Northern Gulf of Alaska eddies and associated anomalies

In recent years, large anticyclonic eddies have been observed quasi-annually in the region seaward of Kodiak Island, Alaska. In situ sampling in 3 of these eddies was undertaken in 2002, 2003, and 2004. Satellite altimetry data showed that these 3 eddies had 3 different formation regions but their translation pathways were similar near Kodiak Island. Eddies in this region can persist for several years, moving southwestward along the Alaskan Peninsula to the Aleutian Archipelago. Water properties in the cores of the 2003 and 2004 eddies were significantly different from each other, probably because the 2003 eddy formed on the shelf near Yakutat while the 2004 eddy formed farther out in the basin in the northern Gulf of Alaska. Calculation of heat, salinity, and nutrient anomalies associated with the eddies showed that, in their subsurface core waters, the eddies carry excess heat, salt, nitrate and silicic acid seaward from the eddy formation regions.

[1]  D. Olson,et al.  Number 2 Exchange processes and watermass modi cations along the subarctic front in the North Paci c : Oxygen consumption rates and net carbon ux , 2004 .

[2]  Gilles Reverdin,et al.  from TOPEX/Poseidon and ERS-1 and -2 , 2000 .

[3]  S. Bograd,et al.  Near-surface circulation of the northeast Pacific Ocean derived from WOCE-SVP satellite-tracked drifters , 1999 .

[4]  P. Poulain,et al.  Measurements of the water-following capability of holey-sock and TRISTAR drifters , 1995 .

[5]  P. Stabeno,et al.  A note on cross-shelf exchange in the northern Gulf of Alaska , 2005 .

[6]  D. M. Nelson,et al.  Production and dissolution of biogenic silica in the ocean: Revised global estimates, comparison with regional data and relationship to biogenic sedimentation , 1995 .

[7]  S. Tabata.  The Anticyclonic, Baroclinic Eddy off Sitka, Alaska, in the Northeast Pacific Ocean , 1982 .

[8]  P. Stabeno,et al.  Observations from a Yakutat eddy in the northern Gulf of Alaska , 2005 .

[9]  G. Dibarboure,et al.  Mesoscale Mapping Capabilities of Multiple-Satellite Altimeter Missions , 1999 .

[10]  R. Feely,et al.  Oxygen Utilization and Organic Carbon Remineralization in the Upper Water Column of the Pacific Ocean , 2004 .

[11]  William R. Crawford,et al.  The influence of coastal origin eddies on oceanic plankton distributions in the eastern Gulf of Alaska , 2005 .

[12]  Hinch,et al.  Computer simulations of the effects of the Sitka eddy on the migration of sockeye salmon returning to British Columbia , 2000 .

[13]  D. Mackas,et al.  Zooplankton distribution and dynamics in a North Pacific Eddy of coastal origin: II. Mechanisms of eddy colonization by and retention of offshore species , 2005 .

[14]  P. L. Traon,et al.  AN IMPROVED MAPPING METHOD OF MULTISATELLITE ALTIMETER DATA , 1998 .

[15]  T. Weingartner,et al.  Freshwater variability and predictability in the Alaska Coastal Current , 2005 .

[16]  T. Weingartner,et al.  Satellite and hydrographic observations of eddy‐induced shelf‐slope exchange in the northwestern Gulf of Alaska , 2003 .

[17]  M. L. Gründlingh,et al.  Eddy fluxes of heat and salt from the southwest Indian Ocean into the southeast Atlantic Ocean : a case study , 1994 .

[18]  A. Heiskanen,et al.  Sedimentation of copepod fecal material in the coastal northern Baltic Sea: Where did all the pellets go? , 1999 .

[19]  P. Brickley,et al.  Impact of Haida Eddies on chlorophyll distribution in the Eastern Gulf of Alaska , 2005 .

[20]  Jorge L. Sarmiento,et al.  Redfield ratios of remineralization determined by nutrient data analysis , 1994 .

[21]  Thomas R. Loughlin,et al.  Oceanographic features related to northern fur seal migratory movements , 2005 .

[22]  W. Gardner,et al.  A comparison of aggregate profiles with sediment trap fluxes , 1992 .

[23]  P. Brickley,et al.  Satellite-measured seasonal and inter-annual chlorophyll variability in the Northeast Pacific and Coastal Gulf of Alaska , 2004 .

[24]  T. Weingartner,et al.  Circulation and hydrography in the northwestern Gulf of Alaska , 1992 .

[25]  H. Hurlburt,et al.  Mesoscale variability in the boundary currents of the Alaska Gyre , 2001 .

[26]  A. A. Ross,et al.  A Suggested Protocol for Continuous Flow Automated Analysis of Seawater Nutrients Using the Alpkem Flow Solution IV System (Phosphate, Nitrate, Nitrite, Silicic Acid and Ammonia) chemical protocols used in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study , 2001 .

[27]  P. Stabeno,et al.  Recent Observations of Variability in the Path and Vertical Structure of the Alaskan Stream , 1989 .

[28]  Josef Y. Cherniawsky,et al.  Multi‐year meanders and eddies in the Alaskan Stream as observed by TOPEX/Poseidon altimeter , 2000 .

[29]  D. Mackas,et al.  Zooplankton Distribution and Dynamics in a North Pacific Eddy of Coastal Origin: I. Transport and Loss of Continental Margin Species , 2002 .

[30]  D. M. Nelson,et al.  A review of the Si cycle in the modern ocean: recent progress and missing gaps in the application of biogenic opal as a paleoproductivity proxy , 2000 .

[31]  Jennifer B. Paduan,et al.  Spatial and temporal dynamics in marine aggregate abundance, sinking rate and flux: Monterey Bay, central California , 1998 .

[32]  P. Van Cappellen,et al.  Biogenic silica dissolution in the oceans: Reconciling experimental and field‐based dissolution rates , 2002 .

[33]  W. Crawford.  Heat and fresh water transport by eddies into the Gulf of Alaska , 2005 .

[34]  H. Melosh,et al.  Regulation of Oceanic Silicon and Carbon Preservation by Temperature Control on Bacteria , 2002 .

[35]  T. Kiørboe.  High turnover rates of copepod fecal pellets due to Noctiluca scintillans grazing , 2003 .

[36]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[37]  F. Favorite.  Oceanography of the subarctic Pacific region, 1960-71 , 1976 .

[38]  R. Millard,et al.  Anatomy of a cyclonic ring in the drake passage , 1981 .

[39]  G. Dibarboure,et al.  An Illustration of the Contribution of the TOPEX/Poseidon—Jason-1 Tandem Mission to Mesoscale Variability Studies , 2004 .

[40]  V. Smetácek.  Zooplankton standing stock, copepod faecal pellets and particulate detritus in Kiel Bight , 1980 .

[41]  R. Weiss,et al.  Basin-wide distributions of chlorofluorocarbons CFC-11 and CFC-12 in the North Pacific: 1985–1989 , 1996 .

[42]  Gilles Reverdin,et al.  Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2 , 2000 .

[43]  D. Olson,et al.  Modification of the intermediate waters in the northeastern subpolar Pacific , 1998 .