Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 2641-2660 of 5084
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Extracting Rainfall Rates from X-band CDR Radar Data by Using Differential Propagation Phase Shift
(American Meteorological Society, 1991)In this paper, the method of using differential propagation phase shift ?Φ to measure rain rate R from X-band circular depolarization ratio (CDR) radar data is presented. The principle of this method is based on the fact ... -
Polynomial Chaos Quantification of the Growth of Uncertainty Investigated with a Lorenz Model
(American Meteorological Society, 2010)A time-dependent physical model whose initial condition is only approximately known can predict the evolving physical state to only within certain error bounds. In the prediction of weather, as well as its ocean counterpart, ... -
A Vector Geometry–Based Eddy Detection Algorithm and Its Application to a High-Resolution Numerical Model Product and High-Frequency Radar Surface Velocities in the Southern California Bight
(American Meteorological Society, 2010)Automated eddy detection methods are fundamental tools to analyze eddy activity from the large datasets derived from satellite measurements and numerical model simulations. Existing methods are either based on the distribution ... -
Identifying and Estimating Biases between XBT and Argo Observations Using Satellite Altimetry
(American Meteorological Society, 2010)A methodology is developed to identify and estimate systematic biases between expendable bathythermograph (XBT) and Argo observations using satellite altimetry. Pseudoclimatological fields of isotherm depth are computed ... -
A Conductivity Sensor for Nearbed Sediment Concentration Profiling
(American Meteorological Society, 2010)A new sensor that measures the vertical profile of nearbed sediment concentration is described. The conductivity-based sensor is composed of eight electrode pairs separated in the vertical by 2.5 ? 10?3 m. Electrode pairs ... -
A Portable Airborne Scanning Lidar System for Ocean and Coastal Applications
(American Meteorological Society, 2009)A portable compact airborne scanning lidar system based on the Riegl LMS-Q240i has been developed and its functionality demonstrated for oceanographic and coastal measurements. Differential GPS (DGPS) and an inertial ... -
Vertical Water Velocities from Underwater Gliders
(American Meteorological Society, 2010)The underwater glider is set to become an important platform for oceanographers to gather data within oceans. Gliders are usually equipped with a conductivity?temperature?depth (CTD) sensor, but a wide range of other sensors ... -
Extracting Meaningful Information from Uncalibrated Backscattered Echo Intensity Data
(American Meteorological Society, 2009)The authors present an original method for the analysis of acoustic Doppler current profiler (ADCP) echo intensity profiles measured in the ocean, especially when no calibration has been performed. This study is based on ... -
Gas Bubbles as Oceanographic Tracers
(American Meteorological Society, 2010)Air bubbles can be used as oceanographic tracers that indicate the strength of a downwelling current by which they are subducted. In a tidal front in the Fraser Estuary, British Columbia, Canada, vertical currents of up ... -
Analysis and Forecasting of Sea Ice Conditions with Three-Dimensional Variational Data Assimilation and a Coupled Ice–Ocean Model
(American Meteorological Society, 2010)A three-dimensional variational data assimilation (3DVAR) system has been developed to provide analyses of the ice?ocean state and to initialize a coupled ice?ocean numerical model for forecasting sea ice conditions. This ... -
Acoustic Detection of Oceanic Double-Diffusive Convection: A Feasibility Study
(American Meteorological Society, 2010)The feasibility of using high-frequency acoustic scattering techniques to map the extent and evolution of the diffusive regime of double-diffusive convection in the ocean is explored. A scattering model developed to describe ... -
Mapping Circulation in the Kuroshio Extension with an Array of Current and Pressure Recording Inverted Echo Sounders
(American Meteorological Society, 2010)The Kuroshio Extension System Study (KESS) aimed to quantify processes governing the variability of and the interaction between the Kuroshio Extension and the recirculation gyre. To meet this goal, a suite of instrumentation, ... -
Uncertainty in Scatterometer-Derived Vorticity
(American Meteorological Society, 2010)A more versatile and robust technique is developed for determining area-averaged surface vorticity based on vector winds from swaths of remotely sensed wind vectors. This technique could also be applied to determine the ... -
Error Analysis and Sampling Strategy Design for Using Fixed or Mobile Platforms to Estimate Ocean Flux
(American Meteorological Society, 2010)For estimating lateral flux in the ocean using fixed or mobile platforms, the authors present a method of analyzing the estimation error and designing the sampling strategy. When an array of moorings is used, spatial ... -
Comparison of C-Band Scatterometer CMOD5.N Equivalent Neutral Winds with ECMWF
(American Meteorological Society, 2009)This article describes the evaluation of a C-band geophysical model function called C-band model 5.N (CMOD5.N). It is used to provide an empirical relation between backscatter as sensed by the spaceborne European Remote ... -
Calibration, Response, and Hysteresis in Deep-Sea Dissolved Oxygen Measurements
(American Meteorological Society, 2010)Accurately measuring the dissolved oxygen concentration in the ocean has been the subject of considerable research. Traditionally, the calibration and correction of profiling oxygen measurements has centered on static, ... -
Validation of Surface Current Measurements in the Northern Adriatic Sea from High-Frequency Radars
(American Meteorological Society, 2010)The performances of a shore-based high-frequency (HF) radar network deployed along the coast of the Venice lagoon (northern Adriatic Sea) are discussed based on a comparison with a single bottom-mounted ADCP deployed in ... -
A New Statistical Modeling Approach to Ocean Front Detection from SST Satellite Images
(American Meteorological Society, 2010)Ocean fronts are narrow zones of intense dynamic activity that play an important role in global ocean?atmosphere interactions. Owing to their highly variable nature, both in space and time, they are notoriously difficult ... -
Observing Directional Properties of Ocean Swell with an Acoustic Doppler Current Profiler (ADCP)
(American Meteorological Society, 2010)Acoustic Doppler current profilers (ADCPs) are widely used for routine measurements of ocean currents and waves in coastal environments. These instruments have the basic capability to measure surface wave frequency?directional ... -
An Open Ocean Trial of Controlled Upwelling Using Wave Pump Technology
(American Meteorological Society, 2010)In 1976, John D. Isaacs proposed to use wave energy to invert the density structure of the ocean and pump deep, nutrient-rich water into the sunlit surface layers. The basic principle is simple: a length of tubing attached ...