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Lisa R. Bucci, Sharanya J. Majumdar, Robert Atlas, G. David Emmitt, and Steve Greco

groundwork for more advanced OSSEs, aimed at the understanding of how the assimilation of wind profiles from space-based Doppler Wind lidar would affect TC analyses and forecasts. Future planned experiments include a systematic evaluation of idealized vertical coverage of wind observations in and around a TC to determine the most impactful observations ( Torn 2014 ). Further refinements of existing experiments include the assimilation of Line-of-Sight observations in various spatial coverage patterns and

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Cornelius Hald, Matthias Zeeman, Patrick Laux, Matthias Mauder, and Harald Kunstmann

central Europe. Studying complex terrain is necessary to allow a wider range of opportunities for LES in real-world micrometeorological investigations. The simulated periods contain the transitions from nocturnal to daytime boundary layers and vice versa. The model results are evaluated against measurements of wind profiles using a triple Doppler-lidar setup. The first objective of this study is to analyze and evaluate model setups to achieve a stable model run in WRF-LES when using realistic boundary

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Coltin Grasmick, Bart Geerts, David D. Turner, Zhien Wang, and T. M. Weckwerth

lidars aboard the UWKA. These observations are used in an effort to understand the lifting mechanism and effective source level for CI in LC regions. Specifically, we use the airborne lidar data to determine the actual vertical displacement for parcels at all possible source levels and compare this against the vertical distance to the parcel’s LFC. The UWKA completed a total of 20 transects across three convergent boundary zones leading this MCS. The first zone, referred to as Region I ( Fig. 2 ), is

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Dana Mueller, Bart Geerts, Zhien Wang, Min Deng, and Coltin Grasmick

associated with a nocturnal MCS. This observational case study is unique in that it explores the evolution of the vertical structure of a bore. While other fixed, surface-based profiling observations depict a blend of distance and time evolution, this study uses airborne profiling lidar data, providing a series of quasi-instantaneous vertical transects, at a time resolution corresponding with the frequency of flight traverses across the bore (in this case 10–15 min). Another advantage to using an

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Ross N. Hoffman, Christopher Grassotti, Ronald G. Isaacs, Jean-Francois Louis, Thomas Nehrkorn, and Donald C. Norquist

DECEMBER 1990 HOFFMAN ET AL. 2513Assessment of the Impact of Simulated Satellite Lidar Wind and Retrieved 183 GHz Water Vapor Observations on a Global Data Assimilation SystemRoss N. HOFFMAN, CHRISTOPHER GRASSOTTI, RONALD G. ISAACS, JEAN-FRANCOIS LOUIS, AND THOMAS NEHRKORN Atmospheric and Environmental Research, Inc., Cambridge, Massachusetts DONALD C. NORQUISTGeophysics Laboratory, Air

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Philip T. Bergmaier and Bart Geerts

of airborne radar and lidar observations of a New York Finger Lakes LE snow event. The observations are unique in the sense that airborne measurements of any kind within LE cloud bands have generally been obtained from bands over the much larger Great Lakes, primarily Lake Michigan (e.g., Passarelli and Braham 1981 ; Kelly 1982 , 1984 ; Braham 1990 ; Chang and Braham 1991 ; Braham et al. 1992 ; Braham and Dungey 1995 ; Kristovich et al. 2003 ; Schroeder et al. 2006 ; Yang and Geerts 2006

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Stanley G. Benjamin, Eric P. James, Ming Hu, Curtis R. Alexander, Therese T. Ladwig, John M. Brown, Stephen S. Weygandt, David D. Turner, Patrick Minnis, William L. Smith Jr., and Andrew K. Heidinger

wide variety of decision-making including that for aviation and energy applications. Cloud observations are routinely derived from satellites and by surface-based ceilometers and visibility sensors—these provide possible input for operational weather forecast models. Previous nowcasting techniques using satellite cloud data without any prior background cloud information included were described by Albers et al. (1996) , Thompson et al. (1997) , Häggmark et al. (2000) , and Bayler et al. (2000

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Arnout Feijt and André van Lammeren

derivation of cloudproperties. Ground-based measurements from a lidar ceilometer and an infrared radiometer were combined withmeasurements of the NOAA Advanced Very High Resolution Radiometer and Meteosat satellite insmunents. Twocase studies ate presented: a case with streets of fair weather cumuli and a case with a weak cold front involvingcumulus, slratus, and cirrus clouds. From the combination of ground-based and satellite observations, a much betterdescription of the cloud field geomela'y, cloud

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Steven E. Koch, Paul B. Dorian, R. Ferrare, S. H. Melfi, William C. Skillman, and D. Whiteman

, Laurel Maryland *Universities Space Research Association, NASA/Goddard Space Flight Center, Greenbelt, Maryland # NASA /Goddard Space Flight Center, Laboratory Jbr Terrestrial Physics, Greenbelt, Maryland (Manuscript received 16 April 1990, in final form 31 August 1990) ABSTRACT Detailed moisture observations from a ground-based Raman lidar and special radiosonde data of two disturbances associated with a dissipating gust front are presented. A synthesis of the

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M. Weissmann, F. J. Braun, L. Gantner, G. J. Mayr, S. Rahm, and O. Reitebuch

. J. Geophys. Res. , 102 , 16663 – 16682 . Nyeki , S. , and Coauthors , 2002 : Airborne lidar and in-situ aerosol observations of an elevated layer, leeward of the European Alps and Apennines. Geophys. Res. Lett. , 29 . 1852, doi:10.1029/2002GL014897 . Rahm , S. , R. Simmet , and M. Wirth , 2003 : Airborne two micron coherent lidar wind profiles. Proc. 12th Coherent Laser Radar Conf., Bar Harbor, ME, 94–97 . Raymond , D. , and M. Wilkening , 1980 : Mountain

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