Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 2661-2680 of 5084
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Evaluating the Impact of the Number of Satellite Altimeters Used in an Assimilative Ocean Prediction System
(American Meteorological Society, 2010)The impact of the number of satellite altimeters providing sea surface height anomaly (SSHA) information for a data assimilation system is evaluated using two comparison frameworks and two statistical methodologies. The ... -
Calculating Reynolds Stresses from ADCP Measurements in the Presence of Surface Gravity Waves Using the Cospectra-Fit Method
(American Meteorological Society, 2009)Recently, the velocity observations of acoustic Doppler current profilers (ADCPs) have been successfully used to estimate turbulent Reynolds stresses in estuaries and tidal channels. However, the presence of surface gravity ... -
A Particle Filter for Inverse Lagrangian Prediction Problems
(American Meteorological Society, 2010)The authors present a numerical method for the inverse Lagrangian prediction problem, which addresses retrospective estimation of drifter trajectories through a turbulent flow, given their final positions and some knowledge ... -
Vertical Variability of Near-Surface Salinity in the Tropics: Consequences for L-Band Radiometer Calibration and Validation
(American Meteorological Society, 2010)Two satellite missions are planned to be launched in the next two years; the European Space Agency (ESA) Soil Moisture and Ocean Salinity (SMOS) and the National Aeronautics and Space Administration (NASA) Aquarius missions ... -
Mean Dynamic Topography of the Ocean Derived from Satellite and Drifting Buoy Data Using Three Different Techniques
(American Meteorological Society, 2009)Presented here are three mean dynamic topography maps derived with different methodologies. The first method combines sea level observed by the high-accuracy satellite radar altimetry with the geoid model of the Gravity ... -
Anomalous Spiking in Spectra of XCTD Temperature Profiles
(American Meteorological Society, 2009)The high vertical resolution of temperature and salinity measurements from expendable conductivity?temperature?depth (XCTD) instruments can be useful for inferring small-scale mixing rates in the ocean. However, XCTD ... -
Parameterization of an Iceberg Drift Model in the Barents Sea
(American Meteorological Society, 2009)The problem of parameter estimation is examined for an iceberg drift model of the Barents Sea. The model is forced by atmospheric reanalysis data from ECMWF and ocean and sea ice variables from the Hybrid Coordinate Ocean ... -
A Method to Estimate Three-Dimensional Thermal Structure from Satellite Altimetry Data
(American Meteorological Society, 2009)A new empirical method to estimate mesoscale three-dimensional oceanic thermal structures from near-real-time satellite altimetry data is presented. The method uses a two-layer model with a novel set of empirical parameters ... -
Robust Estimations of Current Velocities with Four-Beam Broadband ADCPs
(American Meteorological Society, 2009)An extended explanation of the hypothesis and equations traditionally used to transform between four-beam ADCP radial beam velocities and current velocity components is presented. This explanation includes a dissertation ... -
Estimation and Assessment of Errors Related to Antenna Pattern Distortion in CODAR SeaSonde High-Frequency Radar Ocean Current Measurements
(American Meteorological Society, 2009)A simulation-based investigation of errors in HF radar?derived, near-surface ocean current measurements is presented. The simulation model is specific to Coastal Ocean Dynamics Application Radar (CODAR) SeaSonde radar ... -
Measurements of Sea Surface Height Variability in the Eastern South Atlantic from Pressure Sensor–Equipped Inverted Echo Sounders: Baroclinic and Barotropic Components
(American Meteorological Society, 2009)Variability in sea surface height (SSH) can be decomposed into two contributions: one from changes in mass in the water column (barotropic) and the other from purely steric changes (baroclinic). Both contributions can be ... -
Accuracy of the IMET Sensor Package in the Subtropics
(American Meteorological Society, 2009)The accuracies of the meteorological sensors (air temperature, relative humidity, barometric pressure, near-surface temperature, longwave and shortwave radiation, and wind speed and direction) that compose the Improved ... -
Remote Real-Time Video-Enabled Docking for Underwater Autonomous Platforms
(American Meteorological Society, 2009)One of the key challenges in the development and implementation of ocean observatories is sustained observations over relevant temporal and spatial scales. Autonomous underwater vehicles (AUVs) have demonstrated their ... -
AERONET-OC: A Network for the Validation of Ocean Color Primary Products
(American Meteorological Society, 2009)The ocean color component of the Aerosol Robotic Network (AERONET-OC) has been implemented to support long-term satellite ocean color investigations through cross-site consistent and accurate measurements collected by ... -
XBT Temperature Errors during French Research Cruises (1999–2007)
(American Meteorological Society, 2009)Data from French cruises in 1999?2007, a period during which Deep Blue (DB) or T7 expendable bathythermographs (XBTs) were deployed, and for which ancillary temperature data are available in the northeast Atlantic and ... -
Rainfall and Clutter Discrimination by Means of Dual-linear Polarization Radar Measurements
(American Meteorological Society, 1991)The presence of undetected mixed-phase precipitation or superimposed intense clutter can cause serious errors in the estimation of rainfall rate and other parameters of precipitation occurring in the radar scattering volume. ... -
Acoustical Measurement of Nonlinear Internal Waves Using the Inverted Echo Sounder
(American Meteorological Society, 2009)The performance of pressure sensor?equipped inverted echo sounders for monitoring nonlinear internal waves is examined. The inverted echo sounder measures the round-trip acoustic travel time from the sea floor to the sea ... -
Effect of Finite Spatial Resolution on the Turbulent Energy Spectrum Measured in the Coastal Ocean Bottom Boundary Layer
(American Meteorological Society, 2009)The effect of finite spatial resolution on the measured energy spectrum is examined via a parametric study using in situ particle image velocimetry (PIV) measurements performed in the bottom boundary layer on the Atlantic ... -
Pacific Hindcast Performance of Three Numerical Wave Models
(American Meteorological Society, 2009)Although mean or integral properties of wave spectra are typically used to evaluate numerical wave model performance, one must look into the spectral details to identify sources of model deficiencies. This creates a ... -
Quality Control of Surface Wave Data Estimated from Low Signal-to-Noise Ratio HF Radar Doppler Spectra
(American Meteorological Society, 2009)Ocean wave spectra estimated by high-frequency (HF) radar are very sensitive to the noise of Doppler spectra. The method for estimating wave spectra has been improved. This method is a nonlinear inversion and can be applied ...