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Oceanography and Atmospheric Sciences and Meteorology

CCPO Publications

2002

Articles 1 - 7 of 7

Full-Text Articles in Physical Sciences and Mathematics

Oceanographic Observations In Chilean Coastal Waters Between Valdivia And Concepcion, Larry P. Atkinson, Arnoldo Valle-Levinson, Dante Figueroa, Ricardo De Pol-Holz, Victor A. Gallardo, Wolfgang Schneider, Jose L. Blanco, Mike Schmidt Jul 2002

Oceanographic Observations In Chilean Coastal Waters Between Valdivia And Concepcion, Larry P. Atkinson, Arnoldo Valle-Levinson, Dante Figueroa, Ricardo De Pol-Holz, Victor A. Gallardo, Wolfgang Schneider, Jose L. Blanco, Mike Schmidt

CCPO Publications

The physical oceanography of the biologically productive coastal waters of central Chile (36 degrees to 40 degrees S) is relatively unknown. In December 1998 we made a short exploratory cruise between Valdivia (40 degrees S) and Concepcion (37.8 degrees S) taking temperature, salinity, oxygen, and current velocity profiles. Coincident sea surface temperature and color measurements were obtained by satellite. The results showed an area dominated by wind-induced coastal upwelling, river runoff, intrusion of offshore eddies, mixing, and heating. Upwelling centers were found over the shelf at three locations: inshore of Mocha Island, off Valdivia, and off Lavapie Point. At these …

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Variation In The Position Of The Upwelling Front On The Oregon Shelf, Jay A. Austin, John A. Barth Jan 2002

Variation In The Position Of The Upwelling Front On The Oregon Shelf, Jay A. Austin, John A. Barth

CCPO Publications

As part of an experiment to study wind-driven coastal circulation, 17 hydrographic surveys of the middle to inner shelf region off the coast of Newport, OR (44.65°N, from roughly the 90 m isobath to the 10 m isobath) were performed during Summer 1999 with a small, towed, undulating vehicle. The cross-shelf survey data were combined with data from several other surveys at the same latitude to study the relationship between upwelling intensity and wind stress field. A measure of upwelling intensity based on the position of the permanent pycnocline is developed. This measure is designed so as to be insensitive …

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Estimating The Mean Ocean-Bay Exchange Rate Of The Chesapeake Bay, Jay A. Austin Jan 2002

Estimating The Mean Ocean-Bay Exchange Rate Of The Chesapeake Bay, Jay A. Austin

CCPO Publications

A model of the salt balance in the Chesapeake Bay is discussed, which takes into account only time-dependent riverine input and mean ocean-bay exchange. Estimates of (spatial) mean bay salinity are made using two different data sources: a 16 year record of surveys taken by the Environmental Protection Agency's Chesapeake Bay Program, and a 10 year record of hydrographic sections taken in the lower bay by the Center for Coastal Physical Oceanography at Old Dominion University. Using United States Geological Survey river flow data to force the model, both data sets are consistent with this simple model and both imply …

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Hydrographic Conditions Off Northern Chile During The 1996-1998 La Niña And El Niño Events, Jose Luis Blanco, Mary-Elena Carr, Andrew C. Thomas, P. Ted Strub Jan 2002

Hydrographic Conditions Off Northern Chile During The 1996-1998 La Niña And El Niño Events, Jose Luis Blanco, Mary-Elena Carr, Andrew C. Thomas, P. Ted Strub

CCPO Publications

The evolution of oceanographic conditions in the upwelling region off northern Chile (18°-24°S) between 1996 and 1998 (including the 1997-1998 El Niño) is presented using hydrographic measurements acquired on quarterly cruises of the Chilean Fisheries Institute, with sea surface temperature (SST), sea level, and wind speeds from Arica (18.5°S), Iquique (20.5°S), and Antofagasta (23.5°S) and a time series of vertical temperature profiles off Iquique. Spatial patterns of sea surface temperature and salinity from May 1996 to March 1997 followed a normal seasonal progression, though conditions were anomalously cool and fresh. Starting in March 1997, positive anomalies in sea level and …

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The Northeast Pacific Globec Program: Coastal Gulf Of Alaska, Thomas J. Weingartner, Kenneth Coyle, Bruce Finney, Russell Hopcroft, Terry Whitledge, Richard Brodeur, Michael Dagg, Edward Farley, Dale Haidvogel, Thomas Royer Jan 2002

The Northeast Pacific Globec Program: Coastal Gulf Of Alaska, Thomas J. Weingartner, Kenneth Coyle, Bruce Finney, Russell Hopcroft, Terry Whitledge, Richard Brodeur, Michael Dagg, Edward Farley, Dale Haidvogel, Thomas Royer

CCPO Publications

(First Paragraph) The Gulf of Alaska (GOA) continental shelf encompasses approximately 370,000 km2, or about 13% of the U.S. continental shell and supports a rich and diverse marine ecosystem including some of the largest commercial fisheries in the U.S. Exclusive Economic Zone. Of particular economic importance is the salmon fishery, which was worth on the order of $170 million (landed value) in 2000 accrued from a catch of over 100 million fish. However, there is considerable variability on both interannual and longer time scales in harvest and recruitment success to this and other GOA fisheries. Of recent interest …

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Response Of Anchovy (Engaulis Ringens) Off Northern Chile To The 1997-1999 El Niño-La Niña Sequence, José L. Blanco, Patricio Barria, Jorge Castillo, Larry P. Atkinson Jan 2002

Response Of Anchovy (Engaulis Ringens) Off Northern Chile To The 1997-1999 El Niño-La Niña Sequence, José L. Blanco, Patricio Barria, Jorge Castillo, Larry P. Atkinson

CCPO Publications

No abstract provided.

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Wintertime Shoreward Near-Surface Currents South Of Cape Hatteras, Dana K. Savidge Jan 2002

Wintertime Shoreward Near-Surface Currents South Of Cape Hatteras, Dana K. Savidge

CCPO Publications

[1] Cross-isobath flow on continental shelves is of interest for a variety of reasons. Near Cape Hatteras, North Carolina, the transport of larval organisms, pollutants, and oceanic carbon budget constituents to and from the adjacent Albemarle and Pamlico Sounds may depend critically on cross-isobath currents. Shoreward currents in the near-surface waters south of Cape Hatteras are documented herein, on the basis of continuous 2-year time series, encompassing all or part of three consecutive winters. Energetic shoreward currents exist similar to30% of the time from midfall through late spring. These currents are evident over the 20 and 35 m isobaths along …

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