Browsing Oceanography Faculty Research, Publications and Presentations by Issue Date
Now showing items 21-40 of 151
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An Observational Study of the Energy-Transfer between the Seasonal Mean Flow and Transient Eddies
The large-scale energetics of the Northern Hemisphere atmospheric motions are computed in the frequency domain using a 5-year data set from the ECMWF operational analyses. The geographical distributions of kinetic energy ... -
Phytoplankton Growth and Light-Absorption as Regulated by Light, Temperature, and Nutrients
Numerous studies of the growth of phytoplankton in the laboratory have demonstrated the dependence of cellular pigment concentration and growth rate upon light intensity, photoperiod, temperature, and nutrient supply. These ... -
Hypotheses to Explain High-Nutrient Conditions in the Open Sea
Oceanic high-nutrient, low-chlorophyll waters are characterized principally by the persistence of major nutrients at the sea surface. This condition indicates control of autotrophic production by something other than NO3 ... -
Photosynthetic characteristics and estimated growth rates indicate grazing is the proximate control of primary production in the Equatorial Pacific
Macronutrients persist in the surface layer of the equatorial Pacific Ocean because the production of phytoplankton is limited. Measurements of photosynthesis as a function of irradiance (P-I) provide information on the ... -
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter
For a number of years during the 1980s, observations of the physical and chemical properties of seawater in the southeastern Beaufort Sea have been acquired in late winter. The most complete data set, from 1987, has been ... -
Dissolved organic phosphorus concentrations in the northeast subarctic Pacific Ocean
Shipboard determinations of dissolved organic P (DOP) concentrations were made for NE subarctic Pacific Ocean samples with three different oxidation-hydrolysis methods: UV irradiation, acid persulfate digestion, and a ... -
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter
For a number of years during the 1980s, observations of the physical and chemical properties of seawater in the southeastern Beaufort Sea have been acquired in late winter. The most complete data set, from 1987, has been ... -
Primary Production Estimates from Recordings of Solar Stimulated Fluorescence in the Equatorial Pacific at 150-Degrees-W
Biological, optical, and hydrographical data were collected on the WEC88 cruise along 150-degrees-W and during a 6-day time series station on the equator during February/March 1988. This area was characterized by a subsurface ... -
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A modified galerkin-spectral model for three-dimensional, barotropic, wind-driven shelf circulation
The authors describe an efficient numerical scheme for calculating wind-driven currents on the continental shelf. Our scheme is based on the spectral approach introduced by Heaps and subsequently modified by Lardner. The ... -
Distributions of Pigments and Primary Production in a Gulf-Stream Meander
An investigation was made of physical effects of Gulf Stream meandering on the vertical and horizontal distributions of photosynthetic pigments and primary production. Cruises were conducted in the vicinity of a meander ... -
New production in the warm waters of the Tropical Pacific Ocean
The average depth-integrated rate of new production in the tropical Pacific Ocean was estimated from a calculation of horizontal and vertical nitrate balance over the region enclosed by the climatological 26 degree C ... -
Surface heat flux, horizontal advection, and the seasonal evolution of water temperature on the Scotian Shelf
Seasonal temperature variations on the Scotian Shelf penetrate to a depth of about 75 m. The net surface heat flux (Q) can explain about 85% of the annual cycle in the rate of change of mean temperature over this depth ... -
Measurements of methyl chloride in the Northwest Atlantic
Methyl chloride was measured directly in seawater using a purge and trap system and gas chromatography with electron capture detection. The results indicate that surface waters of the northwest Atlantic are a source of ... -
The continent-ocean crustal transition across the southwest Greenland margin
The complete crustal transition across the nonvolcanic, southwest Greenland continental margin of the Labrador Sea is examined using wide-angle and coincident vertical-incidence seismic profiles. Six ocean bottom seismometers ... -
Photochemical Production of Methyl-Iodide in Seawater
It is generally accepted that methyl iodide is a major contributor to the flux of iodine from the ocean to the atmosphere, but its sources in the ocean are largely unknown, an exception being production by certain species ... -
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Changes in buoyancy and chemical composition during growth of a coastal marine diatom: Ecological and biogeochemical consequences
Growth and sinking of the coastal marine diatom Thalassiosira weissflogii was studied during experiments in a 2.1 m tall water column. Under nutrient-replete conditions, T. weissflogii grew rapidly in the upper layer of ...
