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• 1. [Article] An apparent wave height dependence in the sea-state bias in Geosat altimeter range measurements

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: An apparent wave height dependence in the sea-state bias in Geosat altimeter range measurements Author: Chelton, Dudley B., Witter, Donna L. Copyrighted by American Geophysical Union. Title: An apparent wave height dependence in the sea-state bias in Geosat altimeter range measurements Author: Chelton, Dudley B., Witter, Donna L. Copyrighted by American Geophysical Union. Close

• 2. [Article] Geographical Variability of the First Baroclinic Rossby Radius of Deformation

  Global 1° × 1° climatologies of the first baroclinic gravity-wave phase speed c¹ and the Rossby radius of deformation λ1 are computed from climatological average temperature and salinity profiles. These ...

  Citation × Citation Citation Abstract Copy Title: Geographical Variability of the First Baroclinic Rossby Radius of Deformation Author: El Naggar, Karim, Chelton, Dudley B., Schlax, Michael G., Siwertz, Nicolas, deSzoeke, Roland A. Global 1° × 1° climatologies of the first baroclinic gravity-wave phase speed c¹ and the Rossby radius of deformation λ1 are computed from climatological average temperature and salinity profiles. These new atlases are compared with previously published 5° × 5° coarse resolution maps of λ₁ for the Northern Hemisphere and the South Atlantic and with a 1° × 1° fine-resolution map of c₁ for the tropical Pacific. It is concluded that the methods used in these earlier estimates yield values that are biased systematically low by 5%–15% owing to seemingly minor computational errors. Geographical variations in the new high-resolution maps of c₁ and λ₁ are discussed in terms of a WKB approximation that elucidates the effects of earth rotation, stratification, and water depth on these quantities. It is shown that the effects of temporal variations of the stratification can be neglected in the estimation of c₁ and λ₁ at any particular location in the World Ocean. This is rationalized from consideration of the WKB approximation. Title: Geographical Variability of the First Baroclinic Rossby Radius of Deformation Author: El Naggar, Karim, Chelton, Dudley B., Schlax, Michael G., Siwertz, Nicolas, deSzoeke, Roland A. Global 1° × 1° climatologies of the first baroclinic gravity-wave phase speed c¹ and the Rossby radius of deformation λ1 are computed from climatological average temperature and salinity profiles. These new atlases are compared with previously published 5° × 5° coarse resolution maps of λ₁ for the Northern Hemisphere and the South Atlantic and with a 1° × 1° fine-resolution map of c₁ for the tropical Pacific. It is concluded that the methods used in these earlier estimates yield values that are biased systematically low by 5%–15% owing to seemingly minor computational errors. Geographical variations in the new high-resolution maps of c₁ and λ₁ are discussed in terms of a WKB approximation that elucidates the effects of earth rotation, stratification, and water depth on these quantities. It is shown that the effects of temporal variations of the stratification can be neglected in the estimation of c₁ and λ₁ at any particular location in the World Ocean. This is rationalized from consideration of the WKB approximation. Close

• 3. [Article] Large-scale sea surface temperature variability from satellite and shipboard measurements

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: Large-scale sea surface temperature variability from satellite and shipboard measurements Author: Chelton, Dudley B., Berstein, R. Copyrighted by American Geophysical Union. Title: Large-scale sea surface temperature variability from satellite and shipboard measurements Author: Chelton, Dudley B., Berstein, R. Copyrighted by American Geophysical Union. Close

• 4. [Article] Effects of stencil width on surface ocean geostrophic velocity and vorticity estimation from gridded satellite altimeter data

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/.

  Citation × Citation Citation Abstract Copy Title: Effects of stencil width on surface ocean geostrophic velocity and vorticity estimation from gridded satellite altimeter data Author: Arbic, Brian K., Shriver, Jay F., Scott, Robert B., Richman, James G., Chelton, Dudley B. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. Title: Effects of stencil width on surface ocean geostrophic velocity and vorticity estimation from gridded satellite altimeter data Author: Arbic, Brian K., Shriver, Jay F., Scott, Robert B., Richman, James G., Chelton, Dudley B. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. Close

• 5. [Article] On the Use of QuikSCAT Scatterometer Measurements of Surface Winds for Marine Weather Prediction

  The value of Quick Scatterometer (QuikSCAT) measurements of 10-m ocean vector winds for marine weather prediction is investigated from two Northern Hemisphere case studies. The first of these focuses on an ...

  Citation × Citation Citation Abstract Copy Title: On the Use of QuikSCAT Scatterometer Measurements of Surface Winds for Marine Weather Prediction Author: Von Ahn, Joan M., Freilich, Michael H., Chelton, Dudley B., Sienkiewicz, Joseph M. The value of Quick Scatterometer (QuikSCAT) measurements of 10-m ocean vector winds for marine weather prediction is investigated from two Northern Hemisphere case studies. The first of these focuses on an intense cyclone with hurricane-force winds that occurred over the extratropical western North Pacific on 10 January 2005. The second is a 17 February 2005 example that is typical of sea surface temperature influence on low-level winds in moderate wind conditions in the vicinity of the Gulf Stream in the western North Atlantic. In both cases, the analyses of 10-m winds from the NCEP and ECMWF global numerical weather prediction models considerably underestimated the spatial variability of the wind field on scales smaller than 1000 km compared with the structure determined from QuikSCAT observations. The NCEP and ECMWF models both assimilate QuikSCAT observations. While the accuracies of the 10-m wind analyses from these models measurably improved after implementation of the QuikSCAT data assimilation, the information content in the QuikSCAT data is underutilized by the numerical models. QuikSCAT data are available in near–real time in the NOAA/NCEP Advanced Weather Interactive Processing System (N-AWIPS) and are used extensively in manual analyses of surface winds. The high resolution of the QuikSCAT data is routinely utilized by forecasters at the NOAA/NCEP Ocean Prediction Center, Tropical Prediction Center, and other NOAA weather forecast offices to improve the accuracies of wind warnings in marine forecasts. Title: On the Use of QuikSCAT Scatterometer Measurements of Surface Winds for Marine Weather Prediction Author: Von Ahn, Joan M., Freilich, Michael H., Chelton, Dudley B., Sienkiewicz, Joseph M. The value of Quick Scatterometer (QuikSCAT) measurements of 10-m ocean vector winds for marine weather prediction is investigated from two Northern Hemisphere case studies. The first of these focuses on an intense cyclone with hurricane-force winds that occurred over the extratropical western North Pacific on 10 January 2005. The second is a 17 February 2005 example that is typical of sea surface temperature influence on low-level winds in moderate wind conditions in the vicinity of the Gulf Stream in the western North Atlantic. In both cases, the analyses of 10-m winds from the NCEP and ECMWF global numerical weather prediction models considerably underestimated the spatial variability of the wind field on scales smaller than 1000 km compared with the structure determined from QuikSCAT observations. The NCEP and ECMWF models both assimilate QuikSCAT observations. While the accuracies of the 10-m wind analyses from these models measurably improved after implementation of the QuikSCAT data assimilation, the information content in the QuikSCAT data is underutilized by the numerical models. QuikSCAT data are available in near–real time in the NOAA/NCEP Advanced Weather Interactive Processing System (N-AWIPS) and are used extensively in manual analyses of surface winds. The high resolution of the QuikSCAT data is routinely utilized by forecasters at the NOAA/NCEP Ocean Prediction Center, Tropical Prediction Center, and other NOAA weather forecast offices to improve the accuracies of wind warnings in marine forecasts. Close