Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 681-700 of 5084
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Observing Finescale Oceanic Velocity Structure with an Autonomous Nortek Acoustic Doppler Current Profiler
(American Meteorological Society, 2017)AbstractThis paper describes the instrumentation and techniques for long-term targeted observation of the centimeter-scale velocity structure within the oceanic surface boundary layer, made possible by the recent developments ... -
An Objective Method for Determining Ocean Mixed Layer Depth with Applications to WOCE Data
(American Meteorological Society, 2017)AbstractA new method is developed to identify the mixed layer depth (MLD) from individual temperature or density profiles. A relative variance profile is obtained that is the ratio between the standard deviation and the ... -
A Method to Quantify Bedform Height and Asymmetry from a Low-Mounted Sidescan Sonar
(American Meteorological Society, 2018)AbstractRotary sidescan sonars are widely used to image the seabed given their high temporal and spatial resolution. This high resolution is necessary to resolve bedform dynamics and evolution; however, sidescan sonars do ... -
Do High-Frequency Radars Measure the Wave-Induced Stokes Drift?
(American Meteorological Society, 2018)ABSTRACTHigh-frequency (HF) radars remotely measure ocean near-surface currents based on the Doppler shift of electromagnetic waves backscattered by surface gravity waves with half the electromagnetic wavelength, called ... -
Smartphone Pressure Collection and Bias Correction Using Machine Learning
(American Meteorological Society, 2018)AbstractOver half a billion smartphones worldwide are now capable of measuring atmospheric pressure, providing a pressure network of unprecedented density and coverage. This paper describes novel approaches for the collection, ... -
Evaluation of Accuracy of Chinese AMDAR Data for 2015
(American Meteorological Society, 2018)AbstractTwo comparative studies have been performed to evaluate the accuracy of Chinese Aircraft Meteorological Data Relay (AMDAR) weather reports. The comparison between AMDAR reports and radiosonde observations shows ... -
Effect of Assimilating Himawari-8 Atmospheric Motion Vectors on Forecast Errors over East Asia
(American Meteorological Society, 2018)AbstractIn this study, the effect of assimilating Himawari-8 (HIMA-8) atmospheric motion vectors (AMVs) on forecast errors in East Asia is evaluated using observation system experiments based on the Weather Research and ... -
Accounting for Gravitational Attraction and Loading Effects from Land Ice on Absolute Sea Level
(American Meteorological Society, 2018)AbstractGravitational attraction and loading (GAL) effects associated with ongoing long-term changes in land ice are expected to cause spatially varying trends in absolute sea level ?, as measured by satellite altimeters. ... -
Measurements of Directional Wave Spectra and Wind Stress from a Wave Glider Autonomous Surface Vehicle
(American Meteorological Society, 2017)AbstractMethods for measuring waves and winds from a Wave Glider autonomous surface vehicle (ASV) are described and evaluated. The wave method utilizes the frequency spectra of orbital velocities measured by GPS, and the ... -
An Assessment of the XBT Fall-Rate Equation in the Southern Ocean
(American Meteorological Society, 2018)AbstractIn this study a set of 157 collocated XBT (DB/T7 type) and CTD stations distributed across three different regions of the Southern Ocean is explored using the manufacturer?s fall-rate equation (FRE), which is a ... -
A Novel Instrument for Real-Time Measurement of Attenuation of Weather Radar Radome Including Its Outer Surface. Part II: Applications
(American Meteorological Society, 2018)AbstractThe concept and theory of a novel instrument to characterize the radio frequency performance of a radome under different conditions, including dirtiness, wetness, and varying temperature, was presented and discussed ... -
Advances in Chinese Dual-Polarization and Phased-Array Weather Radars: Observational Analysis of a Supercell in Southern China
(American Meteorological Society, 2018)AbstractIn the summer of 2016, one phased-array radar and two polarimetric weather radars, representative of advancing radar technology in use in China, jointly collected data in the Foshan area to study severe convective ... -
Assimilation of Radar Radial Velocity and Reflectivity, Satellite Cloud Water Path, and Total Precipitable Water for Convective-Scale NWP in OSSEs
(American Meteorological Society, 2017)AbstractIn this study, the ensemble of three-dimensional variational data assimilation (En3DVar) method for convective-scale weather is adopted and evaluated using an idealized supercell storm simulated by the Weather ... -
A Novel Instrument for Real-Time Measurement of Attenuation of Weather Radar Radome Including Its Outer Surface. Part I: The Concept
(American Meteorological Society, 2018)AbstractThis paper presents a unique instrument for characterizing the impact of wet radomes in radar systems. The proposed technique enables full radio frequency (RF) characterization of the radome, by evaluating its ... -
Community Global Observing System Simulation Experiment (OSSE) Package (CGOP): Perfect Observations Simulation Validation
(American Meteorological Society, 2017)AbstractThe simulation of observations?a critical Community Global Observing System Simulation Experiment (OSSE) Package (CGOP) component?is validated first by a comparison of error-free simulated observations for the first ... -
An Observing System Simulation Experiment for the Calibration and Validation of the Surface Water Ocean Topography Sea Surface Height Measurement Using In Situ Platforms
(American Meteorological Society, 2017)AbstractThe wavenumber spectrum of sea surface height (SSH) is an important indicator of the dynamics of the ocean interior. While the SSH wavenumber spectrum has been well studied at mesoscale wavelengths and longer, using ... -
Estimating River Bathymetry from Surface Velocity Observations Using Variational Inverse Modeling
(American Meteorological Society, 2017)AbstractAccurate river bathymetry characterization is important to understanding all aspects of the riparian environment and provides crucial information for ensuring the safe passage of vessels and guiding channel maintenance ... -
Evaluating Humidity and Sea Salt Disturbances on CO2 Flux Measurements
(American Meteorological Society, 2018)AbstractGlobal oceans are an important sink of atmospheric carbon dioxide (CO2). Therefore, understanding the air?sea flux of CO2 is a vital part in describing the global carbon balance. Eddy covariance (EC) measurements ... -
On the Use of Radiosondes in Freezing Precipitation
(American Meteorological Society, 2018)AbstractRadiosonde observations are used the world over to provide critical upper-air observations of the lower atmosphere. These observations are susceptible to errors that must be mitigated or avoided when identified. ... -
A Cross-Spectral Approach to Measure the Error Budget of the SWOT Altimetry Mission over the Ocean
(American Meteorological Society, 2017)AbstractThe future Surface Water Ocean Topography (SWOT) mission aims to observe water bodies and short-scale ocean surface topography with unprecedented spatial resolution and accuracy. However, the topography estimates ...