Journal of Atmospheric and Oceanic Technology: Recent submissions

Now showing items 2861-2880 of 5084

    • Development of an Atlantic Canadian Coastal Water Level Neural Network Model 

      Han, Guoqi; Shi, Yu (American Meteorological Society, 2008)
      Coastal water-level information is essential for coastal zone management, navigation, and oceanographic research. However, long-term water-level observations are usually only available at a limited number of locations. ...

    • In Situ Calibration of Moored CTDs Used for Monitoring Abyssal Water 

      Uchida, Hiroshi; Kawano, Takeshi; Fukasawa, Masao (American Meteorological Society, 2008)
      To monitor changes in heat content and geostrophic volume transport of abyssal water accurately, 50 moored conductivity?temperature?depth (CTD) recorders used for density measurements were calibrated in situ by simultaneous ...

    • Calculating the Ocean’s Mean Dynamic Topography from a Mean Sea Surface and a Geoid 

      Bingham, Rory J.; Haines, Keith; Hughes, Chris W. (American Meteorological Society, 2008)
      In principle the global mean geostrophic surface circulation of the ocean can be diagnosed by subtracting a geoid from a mean sea surface (MSS). However, because the resulting mean dynamic topography (MDT) is approximately ...

    • A Surface Wave Model for Coupling with Numerical Ocean Circulation Models 

      Mellor, George L.; Donelan, Mark A.; Oey, Lie-Yauw (American Meteorological Society, 2008)
      A surface wave model is developed with the intention of coupling it to three-dimensional ocean circulation models. The model is based on a paper by Mellor wherein depth-dependent coupling terms were derived. To be compatible ...

    • On Scatterometer Ocean Stress 

      Portabella, M.; Stoffelen, A. (American Meteorological Society, 2009)
      Scatterometers estimate the relative atmosphere?ocean motion at spatially high resolution and provide accurate inertial-scale ocean wind forcing information, which is crucial for many ocean, atmosphere, and climate ...

    • Accuracy in Mooring Motion Temperature Corrections 

      Meinen, Christopher S. (American Meteorological Society, 2008)
      Moored temperature sensors, whether fixed or profiling, routinely need to be corrected to remove the signals associated with the vertical motion of the sensors when the moorings ?blow over? in strong flow events (for ...

    • A Simulation Study Using a Local Ensemble Transform Kalman Filter for Data Assimilation in New York Harbor 

      Hoffman, Ross N.; Ponte, Rui M.; Kostelich, Eric J.; Blumberg, Alan; Szunyogh, Istvan; Vinogradov, Sergey V.; Henderson, John M. (American Meteorological Society, 2008)
      Data assimilation approaches that use ensembles to approximate a Kalman filter have many potential advantages for oceanographic applications. To explore the extent to which this holds, the Estuarine and Coastal Ocean Model ...

    • Determination of AATSR Biases Using the OSTIA SST Analysis System and a Matchup Database 

      Stark, J. D.; Donlon, C.; O’Carroll, A.; Corlett, G. (American Meteorological Society, 2008)
      Sea surface temperature (SST) analyses are produced on a daily basis at the Met Office using the Operational SST and Sea Ice Analysis (OSTIA) system. OSTIA uses satellite SST data, provided by international agencies via ...

    • A Technique for Eliminating Water Returns from Lidar Beach Elevation Surveys 

      Yates, Marissa L.; Guza, R. T.; Gutierrez, Roberto; Seymour, Richard (American Meteorological Society, 2008)
      Airborne light detecting and ranging (lidar) systems can survey hundreds of kilometers of shoreline with high spatial resolution (several elevation estimates per square meter). Sequential surveys yield spatial change maps ...

    • On the Quality of Real-Time Altimeter Gridded Fields: Comparison with In Situ Data 

      Pascual, Ananda; Boone, Christine; Larnicol, Gilles; Le Traon, Pierre-Yves (American Meteorological Society, 2009)
      The timeliness of satellite altimeter measurements has a significant effect on their value for operational oceanography. In this paper, an Observing System Experiment (OSE) approach is used to assess the quality of real-time ...

    • Quality Control of Large Argo Datasets 

      Gaillard, Fabienne; Autret, Emmanuelle; Thierry, Virginie; Galaup, Philippe; Coatanoan, Christine; Loubrieu, Thomas (American Meteorological Society, 2009)
      Argo floats have significantly improved the observation of the global ocean interior, but as the size of the database increases, so does the need for efficient tools to perform reliable quality control. It is shown here ...

    • In Situ Calibration of Optode-Based Oxygen Sensors 

      Uchida, Hiroshi; Kawano, Takeshi; Kaneko, Ikuo; Fukasawa, Masao (American Meteorological Society, 2008)
      Eleven optode-based oxygen sensors were used for shipboard hydrographic casts in the North Pacific. Oxygen data from the optode sensors were compared with high-quality oxygen data obtained with discrete water samples, and ...

    • Impact of the Incremental Analysis Updates on a Real-Time System of the North Atlantic Ocean 

      Benkiran, M.; Greiner, E. (American Meteorological Society, 2008)
      Incremental analysis updates (IAUs) are a procedure by which analysis increments can be incorporated into a model hindcast and forecast in a smooth manner. It is similar to nudging but has a better response, particularly ...

    • A Method for Processing Acoustic Doppler Current Profiler Velocity Data from Towed, Undulating Vehicles 

      Pan, Jiayi; Jay, David A. (American Meteorological Society, 2008)
      The utility of the acoustic Doppler current profiler (ADCP) for sampling small time and space scales of coastal environments can be enhanced by mounting a high-frequency (1200 kHz) ADCP on an oscillating towed body. This ...

    • Platform Motion Effects on Measurements of Turbulence and Air–Sea Exchange over the Open Ocean 

      Miller, Scott D.; Hristov, Tihomir S.; Edson, James B.; Friehe, Carl A. (American Meteorological Society, 2008)
      Platform motion contaminates turbulence statistics measured in the surface layer over the ocean and therefore adds uncertainty to the understanding and parameterization of air?sea exchange. A modification to the platform ...

    • Determining Thorpe Scales from Ship-Lowered CTD Density Profiles 

      Gargett, Ann; Garner, Teresa (American Meteorological Society, 2008)
      CTD measurements taken as an integral part of oceanographic cruises could provide valuable information on spatial locations and time variability of significant shear-generated mixing in the ocean interior if used routinely ...

    • Evaluation of the Flow Distortion around the Campbell Scientific CSAT3 Sonic Anemometer Relative to Incident Wind Direction 

      Friebel, Harry C.; Herrington, Thomas O.; Benilov, Alexander Y. (American Meteorological Society, 2009)
      In June 2002, a high-frequency air?sea momentum system was deployed in the surf zone for 3 days as part of an experiment to quantify air?sea momentum transfer when the wind and wave direction were at angles. The system ...

    • Comparison of Envisat ASAR Ocean Wave Spectra with Buoy and Altimeter Data via a Wave Model 

      Li, Jian-Guo; Holt, Martin (American Meteorological Society, 2009)
      The Advanced Synthetic Aperture Radar (ASAR) on board the Envisat satellite is an important resource for observation of global ocean surface wave spectra. However, assessment of this valuable dataset is not straightforward ...

    • Application of the Multigrid Data Assimilation Scheme to the China Seas’ Temperature Forecast 

      Li, Wei; Xie, Yuanfu; He, Zhongjie; Han, Guijun; Liu, Kexiu; Ma, Jirui; Li, Dong (American Meteorological Society, 2008)
      Correlation scales have been used in the traditional scheme of three-dimensional variational data assimilation (3DVAR) to estimate the background (or first guess) error covariance matrix (the ? matrix in brief) for the ...

    • Convective Boundary Layer Depth Estimation from Wind Profilers: Statistical Comparison between an Automated Algorithm and Expert Estimations 

      Bianco, Laura; Wilczak, James M.; White, Allen B. (American Meteorological Society, 2008)
      A previous study showed success in determining the convective boundary layer depth with radar wind-profiling radars using fuzzy logic methods, and improvements to the earlier work are discussed. The improved method uses ...