Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 581-600 of 5084
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What Can We Expect from Data Assimilation for Air Quality Forecast? Part I: Quantification with Academic Test Cases
(American Meteorological Society, 2018)Data assimilation has been successfully used for meteorology for many years and is now used more and more for atmospheric composition issues (air quality analysis and forecast). The data assimilation of pollutants remains ... -
WMO Interlaboratory Comparison in Europe with Loops Linkage and Data Processing
(American Meteorological Society, 2019)This article describes the interlaboratory comparison (ILC) of meteorological and hydrological calibration laboratories in the field of temperature (?30° to 40°C), humidity (10%?95% RH at room temperature), and pressure ... -
Navigation Algorithm Applied to the Bit of Underwater Horizontal Directional Drilling in a Vibration Environment
(American Meteorological Society, 2019)In its working state, the bit used in underwater horizontal directional drilling (UHDD) produces a high-frequency vibration that can affect accuracy of navigation. We designed a low-pass filter with linear phase on the ... -
A Dynamic Flight Model for Slocum Gliders and Implications for Turbulence Microstructure Measurements
(American Meteorological Society, 2019)The turbulent dissipation rate ε is a key parameter to many oceanographic processes. Recently, gliders have been increasingly used as a carrier for microstructure sensors. Compared to conventional ship-based methods, ... -
Regional Swell Transformation by Backward Ray Tracing and SWAN
(American Meteorological Society, 2018)Beach erosion and wave-induced flooding models are often initialized in O(10)-m depth, seaward of the surfzone, with wave conditions estimated from regional nonlinear spectral wave models [e.g., Simulating Waves Nearshore ... -
An Automated Velocity Dealiasing Scheme for Radar Data Observed from Typhoons and Hurricanes
(American Meteorological Society, 2018)Accurate and automated dealiasing of radar data is important for data interpretation and downstream applications such as numerical weather prediction (NWP) models. In this paper an improved radial velocity dealiasing scheme ... -
An Integrated Approach to Weather Radar Calibration and Monitoring Using Ground Clutter and Satellite Comparisons
(American Meteorological Society, 2018)The stability and accuracy of weather radar reflectivity calibration are imperative for quantitative applications, such as rainfall estimation, severe weather monitoring and nowcasting, and assimilation in numerical weather ... -
Nonlinear Wave Ensemble Averaging in the Gulf of Mexico Using Neural Networks
(American Meteorological Society, 2018)Artificial neural networks (ANNs) applied to nonlinear wave ensemble averaging are developed and studied for Gulf of Mexico simulations. It is an approach that expands the conservative arithmetic ensemble mean (EM) from ... -
Fixed Echo Rejection in Sodar Using Noncoherent Matched Filter Detection and Gaussian Mixture Model–Based Postprocessing
(American Meteorological Society, 2018)Doppler sodar is a technology used for acoustic-based remote sensing of the lower planetary boundary layer. Sodars are often used to measure wind profiles; however, they suffer from problems caused by noise (both acoustic ... -
Evaluating the Reliability of the U.S. Cooperative Observer Program Precipitation Observations for Extreme Events Analysis Using the LTAR Network
(American Meteorological Society, 2018)The detection and attribution of changes in precipitation characteristics relies on dense networks of rain gauges. In the United States, the COOP network is widely used for such studies even though there are reported ... -
River Discharge and Bathymetry Estimation from Inversion of Surface Currents and Water Surface Elevation Observations
(American Meteorological Society, 2018)We developed an approach for estimating river discharge and water depth from measurements of surface velocity and water surface elevation, based on analytical velocity?depth and velocity?slope relationships derived from ... -
Electrified Cloud Areas Observed in the SHV and LDR Radar Modes
(American Meteorological Society, 2018)Strong in-cloud electric fields align ice particles that can be observed with polarization diversity radars. Radar data collected in the simultaneous transmission mode, wherein horizontally and vertically polarized waves ... -
Measuring Gravity Wave Parameters from a Nighttime Satellite Low-Light Image Based on Two-Dimensional Stockwell Transform
(American Meteorological Society, 2018)Atmospheric gravity waves are a kind of mesoscale disturbance, commonly found in the atmospheric system, that plays a key role in a series of mesospheric dynamic processes. When propagating to the upper atmosphere, the ... -
On the Spatial Scales to be Resolved by the Surface Water and Ocean Topography Ka-Band Radar Interferometer
(American Meteorological Society, 2019)The Surface Water and Ocean Topography (SWOT) mission aims to measure the sea surface height (SSH) at a high spatial resolution using a Ka-band radar interferometer (KaRIn). The primary oceanographic objective is to ... -
Ocean Acoustic Tomography in the North Atlantic
(American Meteorological Society, 2018)An objective mapping exercise simulating observations of temperature in the North Atlantic Ocean was used to assess the resolution capabilities of ocean acoustic tomography in combination with Argo floats. A set of basis ... -
Intercomparison of Mixing Layer Heights from the National Weather Service Ceilometer Test Sites and Collocated Radiosondes
(American Meteorological Society, 2018)A network of automated weather stations (AWS) with ceilometers can be used to detect sky conditions, aerosol dispersion, and mixing layer heights, in addition to the routine surface meteorological parameters (temperature, ... -
A Remote Sensing and Atmospheric Correction Method for Assessing Multispectral Radiative Transfer through Realistic Atmospheres and Clouds
(American Meteorological Society, 2018)The ability to quickly and accurately model actual atmospheric conditions is essential to remote sensing analyses. Clouds present a particularly complex challenge, as they cover up to 70% of Earth?s surface, and their ... -
A Real-Time Online Data Product that Automatically Detects Easterly Gap-Flow Events and Precipitation Type in the Columbia River Gorge
(American Meteorological Society, 2018)AbstractA real-time, hourly updated, online graphical data product that displays the depth and strength of easterly gap flow in the Columbia River Gorge using a 915-MHz Doppler wind profiler is presented. During precipitation ... -
Comparative Evaluation of Snowfall Retrievals from the CloudSat W-band Radar Using Ground-Based Weather Radars
(American Meteorological Society, 2018)AbstractInstantaneous liquid-equivalent snowfall rates S retrieved from CloudSat W-band cloud radar reflectivity Ze measurements are compared to estimates of S from operational Weather Surveillance Radar-1988 Doppler ... -
Quantifying Highly Variable Air–Sea Momentum Flux Using Wavelet Analysis
(American Meteorological Society, 2018)AbstractSurface wind stress is a crucial driver of upper-ocean processes, impacting air?sea gas flux, wind-wave development, and material transport. Conventional eddy covariance (EC) processing requires imposing a fixed ...