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• 1. [Article] Production of global sea surface temperature fields for the jet propulsion laboratory workshop comparisons

  Copyrighted by American Geophysical Union.

  Citation × Citation Citation Abstract Copy Title: Production of global sea surface temperature fields for the jet propulsion laboratory workshop comparisons Author: Chelton, Dudley B., Njoku, Eni G., Hilland, Jeffrey E. Copyrighted by American Geophysical Union. Title: Production of global sea surface temperature fields for the jet propulsion laboratory workshop comparisons Author: Chelton, Dudley B., Njoku, Eni G., Hilland, Jeffrey E. Copyrighted by American Geophysical Union. Close

• 2. [Article] Covariability of Surface Wind and Stress Responses to Sea Surface Temperature Fronts

  This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://www.ametsoc.org/pubs/journals/jcli/.

  Citation × Citation Citation Abstract Copy Title: Covariability of Surface Wind and Stress Responses to Sea Surface Temperature Fronts Author: Chelton, Dudley B., Esbensen, Steven K., O'Neill, Larry W. This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://www.ametsoc.org/pubs/journals/jcli/. Title: Covariability of Surface Wind and Stress Responses to Sea Surface Temperature Fronts Author: Chelton, Dudley B., Esbensen, Steven K., O'Neill, Larry W. This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://www.ametsoc.org/pubs/journals/jcli/. Close

• 3. [Article] Coupling between Sea Surface Temperature and Low-Level Winds in Mesoscale Numerical Models

  This study evaluates the impacts of sea surface temperature (SST) specification and grid resolution on numerical simulations of air–sea coupling near oceanic fronts through analyses of surface winds from ...

  Citation × Citation Citation Abstract Copy Title: Coupling between Sea Surface Temperature and Low-Level Winds in Mesoscale Numerical Models Author: Chelton, Dudley B., Thum, Nicolai, Esbensen, Steven K., O’Neill, Larry W., Song, Qingtao This study evaluates the impacts of sea surface temperature (SST) specification and grid resolution on numerical simulations of air–sea coupling near oceanic fronts through analyses of surface winds from the European Centre for Medium-Range Weather Forecasts (ECMWF) model. The 9 May 2001 change of the boundary condition from the Reynolds SST analyses to the NOAA Real-Time Global (RTG) SST in the ECMWF model resulted in an abrupt increase in mesoscale variance of the model surface winds over the ocean. In contrast, the 21 November 2000 change of the grid resolution resulted in an abrupt increase in mesoscale variability of surface winds over mountainous regions on land but had no significant effect on winds over the ocean. To further investigate model sensitivity to the SST boundary condition and grid resolution, a series of simulations were made with the Weather Research and Forecasting (WRF) model over a domain encompassing the Agulhas return current (ARC: also called “retroflection”) region in the south Indian Ocean. Results from three WRF simulations with SST measured by the Advanced Microwave Scanning Radiometer on the Earth Observing System Aqua satellite (AMSR-E) and the Reynolds and RTG SST analyses indicate the vital importance of the resolution of the SST boundary condition for accurate simulation of the air–sea coupling between SST and surface wind speed. WRF simulations with grid spacings of 40 and 25 km show that the latter increased energy only on scales shorter than 250 km. In contrast, improved resolution of SST significantly increased the mesoscale variability for scales up to 1000 km. Further sensitivity studies with the WRF model conclude that the weak coupling of surface wind speeds from the ECMWF model to SST is likely attributable primarily to the weak response of vertical turbulent mixing to SST-induced stability in the parameterization of boundary layer turbulence, with an overestimation of vertical diffusion by about 60% on average in stable conditions and an underestimation by about 40% in unstable conditions Title: Coupling between Sea Surface Temperature and Low-Level Winds in Mesoscale Numerical Models Author: Chelton, Dudley B., Thum, Nicolai, Esbensen, Steven K., O’Neill, Larry W., Song, Qingtao This study evaluates the impacts of sea surface temperature (SST) specification and grid resolution on numerical simulations of air–sea coupling near oceanic fronts through analyses of surface winds from the European Centre for Medium-Range Weather Forecasts (ECMWF) model. The 9 May 2001 change of the boundary condition from the Reynolds SST analyses to the NOAA Real-Time Global (RTG) SST in the ECMWF model resulted in an abrupt increase in mesoscale variance of the model surface winds over the ocean. In contrast, the 21 November 2000 change of the grid resolution resulted in an abrupt increase in mesoscale variability of surface winds over mountainous regions on land but had no significant effect on winds over the ocean. To further investigate model sensitivity to the SST boundary condition and grid resolution, a series of simulations were made with the Weather Research and Forecasting (WRF) model over a domain encompassing the Agulhas return current (ARC: also called “retroflection”) region in the south Indian Ocean. Results from three WRF simulations with SST measured by the Advanced Microwave Scanning Radiometer on the Earth Observing System Aqua satellite (AMSR-E) and the Reynolds and RTG SST analyses indicate the vital importance of the resolution of the SST boundary condition for accurate simulation of the air–sea coupling between SST and surface wind speed. WRF simulations with grid spacings of 40 and 25 km show that the latter increased energy only on scales shorter than 250 km. In contrast, improved resolution of SST significantly increased the mesoscale variability for scales up to 1000 km. Further sensitivity studies with the WRF model conclude that the weak coupling of surface wind speeds from the ECMWF model to SST is likely attributable primarily to the weak response of vertical turbulent mixing to SST-induced stability in the parameterization of boundary layer turbulence, with an overestimation of vertical diffusion by about 60% on average in stable conditions and an underestimation by about 40% in unstable conditions Close

• 4. [Article] Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer

  Boreal summer intraseasonal (30–90-day time scale) sea surface temperature (SST) variability in the east Pacific warm pool is examined using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager ...

  Citation × Citation Citation Abstract Copy Title: Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer Author: Chelton, Dudley B., Esbensen, Steven K., Maloney, Eric D. Boreal summer intraseasonal (30–90-day time scale) sea surface temperature (SST) variability in the east Pacific warm pool is examined using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) sea surface temperatures during 1998–2005. Intraseasonal SST variance maximizes at two locations in the warm pool: in the vicinity of 9°N, 92°W near the Costa Rica Dome and near the northern edge of the warm pool in the vicinity of 19°N, 108°W. Both locations exhibit a significant spectral peak at 50–60-day periods, time scales characteristic of the Madden–Julian oscillation (MJO). Complex empirical orthogonal function (CEOF) and spectra coherence analyses are used to show that boreal summer intraseasonal SST anomalies are coherent with precipitation anomalies across the east Pacific warm pool. Spatial variations of phase are modest across the warm pool, although evidence exists for the northward progression of intraseasonal SST and precipitation anomalies. Intraseasonal SSTs at the north edge of the warm pool lag those in the vicinity of the Costa Rica Dome by about 1 week. The MJO explains 30%–40% of the variance of intraseasonal SST anomalies in the east Pacific warm pool during boreal summer. Peak-to-peak SST variations of 0.8°–1.0°C occur during MJO events. SST is approximately in quadrature with MJO precipitation, with suppressed (enhanced) MJO precipitation anomalies leading positive (negative) SST anomalies by 7–10 days. Consistent with the CEOF and coherence analyses, MJO-related SST and precipitation anomalies near the Costa Rica Dome lead those at the northern edge of the warm pool by about 1 week. Title: Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer Author: Chelton, Dudley B., Esbensen, Steven K., Maloney, Eric D. Boreal summer intraseasonal (30–90-day time scale) sea surface temperature (SST) variability in the east Pacific warm pool is examined using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) sea surface temperatures during 1998–2005. Intraseasonal SST variance maximizes at two locations in the warm pool: in the vicinity of 9°N, 92°W near the Costa Rica Dome and near the northern edge of the warm pool in the vicinity of 19°N, 108°W. Both locations exhibit a significant spectral peak at 50–60-day periods, time scales characteristic of the Madden–Julian oscillation (MJO). Complex empirical orthogonal function (CEOF) and spectra coherence analyses are used to show that boreal summer intraseasonal SST anomalies are coherent with precipitation anomalies across the east Pacific warm pool. Spatial variations of phase are modest across the warm pool, although evidence exists for the northward progression of intraseasonal SST and precipitation anomalies. Intraseasonal SSTs at the north edge of the warm pool lag those in the vicinity of the Costa Rica Dome by about 1 week. The MJO explains 30%–40% of the variance of intraseasonal SST anomalies in the east Pacific warm pool during boreal summer. Peak-to-peak SST variations of 0.8°–1.0°C occur during MJO events. SST is approximately in quadrature with MJO precipitation, with suppressed (enhanced) MJO precipitation anomalies leading positive (negative) SST anomalies by 7–10 days. Consistent with the CEOF and coherence analyses, MJO-related SST and precipitation anomalies near the Costa Rica Dome lead those at the northern edge of the warm pool by about 1 week. Close

• 5. [Article] Modeling the Atmospheric Boundary Layer Wind Response to Mesoscale Sea Surface Temperature Perturbations

  This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://journals.ametsoc.org/loi/mwre.

  Citation × Citation Citation Abstract Copy Title: Modeling the Atmospheric Boundary Layer Wind Response to Mesoscale Sea Surface Temperature Perturbations Author: Chelton, Dudley B., Skyllingstad, Eric D., Samelson, Roger M., de Szoeke, Simon P., O'Neill, Larry W., Perlin, Natalie This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://journals.ametsoc.org/loi/mwre. Title: Modeling the Atmospheric Boundary Layer Wind Response to Mesoscale Sea Surface Temperature Perturbations Author: Chelton, Dudley B., Skyllingstad, Eric D., Samelson, Roger M., de Szoeke, Simon P., O'Neill, Larry W., Perlin, Natalie This is the publisher’s final pdf. The published article is copyrighted by the American Meteorological Society and can be found at: http://journals.ametsoc.org/loi/mwre. Close

• 6. [Article] Global Microwave Satellite Observations of Sea Surface Temperature for Numerical Weather Prediction and Climate Research

  Obtaining global sea surface temperature (SST) fields for the ocean boundary condition in numerical weather prediction (NWP) models and for climate research has long been problematic. Historically, such ...

  Citation × Citation Citation Abstract Copy Title: Global Microwave Satellite Observations of Sea Surface Temperature for Numerical Weather Prediction and Climate Research Author: Chelton, Dudley B., Wentz, Frank J. Obtaining global sea surface temperature (SST) fields for the ocean boundary condition in numerical weather prediction (NWP) models and for climate research has long been problematic. Historically, such fields have been constructed by a blending of in situ observations from ships and buoys and satellite infrared observations from the Advanced Very High Resolution Radiometer (AVHRR) that has been operational on NOAA satellites since November 1981. The resolution of these global SST fields is limited by the sparse coverage of in situ observations in many areas of the World Ocean and cloud contamination of AVHRR observations, which can exceed 75% over the subpolar oceans. As clouds and aerosols are essentially transparent to microwave radiation, satellite microwave observations can greatly improve the sampling and resolution of global SST fields. The Advanced Microwave Scanning Radiometer on the NASA Earth Observing System (EOS) Aqua satellite (AMSR-E) is providing the first highly accurate and global satellite microwave observations of SST. The potential for AMSR-E observations to improve the sampling, resolution, and accuracy of SST fields for NWP and climate research is demonstrated from example SST fields and from an investigation of the sensitivity of NWP models to specification of the SST boundary condition. Title: Global Microwave Satellite Observations of Sea Surface Temperature for Numerical Weather Prediction and Climate Research Author: Chelton, Dudley B., Wentz, Frank J. Obtaining global sea surface temperature (SST) fields for the ocean boundary condition in numerical weather prediction (NWP) models and for climate research has long been problematic. Historically, such fields have been constructed by a blending of in situ observations from ships and buoys and satellite infrared observations from the Advanced Very High Resolution Radiometer (AVHRR) that has been operational on NOAA satellites since November 1981. The resolution of these global SST fields is limited by the sparse coverage of in situ observations in many areas of the World Ocean and cloud contamination of AVHRR observations, which can exceed 75% over the subpolar oceans. As clouds and aerosols are essentially transparent to microwave radiation, satellite microwave observations can greatly improve the sampling and resolution of global SST fields. The Advanced Microwave Scanning Radiometer on the NASA Earth Observing System (EOS) Aqua satellite (AMSR-E) is providing the first highly accurate and global satellite microwave observations of SST. The potential for AMSR-E observations to improve the sampling, resolution, and accuracy of SST fields for NWP and climate research is demonstrated from example SST fields and from an investigation of the sensitivity of NWP models to specification of the SST boundary condition. Close

• 7. [Article] Central California Coastal Circulation Study : CTD observations, cruise 8401, February 1984

  Citation × Citation Citation Abstract Copy Title: Central California Coastal Circulation Study : CTD observations, cruise 8401, February 1984 Author: Chelton, Dudley B., Oregon State University. College of Oceanography, Kosro, P. Michael, 1951- Title: Central California Coastal Circulation Study : CTD observations, cruise 8401, February 1984 Author: Chelton, Dudley B., Oregon State University. College of Oceanography, Kosro, P. Michael, 1951- Close

• 8. [Article] Central California Coastal Circulation Study : CTD observations , cruise 8403, July 1984

  Citation × Citation Citation Abstract Copy Title: Central California Coastal Circulation Study : CTD observations , cruise 8403, July 1984 Author: Kosro, P. Michael, 1951-, Oregon State University. College of Oceanography, Chelton, Dudley B. Title: Central California Coastal Circulation Study : CTD observations , cruise 8403, July 1984 Author: Kosro, P. Michael, 1951-, Oregon State University. College of Oceanography, Chelton, Dudley B. Close

• 9. [Article] Central California Coastal Circulation Study : CTD observations, cruise 8404, October 1984

  Citation × Citation Citation Abstract Copy Title: Central California Coastal Circulation Study : CTD observations, cruise 8404, October 1984 Author: Kosro, P. Michael, 1951-, Oregon State University. College of Oceanography, Chelton, Dudley B. Title: Central California Coastal Circulation Study : CTD observations, cruise 8404, October 1984 Author: Kosro, P. Michael, 1951-, Oregon State University. College of Oceanography, Chelton, Dudley B. Close

• 10. [Article] Central California Coastal Circulation Study : CTD observations, cruise 8501, January 1985

  Citation × Citation Citation Abstract Copy Title: Central California Coastal Circulation Study : CTD observations, cruise 8501, January 1985 Author: Chelton, Dudley B., Oregon State University. College of Oceanography, Kosro, P. Michael, 1951- Title: Central California Coastal Circulation Study : CTD observations, cruise 8501, January 1985 Author: Chelton, Dudley B., Oregon State University. College of Oceanography, Kosro, P. Michael, 1951- Close