openaire   +2 more sources

Depth Distribution of the Subtropical Gyre in the North Pacific

Journal of Oceanography, 2002
Large-scale aspects of the North Pacific subtropical gyre have been investigated using a climatology of temperature and salinity (World Ocean Atlas 1998). In the central and eastern parts of the basin, the axis of the subtropical gyre, defined as the meridional maximum of dynamic height, tends to move poleward from about 25°N near the surface to about ...
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Monitoring the Variability of the Subtropical Gyres

2001
US-GLOBEC NEP ...
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The role of the subtropical gyres in the heat balance of the Warmwassersphaere

Journal of Marine Systems, 1990
Abstract A coupled oceanic mixed layer-atmospheric subcloud layer model is used to analyze warm water mass formation in subtropical oceans. The influence of large scale circulation is parameterized by prescribing winds and currents, radiant heat gain and loss and air temperature and humidity above cloud base.
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