Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 501-520 of 5084
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Decomposition of the Multimodal Multidirectional M2 Internal Tide Field
(American Meteorological Society, 2019)AbstractThe M2 internal tide field contains waves of various baroclinic modes and various horizontal propagation directions. This paper presents a technique for decomposing the sea surface height (SSH) field of the multimodal ... -
Use of the Earth’s Surface as a Reference to Correct Airborne Nadir-Looking Radar Radial Velocity Measurements for Platform Motion
(American Meteorological Society, 2019)AbstractA technique for correcting radar radial velocity Vr in airborne, nadir-pointing radar data using the surface of Earth as a reference is proposed and tested. Operating airborne Doppler radars requires correcting the ... -
Stochastic Spectral Method for Radar-Based Probabilistic Precipitation Nowcasting
(American Meteorological Society, 2019)AbstractNowcasts (short-term forecasts) of heavy rainfall causing flash floods are highly valuable in densely populated urban areas. In the Collaborative Adaptive Sensing of the Atmosphere (CASA) project, a high-resolution ... -
Forecast Sensitivity Observation Impact in the 4DVAR and Hybrid-4DVAR Data Assimilation Systems
(American Meteorological Society, 2019)AbstractIn this study, the observation impacts on 24-h forecast error reduction (FER), based on the adjoint method in the four-dimensional variational (4DVAR) data assimilation (DA) and hybrid-4DVAR DA systems coupled with ... -
Impact of Multiple Altimeter Data and Mean Dynamic Topography in a Global Analysis and Forecasting System
(American Meteorological Society, 2019)AbstractSatellite altimetry is one of the main sources of information used to constrain global ocean analysis and forecasting systems. In addition to in situ vertical temperature and salinity profiles and sea surface ... -
Evaluation of Low-Cost, Automated Lake Ice Thickness Measurements
(American Meteorological Society, 2019)AbstractClimate change is expected to decrease ice coverage and thickness globally while increasing the variability of ice coverage and thickness on midlatitude lakes. Ice thickness affects physical, biological, and chemical ... -
High-Resolution, Rapid-Scan Dual-Doppler Retrievals of Vertical Velocity in a Simulated Supercell
(American Meteorological Society, 2019)AbstractObservation system simulation experiments are used to evaluate different dual-Doppler analysis (DDA) methods for retrieving vertical velocity w at grid spacings on the order of 100 m within a simulated tornadic ... -
Physical Evaluation of GPM DPR Single- and Dual-Wavelength Algorithms
(American Meteorological Society, 2019)AbstractA physical evaluation of the rain profiling retrieval algorithms for the Dual-Frequency Precipitation Radar (DPR) on board the Global Precipitation Measurement (GPM) Core Observatory satellite is carried out by ... -
Numerical Calibration of a Low-Speed sUAS Flush Air Data System
(American Meteorological Society, 2019)AbstractA method using computational fluid dynamics to numerically calibrate a flush air data system is presented. A small unmanned aircraft system (sUAS) has been equipped with a flush air data system and experimentally ... -
A New Radar Scan Mode to Increase Clear-Air Velocity Data Coverage and Usability for Wind Analysis
(American Meteorological Society, 2019)AbstractBy using long pulses with extended dwell time, radar sensitivity is enhanced such that more clear-air returns are usable. This enhanced capability can increase clear-air data coverage and provide additional information ... -
Sea Level at the Coast from Video-Sensed Waves: Comparison to Tidal Gauges and Satellite Altimetry
(American Meteorological Society, 2019)AbstractNearshore complex and energetic hydrodynamic conditions make observing evolving processes during extreme and short-term events difficult. In particular, total sea levels at the coast are hard to measure with current ... -
Comparison of Eight Detection Algorithms for the Quantification and Characterization of Mesoscale Eddies in the South China Sea
(American Meteorological Society, 2019)AbstractNumerous oceanic mesoscale eddies occur in the South China Sea (SCS). The present study employs eight automatic eddy detection algorithms to identify these mesoscale eddies and compares the results. Eddy probabilities ... -
Uncertainty Quantification of Density and Stratification Estimates with Implications for Predicting Ocean Dynamics
(American Meteorological Society, 2019)AbstractWe present a statistical method for reconstructing continuous background density profiles that embeds incomplete measurements and a physically intuitive density stratification model within a Bayesian hierarchal ... -
A Modified Nonstationary Tidal Harmonic Analysis Model for the Yangtze Estuarine Tides
(American Meteorological Society, 2019)AbstractInfluenced by river discharge, the tidal properties of estuarine tides can be more complex than those of oceanic tides, which makes the tidal prediction less accurate when using a classical tidal harmonic analysis ... -
Rainfall Estimation Accuracy of a Nationwide Instantaneously Sampling Commercial Microwave Link Network: Error Dependency on Known Characteristics
(American Meteorological Society, 2019)AbstractCommercial microwave links are installed and maintained for the purpose of telecommunication. Hydrometeors between transmitting and receiving antennas cause the microwave signal to be attenuated. From signal ... -
Mitigation of Striping Noise in ATMS Calibration Counts by Symmetric Filters
(American Meteorological Society, 2019)AbstractGlobal observations from the Advanced Technology Microwave Sounder (ATMS) onboard the Suomi National Polar-Orbiting Partnership satellite are affected by striping-patterned noise. An optimal symmetric filter method ... -
Warm Rain Rates from AMSR-E 89-GHz Brightness Temperatures Trained Using CloudSat Rain-Rate Observations
(American Meteorological Society, 2019)AbstractCollocated CloudSat rain rates and Advanced Microwave Scanning Radiometer for EOS (AMSR-E) 89-GHz brightness temperature Tb retrievals allow for the development of an algorithm to estimate light, warm rain statistics ... -
Should Interpolation of Radar Reflectivity be Performed in Z or dBZ?
(American Meteorological Society, 2019)AbstractInterpolation of ground-based radar measurements is required when mapping data from their native spherical coordinates to a Cartesian grid. For reflectivity the question arises as to whether this processing should ... -
Design and Preliminary Testing of the Volcanic Ash Plume Receiver Network
(American Meteorological Society, 2019)AbstractThe presence of volcanic ash in the signal path between a GPS satellite and a ground-based receiver strongly correlates with a decrease in GPS signal strength. This effect has been seen in data collected from GPS ... -
Microscale Warming due to Poor Ventilation at Surface Observation Stations
(American Meteorological Society, 2019)AbstractScreen-level air temperature measurements at surface observation stations are influenced by local-site-scale factors. These local influences may affect global-scale climate change studies. This study investigated ...