Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 621-640 of 5084
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Enhancing the Data Coverage in the Integrated Global Radiosonde Archive
(American Meteorological Society, 2018)AbstractThe Integrated Global Radiosonde Archive (IGRA) is a collection of historical and near-real-time radiosonde and pilot balloon observations from around the globe. Consisting of a foundational dataset of individual ... -
A Quality Control Procedure Based on Bending Angle Measurement Uncertainty for Radio Occultation Data Assimilation in the Tropical Lower Troposphere
(American Meteorological Society, 2018)AbstractThe fluctuation of radio occultation (RO) signals in the presence of refractivity irregularities in the moist lower troposphere results in uncertainties of retrieved bending angle and refractivity profiles. In this ... -
The NCAR–NOAA Global Hawk Dropsonde System
(American Meteorological Society, 2018)AbstractA new remotely controlled Airborne Vertical Atmospheric Profiling System (AVAPS) dropsonde system has been developed for and deployed on the NASA Global Hawk (GH) unmanned aircraft. Design, fabrication, and operation ... -
Numerical Simulations to Project Argo Float Positions in the Middepth and Deep Southwest Pacific
(American Meteorological Society, 2018)AbstractArgo float trajectories are simulated in the southwest Pacific basin (25°?45°S, 170°E?165°W) using velocity fields from a 1/12° Southern Ocean model and a Lagrangian particle tracking model programmed to represent ... -
TRMM Microwave Imager (TMI) Alignment and Along-Scan Bias Corrections
(American Meteorological Society, 2018)AbstractThe Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) dataset released by the Precipitation Processing System (PPS) has been updated to a final version following the decommissioning of the TRMM ... -
Basin-Scale Prediction of Sea Surface Temperature with Artificial Neural Networks
(American Meteorological Society, 2018)AbstractThe prediction of sea surface temperature (SST) on the basis of artificial neural networks (ANNs) can be viewed as complementary to numerical SST predictions, and it has fairly sustained in the recent past. However, ... -
Assimilation of Argo Temperature and Salinity Profiles Using a Bias-Aware EnOI Scheme for the Labrador Sea
(American Meteorological Society, 2018)AbstractIn this study, temperature and salinity profiles from Argo floats are assimilated into a coupled ice?ocean model over the North Atlantic Ocean and Arctic using an ensemble optimal interpolation (EnOI) scheme, with ... -
Two Methods for Correcting Range-Dependent Limitations of Lightning Mapping Arrays
(American Meteorological Society, 2018)AbstractLightning Mapping Arrays (LMAs) detect very high frequency (VHF) radiation produced by lightning as it propagates; however, VHF source detection efficiency drops off rapidly with range from the centers of the arrays, ... -
Convective Boundary Layer Depth Estimation from S-Band Dual-Polarization Radar
(American Meteorological Society, 2018)AbstractThis study investigates Bragg scatter signatures in dual-polarization radar observations, which are defined by low differential reflectivity values, as a proxy for convective boundary layer (CBL) depth. Using data ... -
Wind Speed Measured from Underwater Gliders Using Passive Acoustics
(American Meteorological Society, 2018)AbstractWind speed measurements are needed to understand ocean?atmosphere coupling processes and their effects on climate. Satellite observations provide sufficient spatial and temporal coverage but are lacking adequate ... -
Improved Estimation of Pollutant Emission Rate in an Ocean Pollutant Diffusion Model by the Application of Spline Interpolation with the Adjoint Method
(American Meteorological Society, 2018)AbstractThe spline interpolation method is applied to the inversion of the time-varying pollutant emission rate based on an ocean pollutant diffusion model with the adjoint method. A series of numerical experiments are ... -
Laboratory and Flight Tests of 2D Imaging Probes: Toward a Better Understanding of Instrument Performance and the Impact on Archived Data
(American Meteorological Society, 2018)AbstractTwo-dimensional (2D) imaging probes, such as the 2D stereo (2D-S) probe and the cloud imaging probe (CIP), are routinely used to provide in situ measurements of cloud particle properties. The basic measurement is ... -
A Regression-Free Rainfall Estimation Algorithm for Dual-Polarization Radars
(American Meteorological Society, 2018)AbstractIn this study a new radar rainfall estimation algorithm?rainfall estimation using simulated raindrop size distributions (RESID)?was developed. This algorithm development was based upon the recent finding that ... -
Surfzone State Estimation, with Applications to Quadcopter-Based Remote Sensing Data
(American Meteorological Society, 2018)AbstractA one-dimensional variational data assimilation (1DVar) method is presented based on the depth- and time-averaged alongshore-uniform surfzone wave and current equations, for simultaneous estimation of three uncertain ... -
A UAV–RTK Lidar System for Wave and Tide Measurements in Coastal Zones
(American Meteorological Society, 2018)AbstractA lightweight and low-cost unmanned aerial vehicle (UAV) system for coastal wave and tide measurements is developed. This system is based on an assembly of a multirotor UAV, a robotic lidar, an altitude and heading ... -
Depth-Average Velocity from Spray Underwater Gliders
(American Meteorological Society, 2018)AbstractThe depth-average velocity is routinely calculated using data from underwater gliders. The calculation is a dead reckoning, where the difference between the glider?s velocity over ground and its velocity through ... -
Scattering Calculations for Asymmetric Raindrops during a Line Convection Event: Comparison with Radar Measurements
(American Meteorological Society, 2018)AbstractTwo-dimensional video disdrometer (2DVD) data from a line convection rain event are analyzed using the method of moments surface integral equation (MoM-SIE) via drop-by-drop polarimetric scattering calculations at ... -
A Regional Thermohaline Inverse Method for Estimating Circulation and Mixing in the Arctic and Subpolar North Atlantic
(American Meteorological Society, 2018)AbstractA regional thermohaline inverse method (RTHIM) is presented that estimates velocities through the section bounding an enclosed domain and transformation rates resulting from interior mixing within the domain, given ... -
Development and Flight Test Results of a Small UAS Distributed Flush Airdata System
(American Meteorological Society, 2018)AbstractSmall unmanned aircraft systems (sUAS) have proven their effectiveness for measuring both the inertial and aircraft-relative wind. One of the more common aircraft-relative wind instruments is the multihole probe ... -
Observing Plumes and Overturning Cells with a New Coastal Bottom Drifter
(American Meteorological Society, 2018)AbstractA new platform, the Coastal Bottom Drifter, was designed and built to observe near-bottom environments in coastal regions. It is capable of observing properties by drifting near the bottom with a prescribed clearance ...