Journal of Atmospheric and Oceanic Technology: Recent submissions

Now showing items 3041-3060 of 5084

    • Penalized Maximal F Test for Detecting Undocumented Mean Shift without Trend Change 

      Wang, Xiaolan L. (American Meteorological Society, 2008)
      In this study, a penalized maximal F test (PMFT) is proposed for detecting undocumented mean shifts that are not accompanied by any sudden change in the linear trend of time series. PMFT aims to even out the uneven ...

    • High-Resolution Radio Acoustic Sounding System Observations and Analysis up to 20 km 

      Alexander, Simon P.; Tsuda, Toshitaka (American Meteorological Society, 2008)
      The first campaign-based measurements of virtual temperature in the upper-troposphere and lower-stratosphere (UTLS) region were made with the middle- and upper-atmosphere (MU) radar radio acoustic sounding system (RASS) ...

    • First-Year Operation of a New Water Vapor Raman Lidar at the JPL Table Mountain Facility, California 

      Leblanc, Thierry; McDermid, I. Stuart; Aspey, Robin A. (American Meteorological Society, 2008)
      A new water vapor Raman lidar was recently built at the Table Mountain Facility (TMF) of the Jet Propulsion Laboratory (JPL) in California and more than a year of routine 2-h-long nighttime measurements 4?5 times per week ...

    • A Four-Year Lidar–Sun Photometer Aerosol Study at São Paulo, Brazil 

      Landulfo, Eduardo; Papayannis, Alexandros; Torres, Ani Sobral; Uehara, Sandro Toshio; Pozzetti, Lucila Maria Viola; Alencar de Matos, Caio; Sawamura, Patricia; Morinobu Nakaema, Walter; de Jesus, Wellington (American Meteorological Society, 2008)
      A backscattering lidar system, the first of this kind in Brazil, has been used to provide the vertical profile of the aerosol backscatter coefficient at 532 nm up to an altitude of 4?6 km above sea level (ASL), in a suburban ...

    • Investigating Seasonal PR–TMI Calibration Differences 

      Dinku, Tufa; Anagnostou, Emmanouil N. (American Meteorological Society, 2008)
      Seasonal differences in the calibration of overland passive microwave rain retrieval are investigated using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR). Four geographic ...

    • Development of the HIRS Outgoing Longwave Radiation Climate Dataset 

      Lee, Hai-Tien; Gruber, Arnold; Ellingson, Robert G.; Laszlo, Istvan (American Meteorological Society, 2007)
      The Advanced Very High Resolution Radiometer (AVHRR) outgoing longwave radiation (OLR) product, which NOAA has been operationally generating since 1979, is a very long data record that has been used in many applications, ...

    • Evaluation of an LES-Based Wind Profiler Simulator for Observations of a Daytime Atmospheric Convective Boundary Layer 

      Scipión, Danny E.; Chilson, Phillip B.; Fedorovich, Evgeni; Palmer, Robert D. (American Meteorological Society, 2008)
      The daytime atmospheric convective boundary layer (CBL) is characterized by strong turbulence that is primarily caused by buoyancy forced from the heated underlying surface. The present study considers a combination of a ...

    • An In-Flight Calibration Method for Near-Real-Time Humidity Measurements with the Airborne MOZAIC Sensor 

      Smit, Herman G. J.; Volz-Thomas, Andreas; Helten, Manfred; Paetz, Werner; Kley, Dieter (American Meteorological Society, 2008)
      A new in-flight calibration (IFC) method is described for the humidity sensor flown routinely since 1994 on the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) program?s aircraft. The IFC method ...

    • Performance and Uncertainty of CNR1 Net Radiometers during a One-Year Field Comparison 

      Michel, Dominik; Philipona, Rolf; Ruckstuhl, Christian; Vogt, Roland; Vuilleumier, Laurent (American Meteorological Society, 2008)
      Net radiation flux in correlation with surface energy budget, snowmelt, glacier ice balance, and forest or agricultural flux exchange investigations is measured in numerous field experiments. Instrument costs and energy ...

    • Platform-Motion Correction of Velocity Measured by Doppler Lidar 

      Hill, Reginald J.; Brewer, W. Alan; Tucker, Sara C. (American Meteorological Society, 2008)
      The NOAA/Earth System Research Laboratory (ESRL) has two coherent Doppler lidar systems that have been deployed on board research vessels to obtain data during several experiments. The instruments measure the wind velocity ...

    • Four-Dimensional Variational Data Analysis of Water Vapor Raman Lidar Data and Their Impact on Mesoscale Forecasts 

      Grzeschik, Matthias; Bauer, Hans-Stefan; Wulfmeyer, Volker; Engelbart, Dirk; Wandinger, Ulla; Mattis, Ina; Althausen, Dietrich; Engelmann, Ronny; Tesche, Matthias; Riede, Andrea (American Meteorological Society, 2008)
      The impact of water vapor observations on mesoscale initial fields provided by a triangle of Raman lidar systems covering an area of about 200 km ? 200 km is investigated. A test case during the Lindenberg Campaign for ...

    • Microphysical Retrievals from Dual-Polarization Radar Measurements at X Band 

      Gorgucci, Eugenio; Chandrasekar, V.; Baldini, Luca (American Meteorological Society, 2008)
      The recent advances in attenuation correction methodology are based on the use of a constraint represented by the total amount of the attenuation encountered along the path shared over each range bin in the path. This ...

    • Coupled Contributions in the Doppler Radar Spectrum Width Equation 

      Fang, Ming; Doviak, Richard J. (American Meteorological Society, 2008)
      Contrary to accepted usage, the second central moment of the Doppler spectrum is not the sum of the second central moments of individual spectral broadening mechanisms. A rigorous theoretical derivation of the spectrum ...

    • Image Navigation for the FY2 Geosynchronous Meteorological Satellite 

      Lu, Feng; Zhang, Xiaohu; Xu, Jianmin (American Meteorological Society, 2008)
      An automatic image navigation algorithm for Feng Yun 2 (FY2) spin-stabilized geosynchronous meteorological satellites was determined at the National Satellite Meteorological Center (NSMC) of the China Meteorological ...

    • Measurements of Boundary Layer Profiles with In Situ Sensors and Doppler Lidar 

      Frehlich, Rod; Meillier, Yannick; Jensen, Michael L. (American Meteorological Society, 2008)
      A new in situ measurement system and lidar processing algorithms were developed for improved measurements of boundary layer profiles. The first comparisons of simultaneous Doppler lidar?derived profiles of the key turbulence ...

    • Effects of Wind Field Inhomogeneities on Doppler Beam Swinging Revealed by an Imaging Radar 

      Cheong, B. L.; Palmer, R. D.; Yu, T-Y.; Yang, K-F.; Hoffman, M. W.; Frasier, S. J.; Lopez-Dekker, F. J. (American Meteorological Society, 2008)
      In this work, the accuracy of the Doppler beam-swinging (DBS) technique for wind measurements is studied using an imaging radar?the turbulent eddy profiler (TEP) developed by the University of Massachusetts, with data ...

    • Lidar Observations of the Vertical Aerosol Flux in the Planetary Boundary Layer 

      Engelmann, Ronny; Wandinger, Ulla; Ansmann, Albert; Müller, Detlef; Žeromskis, Egidijus; Althausen, Dietrich; Wehner, Birgit (American Meteorological Society, 2008)
      The vertical aerosol transport in the planetary boundary layer (PBL) is investigated with lidars. Profiles of the vertical wind velocity are measured with a 2-?m Doppler wind lidar. Aerosol parameters are derived from ...

    • Performance of the Precipitation Occurrence Sensor System as a Precipitation Gauge 

      Sheppard, B. E.; Joe, P. I. (American Meteorological Society, 2008)
      The Precipitation Occurrence Sensor System (POSS) is a small X-band Doppler radar originally developed by the Meteorological Service of Canada for reporting the occurrence, type, and intensity of precipitation from Automated ...

    • Advances in Continuously Profiling the Thermodynamic State of the Boundary Layer: Integration of Measurements and Methods 

      Löhnert, Ulrich; Crewell, S.; Krasnov, O.; O’Connor, E.; Russchenberg, H. (American Meteorological Society, 2008)
      This paper describes advances in ground-based thermodynamic profiling of the lower troposphere through sensor synergy. The well-documented integrated profiling technique (IPT), which uses a microwave profiler, a cloud ...

    • In Situ Samplings and Remote Sensing Measurements to Characterize Aerosol Properties over Southeast Italy 

      Bellantone, V.; Carofalo, I.; De Tomasi, F.; Perrone, M. R.; Santese, M.; Tafuro, A. M.; Turnone, A. (American Meteorological Society, 2008)
      Ground-based particulate matter (PM) samplers, an XeF Raman lidar operating in the framework of the European Aerosol Research Lidar Network (EARLINET), and a sun/sky radiometer operating in the framework of the Aerosol ...