California coastal offshore transport and diffusion experiments meteorological conditions and data

Four series of tracer experiments have been performed to parameterize an overwater-coastal transport and diffusion model. The experiment were carried out in the winter and summer near Ventura, CA and Pismo beach, CA. The tracer gas SF6 was released from the research ship RV/Acania, which also collected and extensive amount of overwater meteorological data. This report contains descriptions of all experiments, the overwater meteorological data, and calculated meteorological parameters that are needed to characterize the transport and diffusion. (Author)Prepared for: Outer Continental Shelf Office, Minerals Management Service, Los Angeles, CA.N6600l82WROOO17Approved for public release; distribution is unlimited.Approved for public release; distribution is unlimited

Offshore transport and dispersion in the California Coastal Region-BLM III NPS data summary

The third in a series of tracer measurements of overwater transport and diffusion has been completed. This report includes the meteorological data obtained aboard the RV/Acania. Analyses of radiosonde data to yield mixed layer parameters for mixed layer assessment is also included. (Author)Outer Continental Shelf Office Bureau of Land Management Los Angeles, CaliforniaApproved for public release; distribution is unlimited

Calculation of optical extinction from aerosol spectral data

Applied Optics, Volume 20, No. 22, pp. 3951-3957 (15 November 1981)A major overwater experiment, MAGAT-80, has been undertaken to verify the use of aerosol spectrometers to calculate optical extinction in the marine boundary layer. Techniques for data averaging and for extrapolation to large particle sizes are described. Coincident optical, aerosol, and meteorological measurements by ship, aircraft, and an overwater optical range show that aerosol spectra can be used to predict extinction to within 40%

Superconducting thin-film detector of nuclear particles

The article of record as published may be found at http://dx.doi.org/10.1063/1.1660704Superconducting films of tin and indium on supporting substrates have functioned successfully as detectors of individual nuclear particles. The films are sufficiently thin and narrow that individual a-particle impacts initiate superconducting to normal transitions which spread, in the presence of a transport current, to span a full film cross section. The transitions are ob- served by means of the ir drop produced by a transport current. For low current densities self-terminating voltage pulses of a few nsec duration are observed. At higher current densi- ties the boundaries of a normal region initiated by an O! particle propagate by Joule heating to the ends of the film. The range of the 5. 3-MeV a particles utilized for these experiments greatly exceeds the O. 1 J.l. m thickness of the films and the resulting deposition of energy in the substrate affects the response of any film which is in direct contact with its substrate. The introduction of a thin thermally insulating layer of varnish between the film and its sub- strate, which in these experiments was either glass or crystalline quartz, increases the ther- mal decay constant to the extent that the film is thermally isolated from its substrate for a period comparable to that of pulse formation. The variation of count rate with film current has been studied and is shown to be consistent with the variation of critical current density along the length of the film. This model, coupled with classical heat diffusion within the film, accounts for the observed behavior of the thermally isolated films.USDO

Naval Postgraduate School Shipboard and Aircraft Meteorological Equipment

The Naval Postgraduate School Environmental Physics Group performs field experiments with both ships and aircraft. Details of the equipment used and calibration procedures are presented.Naval Environmental Prediction Research Facility, Monterey, C

Comparison of overwater stability classification schemes with measured wind direction variability

Schemes for assessing atmospheric stability are described and a modification to the Pasquill scheme to parameterize it for the overwater regime is developed. The various schemes are compared to measured values of the wind direction standard deviation. The results are location specific, applying only to the California channel islands area. (Author)Outer Continental Shelf Division, Bureau of Land Management, LosAnaeles CANo. AA85l-IAO-43Approved for public release; distribution is unlimited.Approved for public release; distribution is unlimited

Verification of the bulk model for calculations of the overwater index of refraction structure function, CN²

Prepared for: Naval Environmental Prediction Research Facility, Monterey, California 93940Overwater measurements of mean and fluctuating parameters have been made coincident with optical scintillation measurements. These data have been used to verify the NPS bulk aerodynamic model for calculating the index of refraction structure function, CN²· The average disagreement between calculated and measured values was 33% verifying the validity of the model. IR measured sea surface temperatures cannot be used in the model and this is discussed.Approved for public release; distribution is unlimited

Offshore transport and diffusion in the Los Angeles Bight - 2 NPS data summary

The second in a series of tracer measurements of overwater transport and diffusion has been completed. This report includes the meteorological data obtained aboard the RV/Acania. Analyses of radiosonde data to yield mixed layer parameters for mixed layer assessment is also included. (Author)Outer Continental Shelf Division Bureau of Land Management Los Angeles, CaliforniaApproved for public release; distribution is unlimited

Study of the production and dynamics of marine aerosols : A contribution to the EUROTRAC subproject ASE

The aim of the research is to yield a description of the factors determining aerosol production, dynamics and deposition in the marine atmospheric surface layer through experimental work in an air/water tunnel and numerical modellin