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RISThe Cospectral Gap and Turbulent Flux Calculations
Publisher: American Meteorological Society
Abstract: An alternative method to Fourier analysis is discussed for studying the scale dependence of variances and covariances in atmospheric boundary layer time series. Unlike Fourier decomposition, the scale dependence based on ...
Formulation of Turbulent Fluxes in the Stable Boundary Layer
Publisher: American Meteorological Society
Abstract: The mixing lengths for heat and momentum are computed from seven levels of eddy correlation data during the Cooperative Atmosphere?Surface Exchange Study-1999 (CASES-99). A number of formulations of the mixing length are ...
Quality Control and Flux Sampling Problems for Tower and Aircraft Data
Publisher: American Meteorological Society
Abstract: A series of automated tests is developed for tower and aircraft time series to identify instrumentation problems, flux sampling problems, and physically plausible but unusual situations. The automated procedures serve as ...
Subgrid Surface Fluxes in Fair Weather Conditions during TOGA COARE: Observational Estimates and Parameterization
Publisher: American Meteorological Society
Abstract: Bulk aerodynamic formulas are applied to meteorological data from low-altitude aircraft flights to obtain observational estimates of the subgrid enhancement of momentum, sensible heat, and latent heat exchange at the ...
Low-Level Wind Maxima and Structure of the Stably Stratified Boundary Layer in the Coastal Zone
Publisher: American Meteorological Society
Abstract: Rutan Aircraft Factory Long-EZ aircraft flew numerous low-level slant soundings on two summer days in 2001 off the northeastern coast of the United States. The soundings are analyzed here to study the nonstationary vertical ...
A New Drag Relation for Aerodynamically Rough Flow over the Ocean
Publisher: American Meteorological Society
Abstract: rom almost 7000 near-surface eddy-covariance flux measurements over the sea, the authors deduce a new air?sea drag relation for aerodynamically rough flow:Here u* is the measured friction velocity, and UN10 is the ...
Estimates of the 10-m Neutral Sea Surface Drag Coefficient from Aircraft Eddy-Covariance Measurements
Publisher: American Meteorological Society
Abstract: he 10-m neutral drag coefficient (CDN10) over the sea is calculated using a large observational dataset consisting of 5800 estimates of the mean flow and the fluxes from aircraft eddy-covariance measurements. The dataset ...
Formulation of the Sea Surface Friction Velocity in Terms of the Mean Wind and Bulk Stability
Publisher: American Meteorological Society
Abstract: ver 5000 aircraft eddy-covariance measurements from four different aircraft in nine different experiments are used to develop a simple model for the friction velocity over the sea. Unlike the widely used Coupled Ocean?Atmosphere ...
Sensible Heat Flux in Near-Neutral Conditions over the Sea
Publisher: American Meteorological Society
Abstract: he variation of the sea surface sensible heat flux is investigated using data from the Gulf of Tehuantepec Experiment (GOTEX) and from eight additional aircraft datasets representing a variety of surface conditions. This ...
Dependence of Turbulent and Mesoscale Velocity Variances on Scale and Stability
Publisher: American Meteorological Society
Abstract: The scale dependence of velocity variances is studied using data collected from a grassland site, a heather site, and four forested sites. The dependence of velocity variances on averaging time, used to define the fluctuation ...