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RISInvestigation of Clear Air Convective Structures in the PBL Using a Dual Doppler Radar and a Doppler Sodar
Publisher: American Meteorological Society
Abstract: In August 1979, the Dual Doppler Radar (Ronsard System) and the Doppler Sodar system of CNET were simultaneously used during an experiment on clear air convection. It provided the opportunity to develop a method for the ...
Atmospheric Mesoscale Spectra and Structure Functions of Mean Horizontal Velocity Fluctuations Measured with a Doppler Sodar Network
Publisher: American Meteorological Society
Abstract: Analyses of mean horizontal wind speed from four Doppler sodars separated by 15 to 38 km in the Gers region during the Mesogers 84 experiment gave information on the horizontal wind speed spectral behavior of the so-called ...
Doppler Sodar Analysis of Frontal Friction in Relation to Frontal Slope
Publisher: American Meteorological Society
Abstract: Doppler sodar information on the wind field in relation to frontal slope observed on reflectivity facsimile records was considered during Mesogers 84 experiment. The data have been analyzed to examine and quantify the ...
Evaluation of a Numerical Weather Forecast Model Using Boundary Layer Cloud-Top Temperature Retrieved from AVHRR
Publisher: American Meteorological Society
Abstract: This study concerns the evaluation of the boundary layer (BL) subgrid parameterization of a numerical weather forecast model on the synoptic scale. The method presented aims at separating the two possible origins of model ...
Characterization of the Cloud-Topped Boundary Layer at the Synoptic Scale Using AVHRR Observations during the SEMAPHORE Experiment
Publisher: American Meteorological Society
Abstract: Satellite platforms NOAA-11 and -12 Advanced Very High Resolution Radiometer (AVHRR) data are used during the daytime to study large sheets of stratocumulus over the North Atlantic Ocean. The application concerns an ...
Measuring Heat Flux and Structure Functions of Temperature Fluctuations with an Acoustic Doppler Sodar
Publisher: American Meteorological Society
Abstract: The vertical velocity variance during convective activity was measured with an acoustic Doppler sounder. Here we show that this technique provides measurement of the heat flux profile in the well-mixed surface layer and ...
A New Shipborne Microwave Refractometer for Estimating the Evaporation Flux at the Sea Surface
Publisher: American Meteorological Society
Abstract: After a brief description of humidity measurement and a short presentation of methods of microwave refractometry for evaporation flux, a new X-band refractometer system is presented. Based on a new design and a new material ...
A New Platform for the Determination of Air–Sea Fluxes (OCARINA): Overview and First Results
Publisher: American Meteorological Society
Abstract: he present paper describes a new type of floating platform that was specifically designed for estimating air?sea fluxes, investigating turbulence characteristics in the atmospheric surface boundary layer, and studying ...
Toward a Better Determination of Turbulent Air–Sea Fluxes from Several Experiments
Publisher: American Meteorological Society
Abstract: An accurate determination of turbulent exchanges between the ocean and the atmosphere is a prerequisite to identify and assess the mechanisms of interaction that control part of the variability in the two media over a wide ...
Cirene: Air–Sea Interactions in the Seychelles–Chagos Thermocline Ridge Region
Publisher: American Meteorological Society
Abstract: The Vasco?Cirene program explores how strong air?sea interactions promoted by the shallow thermocline and high sea surface temperature in the Seychelles?Chagos thermocline ridge results in marked variability at synoptic, ...