Journal of Atmospheric and Oceanic Technology: Recent submissions

Now showing items 1921-1940 of 5084

    • A Fuzzy Logic Algorithm for the Separation of Precipitating from Nonprecipitating Echoes Using Polarimetric Radar Observations 

      Gourley, Jonathan J.; Tabary, Pierre; Parent du Chatelet, Jacques (American Meteorological Society, 2007)
      A fuzzy logic algorithm has been developed for the purpose of segregating precipitating from nonprecipitating echoes using polarimetric radar observations at C band. Adequate polarimetric descriptions for each type of ...

    • The Atmospheric Radiation Measurement Program Cloud Profiling Radars: Second-Generation Sampling Strategies, Processing, and Cloud Data Products 

      Kollias, Pavlos; Miller, Mark A.; Luke, Edward P.; Johnson, Karen L.; Clothiaux, Eugene E.; Moran, Kenneth P.; Widener, Kevin B.; Albrecht, Bruce A. (American Meteorological Society, 2007)
      The U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Program operates millimeter-wavelength cloud radars in several climatologically distinct regions. The digital signal processors for these radars were ...

    • Shallow Angle Wave Profiling Lidar 

      Belmont, M. R.; Horwood, J. M. K.; Thurley, R. W. F.; Baker, J. (American Meteorological Society, 2007)
      A lidar scanning system is described that is primarily designed to measure sea wave shape. The device is capable of measuring real-time spatial profiles over distances of hundreds of meters, and as the lidar must inevitably ...

    • Measurement of Scalar Variance Dissipation from Lagrangian Floats 

      D’Asaro, Eric A.; Lien, Ren-Chieh (American Meteorological Society, 2007)
      Simultaneous measurements of temperature, salinity, their vertical gradients, and the vertical gradient of velocity across a 1.4-m-long Lagrangian float were used to investigate the accuracy with which the dissipation of ...

    • Spatial Mapping of Time-Variable Errors in Jason-1 and TOPEX/Poseidon Sea Surface Height Measurements 

      Ponte, Rui M.; Wunsch, Carl; Stammer, Detlef (American Meteorological Society, 2007)
      Fitting ocean models to altimeter sea surface height (SSH) measurements requires knowledge of instrument noise (radar noise, sea state bias, path delay corrections, and orbit errors) and ?representation? errors related to ...

    • Variational Pseudo-Multiple-Doppler Wind Retrieval in the Vertical Plane for Ground-Based Mobile Radar Data 

      Weiss, Christopher C.; Bluestein, Howard B.; Conzemius, Robert; Fedorovich, Evgeni (American Meteorological Society, 2007)
      A variational procedure is developed that utilizes mobile ground-based range?height indicator (RHI) Doppler radar velocity data for the synthesis of two-dimensional, RHI plane wind vectors. The radial component winds are ...

    • Signature of Lighthouses, Ships, and Small Islands in Altimeter Waveforms 

      Tournadre, J. (American Meteorological Society, 2007)
      High-rate (20 Hz) altimeter echo waveforms are particularly sensitive to small-scale changes of surface backscatter and they contain a wealth of information on the sea surface. A detailed analysis of these waveforms often ...

    • A Pressure-Sphere Anemometer for Measuring Turbulence and Fluxes in Hurricanes 

      Eckman, Richard M.; Dobosy, Ronald J.; Auble, David L.; Strong, Thomas W.; Crawford, Timothy L. (American Meteorological Society, 2007)
      Turbulence and air-surface exchange are important factors throughout the life cycle of a tropical cyclone. Conventional turbulence instruments are not designed to function in the extreme environment encountered in such ...

    • Nonparametric Estimation of Raindrop Size Distributions from Dual-Polarization Radar Spectral Observations 

      Moisseev, Dmitri N.; Chandrasekar, V. (American Meteorological Society, 2007)
      This paper presents a method to retrieve raindrop size distributions (DSD) from slant profile dual-polarization Doppler spectra observations. It is shown that using radar measurements taken at a high elevation angle raindrop ...

    • Three-Dimensional Mapping of Fluorescent Dye Using a Scanning, Depth-Resolving Airborne Lidar 

      Sundermeyer, M. A.; Terray, E. A.; Ledwell, J. R.; Cunningham, A. G.; LaRocque, P. E.; Banic, J.; Lillycrop, W. J. (American Meteorological Society, 2007)
      Results are presented from a pilot study using a fluorescent dye tracer imaged by airborne lidar in the ocean surface layer on spatial scales of meters to kilometers and temporal scales of minutes to hours. The lidar used ...

    • Finding Multiple Basin Modes in a Linear Ocean Model 

      Vikhliaev, Yury; Schopf, Paul; DelSole, Tim; Kirtman, Ben (American Meteorological Society, 2007)
      A method for finding the most unstable eigenmodes in linear models using the breeding technique was developed. The breeding technique was extended to allow for the calculation of complex eigenvalues and eigenvectors of the ...

    • A Comparative Assessment of Surface Wind Speed and Sea Surface Temperature over the Indian Ocean by TMI, MSMR, and ERA-40 

      Parekh, Anant; Sharma, Rashmi; Sarkar, Abhijit (American Meteorological Society, 2007)
      A 2-yr (June 1999?June 2001) observation of ocean surface wind speed (SWS) and sea surface temperature (SST) derived from microwave radiometer measurements made by a multifrequency scanning microwave radiometer (MSMR) and ...

    • The Use of New Parameterizations for Gaseous Absorption in the CLIRAD-SW Solar Radiation Code for Models 

      Tarasova, T. A.; Fomin, B. A. (American Meteorological Society, 2007)
      The new gaseous absorption parameterizations are incorporated in the CLIRAD-SW solar radiation code for models, openly distributed for the scientific community. In the new parameterizations, the magnitude of absorption ...

    • A Profiling Float’s Sense of Ice 

      Klatt, Olaf; Boebel, Olaf; Fahrbach, Eberhard (American Meteorological Society, 2007)
      The Argo project intends to continuously monitor temperature and salinity of the upper 2000 m of the global ocean by use of autonomous, vertically profiling floats. They are currently generating the largest oceanographic ...

    • A General Approach to the Retrieval of Raindrop Size Distributions from Wind Profiler Doppler Spectra: Modeling Results 

      Rajopadhyaya, Deepak K.; May, Peter T.; Vincent, Robert A. (American Meteorological Society, 1993)
      A technique is described that allows estimates of the raindrop size distribution to be obtained from the Doppler spectra measured by wind-profiling radars. The method makes no a priori assumptions regarding the shape of ...

    • On the Use of Hot-Wire Anemometers for Turbulence Measurements in Clouds 

      Siebert, Holger; Lehmann, Katrin; Shaw, Raymond A. (American Meteorological Society, 2007)
      The use of a hot-wire anemometer for high-resolution turbulence measurements in a two-phase flow (e.g., atmospheric clouds) is discussed. Experiments in a small wind tunnel (diameter of 0.2 and 2 m in length) with a mean ...

    • Trend Identification in Twentieth-Century U.S. Snowfall: The Challenges 

      Kunkel, Kenneth E.; Palecki, Michael A.; Hubbard, Kenneth G.; Robinson, David A.; Redmond, Kelly T.; Easterling, David R. (American Meteorological Society, 2007)
      There is an increasing interest in examining long-term trends in measures of snow climatology. An examination of the U.S. daily snowfall records for 1900?2004 revealed numerous apparent inconsistencies. For example, long-term ...

    • Radiation Dry Bias of the Vaisala RS92 Humidity Sensor 

      Vömel, H.; Selkirk, H.; Miloshevich, L.; Valverde-Canossa, J.; Valdés, J.; Kyrö, E.; Kivi, R.; Stolz, W.; Peng, G.; Diaz, J. A. (American Meteorological Society, 2007)
      The comparison of simultaneous humidity measurements by the Vaisala RS92 radiosonde and by the Cryogenic Frostpoint Hygrometer (CFH) launched at Alajuela, Costa Rica, during July 2005 reveals a large solar radiation dry ...

    • Sea Ice and Current Response to the Wind: A Vector Regressional Analysis Approach 

      Rabinovich, Alexander B.; Shevchenko, Georgy V.; Thomson, Richard E. (American Meteorological Society, 2007)
      The authors describe a two-dimensional (vector) regressional model for examining the anisotropic response of ice drift and ocean current velocity (?drift velocity?) to surface wind forcing. Illustration of the method is ...

    • Sensor Corrections for Sea-Bird SBE-41CP and SBE-41 CTDs 

      Johnson, Gregory C.; Toole, John M.; Larson, Nordeen G. (American Meteorological Society, 2007)
      Sensor response corrections for two models of Sea-Bird Electronics, Inc., conductivity?temperature?depth (CTD) instruments (the SBE-41CP and SBE-41) designed for low-energy profiling applications were estimated and applied ...