Search Results

You are looking at 141 - 150 of 3,984 items for :

  • Lidar observations x
  • All content x
Clear All
Shannon Mason, Christian Jakob, Alain Protat, and Julien Delanoë

observations have presented a new opportunity to improve our understanding of Southern Ocean clouds; recent studies have used radar and lidar profiles to produce detailed climatologies and vertical profiles of Southern Ocean clouds in terms of cloud microphysics and macrophysics ( Mace 2010 ; Huang et al. 2012a , b ; Verlinden et al. 2011 ). A useful approach to identifying and distinguishing between cloud processes or properties is to group self-similar cloud scenes based on passive satellite

Full access
James A. Whiteway and Allan I. Carswell

3122 $OURNAL OF THE ATMOSPHERIC SCIENCES VoL. 51, No. 21Rayleigh Lidar Observations of Thermal Structure and Gravity Wave Activity in the High Arctic during a Stratospheric Warming JAMES A. WHITEWAY AND ALLAN I. CARSWELLInstitute for Space and Terrestrial Science and the Department of Physics and Astronomy, York University, North York, Ontario, Canada (Manuscript received 3 November 1993, in

Full access
Benjamin A. Toms, Jessica M. Tomaszewski, David D. Turner, and Steven E. Koch

the high spatiotemporal resolution of Oklahoma Mesonet surface observations in concert with vertical profiling observations from two Atmospheric Emitted Radiance Interferometers (AERI) and a Doppler wind lidar (DWL) to provide details on the four-dimensional evolution of a bore-soliton wave complex. Prior to discussing the wave complex, we provide details of the utilized instruments in section 2 . The prewave environment is discussed using both atmospheric profiles and synoptic weather analyses

Full access
Tobias Marke, Susanne Crewell, Vera Schemann, Jan H. Schween, and Minttu Tuononen

meteorological-tower measurements ( Dörenkämper et al. 2015 ). Even though these observations provide good vertical resolution, they are lacking in temporal resolution (radiosondes) and vertical extent (towers). Therefore, many previous studies have utilized remotely sensing radio acoustic or (ultra–high frequency) radar wind profilers to obtain detailed case analyses and continuous long-term records of LLJs (e.g., Baas et al. 2009 ; Lampert et al. 2016 ; Mitchell et al. 1995 ). Doppler wind lidars (DWLs

Full access
Alice K. DuVivier, John J. Cassano, Steven Greco, and G. David Emmitt

the DAWN lidar, dropsonde, and satellite observations of the barrier wind observed on 21 May 2015 from approximately 1900 to 2200 UTC. Our focus is to use these observations to evaluate how well high-resolution regional simulations with the Weather Research and Forecasting (WRF) Model can reproduce the observed features with different horizontal and vertical resolutions and with two different boundary layer parameterizations. As such, we will not focus on diagnosing the dynamics that create the

Full access
Andreas Schäfler, Ben Harvey, John Methven, James D. Doyle, Stephan Rahm, Oliver Reitebuch, Fabian Weiler, and Benjamin Witschas

their influence on high-impact weather downstream ( Schäfler et al. 2018 ). For the first time, an established Doppler wind lidar payload on board the research aircraft DLR Falcon performed dedicated observations of the jet stream winds providing both high vertical and horizontal resolution, which is not available from other observational sources. Additionally, the wind lidar dataset is supplemented by dropsonde and ground-based wind profiler observations to provide a wider coverage and to

Restricted access
A. Protat, J. Delanoë, E. J. O’Connor, and T. S. L’Ecuyer

has been obtained from the 3 yr of Darwin radar–lidar observations used in Protat et al. (2010) . REFERENCES Delanoë, J. , and Hogan R. J. , 2008 : A variational scheme for retrieving ice cloud properties from combined radar, lidar, and infrared radiometer . J. Geophys. Res. , 113 , D07204 , doi:10.1029/2007JD009000 . Protat, A. , Delanoë J. , O’Connor E. , and L’Ecuyer T. , 2010 : The evaluation of CloudSat and CALIPSO ice microphysical products using ground-based cloud radar

Full access
Peter W. Henderson and Robert Pincus

possibility is the ground-based measurements made at observatories operated by the Atmospheric Radiation Measurement (ARM) and Cloudnet programs. These sites combine retrievals from upward-pointing active remote sensing instruments (radars and lidars) to produce long-term, high-frequency records of the vertical structure of clouds (e.g., Clothiaux et al. 2000 ). The main difficulty with using these observations is that they are pointlike, whereas model predictions are defined at the larger spatial scales

Full access
Tetsu Sakai, David N. Whiteman, Felicita Russo, David D. Turner, Igor Veselovskii, S. Harvey Melfi, Tomohiro Nagai, and Yuzo Mano

: Fluorescence spectra and elastic scattering characteristics of atmospheric aerosol in Las Cruces, New Mexico, USA: Variability of concentrations and possible constituents and sources of particles in various spectral clusters . Atmos. Environ. , 65 , 195 – 204 . Pruppacher, H. R. , and Klett J. D. , 1997 : Microphysics of Clouds and Precipitation . 2nd ed. Kluwer Academic Publishers, 954 pp. Rizi, V. , Iarlori M. , Rocci G. , and Visconti G. , 2004 : Raman lidar observations of cloud liquid

Full access
William P. Hooper and Jeffrey E. James

2 s and provided excellent spatial and temporal resolution. However, the GPS positions of the Truxton were only recorded every 15 min, and these positions had to be supplemented by visual observations made from the Glorita of the relative azimuth of the Truxton and its approximate range. Since the estimated positions of the Truxton on pass 4 are inaccurate, the data from this pass are not used in this paper. Figure 4 shows a false color image of the lidar data taken on pass 5 where the

Full access