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• 11. [Article] Surface patterns in temperature, flow, phytoplankton biomass, and species composition in the coastal transition zone of northern California

  Satellite thermal imagery and in situ biological and physical data are presented that describe the spatial variability of phytoplankton biomass and species composition in relation to the physical structure ...

  Citation × Citation Citation Abstract Copy Title: Surface patterns in temperature, flow, phytoplankton biomass, and species composition in the coastal transition zone of northern California Author: Abbott, Mark R., Hood, Raleigh R., Huyer, Adriana, 1945-, Kosro, P. Michael, 1951- Satellite thermal imagery and in situ biological and physical data are presented that describe the spatial variability of phytoplankton biomass and species composition in relation to the physical structure at the sea surface during persistent upwelling off northern California. Surface patterns in temperature, geostrophic velocity, chlorophyll, and particle size structure show that the coastal zone was dominated by two water masses separated by a well-defined physical boundary. This boundary is apparent in satellite thermal imagery as a cold front and in dynamic height as a meandering jet in the California Current. On the landward side of the front (jet) we observed cold, coastal water that was relatively enriched in phytoplankton biomass, due to the presence of large diatoms. On the seaward side of the front (jet) we observed relatively warm water where the phytoplankton biomass was low and the diatoms were largely absent. Broad tongues and narrow filaments of cold, chlorophyll-rich water that extended over 100 km offshore were present in our study area. These features were bounded by the meandering coastal jet. The coldest, most chlorophyll-rich water in these tongues and filaments was located between the onshore and offshore flows in relatively slow moving water, but entrainment of coastal water into the jet was apparent. Title: Surface patterns in temperature, flow, phytoplankton biomass, and species composition in the coastal transition zone of northern California Author: Abbott, Mark R., Hood, Raleigh R., Huyer, Adriana, 1945-, Kosro, P. Michael, 1951- Satellite thermal imagery and in situ biological and physical data are presented that describe the spatial variability of phytoplankton biomass and species composition in relation to the physical structure at the sea surface during persistent upwelling off northern California. Surface patterns in temperature, geostrophic velocity, chlorophyll, and particle size structure show that the coastal zone was dominated by two water masses separated by a well-defined physical boundary. This boundary is apparent in satellite thermal imagery as a cold front and in dynamic height as a meandering jet in the California Current. On the landward side of the front (jet) we observed cold, coastal water that was relatively enriched in phytoplankton biomass, due to the presence of large diatoms. On the seaward side of the front (jet) we observed relatively warm water where the phytoplankton biomass was low and the diatoms were largely absent. Broad tongues and narrow filaments of cold, chlorophyll-rich water that extended over 100 km offshore were present in our study area. These features were bounded by the meandering coastal jet. The coldest, most chlorophyll-rich water in these tongues and filaments was located between the onshore and offshore flows in relatively slow moving water, but entrainment of coastal water into the jet was apparent. Close

• 12. [Article] SEASOAR and CTD observations during EBC cruises W9306A and W9308B, June to September 1993

  Citation × Citation Citation Abstract Copy Title: SEASOAR and CTD observations during EBC cruises W9306A and W9308B, June to September 1993 Author: Shearman, R. Kipp, Smith, Robert L. (Robert Lloyd), 1935-, Fleischbein, Jane, Oregon State University. College of Oceanic and Atmospheric Sciences, O'Malley, Robert T., Huyer, Adriana, 1945-, Kosro, P. Michael, 1951-, Barth, John A. Title: SEASOAR and CTD observations during EBC cruises W9306A and W9308B, June to September 1993 Author: Shearman, R. Kipp, Smith, Robert L. (Robert Lloyd), 1935-, Fleischbein, Jane, Oregon State University. College of Oceanic and Atmospheric Sciences, O'Malley, Robert T., Huyer, Adriana, 1945-, Kosro, P. Michael, 1951-, Barth, John A. Close

• 13. [Article] SEASOAR and CTD observations during a COARE surveys cruise, W9211C, 22 January to 22 February 1993

  Citation × Citation Citation Abstract Copy Title: SEASOAR and CTD observations during a COARE surveys cruise, W9211C, 22 January to 22 February 1993 Author: Oregon State University. College of Oceanic and Atmospheric Sciences, Huyer, Adriana, 1945- Title: SEASOAR and CTD observations during a COARE surveys cruise, W9211C, 22 January to 22 February 1993 Author: Oregon State University. College of Oceanic and Atmospheric Sciences, Huyer, Adriana, 1945- Close

• 14. [Article] A compilation of observations from moored current meters and thermographs. Vol. 5. Oregon continental shelf 31 July-21 September 1969

  Citation × Citation Citation Abstract Copy Title: A compilation of observations from moored current meters and thermographs. Vol. 5. Oregon continental shelf 31 July-21 September 1969 Author: National Science Foundation (U.S.), United States. Office of Naval Research, Huyer, Adriana, 1945-, Oregon State University. Dept. of Oceanography Title: A compilation of observations from moored current meters and thermographs. Vol. 5. Oregon continental shelf 31 July-21 September 1969 Author: National Science Foundation (U.S.), United States. Office of Naval Research, Huyer, Adriana, 1945-, Oregon State University. Dept. of Oceanography Close

• 15. [Article] CTD observations off the coast of Peru, R/V Melville, 4 March-22 May 1977, and R/V COLUMBUS ISELIN, 5 April-19 May 1977

  Citation × Citation Citation Abstract Copy Title: CTD observations off the coast of Peru, R/V Melville, 4 March-22 May 1977, and R/V COLUMBUS ISELIN, 5 April-19 May 1977 Author: Huyer, Adriana, 1945- Title: CTD observations off the coast of Peru, R/V Melville, 4 March-22 May 1977, and R/V COLUMBUS ISELIN, 5 April-19 May 1977 Author: Huyer, Adriana, 1945- Close

• 16. [Article] SeaSoar and CTD observations during coastal jet separation cruise W9408A, August to September 1994

  Citation × Citation Citation Abstract Copy Title: SeaSoar and CTD observations during coastal jet separation cruise W9408A, August to September 1994 Author: Smith, Robert L. (Robert Lloyd), 1935-, Fleischbein, Jane, Oregon State University. College of Oceanic and Atmospheric Sciences, Barth, John A., Huyer, Adriana, 1945-, O'Malley, Robert T. Title: SeaSoar and CTD observations during coastal jet separation cruise W9408A, August to September 1994 Author: Smith, Robert L. (Robert Lloyd), 1935-, Fleischbein, Jane, Oregon State University. College of Oceanic and Atmospheric Sciences, Barth, John A., Huyer, Adriana, 1945-, O'Malley, Robert T. Close

• 17. [Article] SEASOAR and CTD observations during a COARE surveys cruise, W9211A, 8 November to 8 December 1992

  Citation × Citation Citation Abstract Copy Title: SEASOAR and CTD observations during a COARE surveys cruise, W9211A, 8 November to 8 December 1992 Author: Oregon State University. College of Oceanic and Atmospheric Sciences, Huyer, Adriana, 1945- Title: SEASOAR and CTD observations during a COARE surveys cruise, W9211A, 8 November to 8 December 1992 Author: Oregon State University. College of Oceanic and Atmospheric Sciences, Huyer, Adriana, 1945- Close

• 18. [Article] Hydrographic data from the first coastal ocean dynamics experiment : R/V Wecoma, Leg 2, 10-14 April 1981

  Citation × Citation Citation Abstract Copy Title: Hydrographic data from the first coastal ocean dynamics experiment : R/V Wecoma, Leg 2, 10-14 April 1981 Author: Gilbert, William E., Schramm, Richard E., Huyer, Adriana, 1945-, Oregon State University. School of Oceanography Title: Hydrographic data from the first coastal ocean dynamics experiment : R/V Wecoma, Leg 2, 10-14 April 1981 Author: Gilbert, William E., Schramm, Richard E., Huyer, Adriana, 1945-, Oregon State University. School of Oceanography Close

• 19. [Article] Mesoscale surveys over the shelf and slope in the upwelling region near Point Arena, California

  Repeated mesoscale surveys of a 40-km-wide, 100-km-long, coastal region near Point Arena, California, were conducted during the upwelling season (April-August) in 1981 and 1982. Each survey included conventional ...

  Citation × Citation Citation Abstract Copy Title: Mesoscale surveys over the shelf and slope in the upwelling region near Point Arena, California Author: Huyer, Adriana, 1945-, Kosro, P. Michael, 1951- Repeated mesoscale surveys of a 40-km-wide, 100-km-long, coastal region near Point Arena, California, were conducted during the upwelling season (April-August) in 1981 and 1982. Each survey included conventional conductivity-temperature-depth casts at standard locations over the continental shelf and slope between 38°N and 39°10'N, and continuous operation of a Doppler acoustic log to obtain velocity profiles in the 20- to 150-m depth range. "Synoptic" surveys covered the entire grid in 2-3 days. Winds were strongly favorable for upwelling during the three 1981 surveys and were weak or variable during the three 1982 surveys. Surface temperature and salinity fields reflect the influence of both the seasonal winds and day-to-day variations in the wind. Persistently low surface salinities offshore reflect the general southward advection of subarctic waters, and sporadic low salinities over the inner shelf reflect northward advection of local runoff through an intermittent narrow countercurrent along the coast. Circulation patterns during all but one of the surveys were very complex and included meandering equatorward flow, cyclonic and anticyclonic eddies, and inshore countercurrents. The simple two-dimensional, equatorward, baroclinic coastal jet usually associated with coastal upwelling was observed during only one of our surveys. Overall average fields are relatively simple. They show broad equatorward surface flow, a very weak inshore countercurrent, and a definite poleward undercurrent at the shelf break. Average temperature, salinity, and density fields are generally congruent with the average flow pattern. Average isotherms and isohalines are not strictly parallel to the coastline: south of the coastline bend at Point Arena, they diverge gradually from the coast. Comparison of average sections calculated from 10 matched pairs of Central and Arena lines (separated by 50 km) shows there are systematic differences between them. Warmer, fresher waters lie nearer shore (and in shallower water) off Point Arena than on the Central line; this suggests that the surface waters flowing past Point Arena have sufficient southward momentum to cross isobaths. Comparison of average velocity sections on these two lines shows some differences in structure; since the variability is large, these may not be significant. Comparison of the measured and geostrophic average shears suggests there is a significant ageostrophic component in the upper layers above 40 m; it may be the signature of an average wind-driven Ekman spira Title: Mesoscale surveys over the shelf and slope in the upwelling region near Point Arena, California Author: Huyer, Adriana, 1945-, Kosro, P. Michael, 1951- Repeated mesoscale surveys of a 40-km-wide, 100-km-long, coastal region near Point Arena, California, were conducted during the upwelling season (April-August) in 1981 and 1982. Each survey included conventional conductivity-temperature-depth casts at standard locations over the continental shelf and slope between 38°N and 39°10'N, and continuous operation of a Doppler acoustic log to obtain velocity profiles in the 20- to 150-m depth range. "Synoptic" surveys covered the entire grid in 2-3 days. Winds were strongly favorable for upwelling during the three 1981 surveys and were weak or variable during the three 1982 surveys. Surface temperature and salinity fields reflect the influence of both the seasonal winds and day-to-day variations in the wind. Persistently low surface salinities offshore reflect the general southward advection of subarctic waters, and sporadic low salinities over the inner shelf reflect northward advection of local runoff through an intermittent narrow countercurrent along the coast. Circulation patterns during all but one of the surveys were very complex and included meandering equatorward flow, cyclonic and anticyclonic eddies, and inshore countercurrents. The simple two-dimensional, equatorward, baroclinic coastal jet usually associated with coastal upwelling was observed during only one of our surveys. Overall average fields are relatively simple. They show broad equatorward surface flow, a very weak inshore countercurrent, and a definite poleward undercurrent at the shelf break. Average temperature, salinity, and density fields are generally congruent with the average flow pattern. Average isotherms and isohalines are not strictly parallel to the coastline: south of the coastline bend at Point Arena, they diverge gradually from the coast. Comparison of average sections calculated from 10 matched pairs of Central and Arena lines (separated by 50 km) shows there are systematic differences between them. Warmer, fresher waters lie nearer shore (and in shallower water) off Point Arena than on the Central line; this suggests that the surface waters flowing past Point Arena have sufficient southward momentum to cross isobaths. Comparison of average velocity sections on these two lines shows some differences in structure; since the variability is large, these may not be significant. Comparison of the measured and geostrophic average shears suggests there is a significant ageostrophic component in the upper layers above 40 m; it may be the signature of an average wind-driven Ekman spira Close

• 20. [Article] Mixing of chlorophyll from the Middle Atlantic Bight cold pool into the Gulf Stream at Cape Hatteras in July 1993

  In July 1993 we collected hydrographic data and information on chlorophyll distribution on the continental shelf north of Cape Hatteras and across the shelf break at Cape Hatteras. The data show that a ...

  Citation × Citation Citation Abstract Copy Title: Mixing of chlorophyll from the Middle Atlantic Bight cold pool into the Gulf Stream at Cape Hatteras in July 1993 Author: Huyer, Adriana, 1945-, Sherry, Nelson D., Wood, A. Michelle In July 1993 we collected hydrographic data and information on chlorophyll distribution on the continental shelf north of Cape Hatteras and across the shelf break at Cape Hatteras. The data show that a warm, transparent mixed layer lies over much colder, euphotic, chlorophyll-rich bottom water on the shelf. This layer has temperature and salinity properties characteristic of the Middle Atlantic Bight (MAB) cold pool, a distinctive mass of cold bottom water formed when cold water from the Gulf of Maine and Scotian Shelf is isolated from surface water by vernal warming and seasonal stratification [Houghton et al., 1982]. The constant density of this chlorophyll-rich water (σФ = 25.0–25.6) combined with a strong chlorophyll gradient along the 25 σФ isopycnal at the shelf break indicates that chlorophyll advected off the shelf at Cape Hatteras in July 1993. TS diagrams further indicate that cold pool water, and the chlorophyll it contained, mixed into upper levels of the Gulf Stream. Thus the MAB may contribute to the nutrient budget of Atlantic surface waters through a long loop of circulation that transports deep water from the Labrador Sea to Cape Hatteras. Title: Mixing of chlorophyll from the Middle Atlantic Bight cold pool into the Gulf Stream at Cape Hatteras in July 1993 Author: Huyer, Adriana, 1945-, Sherry, Nelson D., Wood, A. Michelle In July 1993 we collected hydrographic data and information on chlorophyll distribution on the continental shelf north of Cape Hatteras and across the shelf break at Cape Hatteras. The data show that a warm, transparent mixed layer lies over much colder, euphotic, chlorophyll-rich bottom water on the shelf. This layer has temperature and salinity properties characteristic of the Middle Atlantic Bight (MAB) cold pool, a distinctive mass of cold bottom water formed when cold water from the Gulf of Maine and Scotian Shelf is isolated from surface water by vernal warming and seasonal stratification [Houghton et al., 1982]. The constant density of this chlorophyll-rich water (σФ = 25.0–25.6) combined with a strong chlorophyll gradient along the 25 σФ isopycnal at the shelf break indicates that chlorophyll advected off the shelf at Cape Hatteras in July 1993. TS diagrams further indicate that cold pool water, and the chlorophyll it contained, mixed into upper levels of the Gulf Stream. Thus the MAB may contribute to the nutrient budget of Atlantic surface waters through a long loop of circulation that transports deep water from the Labrador Sea to Cape Hatteras. Close