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    Airborne and Ground-Based Measurements Using a High-Performance Raman Lidar

    Source: Journal of Atmospheric and Oceanic Technology:;2010:;volume( 027 ):;issue: 011::page 1781
    Author:
    Whiteman, David N.
    ,
    Rush, Kurt
    ,
    Rabenhorst, Scott
    ,
    Welch, Wayne
    ,
    Cadirola, Martin
    ,
    McIntire, Gerry
    ,
    Russo, Felicita
    ,
    Adam, Mariana
    ,
    Venable, Demetrius
    ,
    Connell, Rasheen
    ,
    Veselovskii, Igor
    ,
    Forno, Ricardo
    ,
    Mielke, Bernd
    ,
    Stein, Bernhard
    ,
    Leblanc, Thierry
    ,
    McDermid, Stuart
    ,
    Vömel, Holger
    DOI: 10.1175/2010JTECHA1391.1
    Publisher: American Meteorological Society
    Abstract: A high-performance Raman lidar operating in the UV portion of the spectrum has been used to acquire, for the first time using a single lidar, simultaneous airborne profiles of the water vapor mixing ratio, aerosol backscatter, aerosol extinction, aerosol depolarization and research mode measurements of cloud liquid water, cloud droplet radius, and number density. The Raman Airborne Spectroscopic Lidar (RASL) system was installed in a Beechcraft King Air B200 aircraft and was flown over the mid-Atlantic United States during July?August 2007 at altitudes ranging between 5 and 8 km. During these flights, despite suboptimal laser performance and subaperture use of the telescope, all RASL measurement expectations were met, except that of aerosol extinction. Following the Water Vapor Validation Experiment?Satellite/Sondes (WAVES_2007) field campaign in the summer of 2007, RASL was installed in a mobile trailer for ground-based use during the Measurements of Humidity and Validation Experiment (MOHAVE-II) field campaign held during October 2007 at the Jet Propulsion Laboratory?s Table Mountain Facility in southern California. This ground-based configuration of the lidar hardware is called Atmospheric Lidar for Validation, Interagency Collaboration and Education (ALVICE). During the MOHAVE-II field campaign, during which only nighttime measurements were made, ALVICE demonstrated significant sensitivity to lower-stratospheric water vapor. Numerical simulation and comparisons with a cryogenic frost-point hygrometer are used to demonstrate that a system with the performance characteristics of RASL?ALVICE should indeed be able to quantify water vapor well into the lower stratosphere with extended averaging from an elevated location like Table Mountain. The same design considerations that optimize Raman lidar for airborne use on a small research aircraft are, therefore, shown to yield significant dividends in the quantification of lower-stratospheric water vapor. The MOHAVE-II measurements, along with numerical simulation, were used to determine that the likely reason for the suboptimal airborne aerosol extinction performance during the WAVES_2007 campaign was a misaligned interference filter. With full laser power and a properly tuned interference filter, RASL is shown to be capable of measuring the main water vapor and aerosol parameters with temporal resolutions of between 2 and 45 s and spatial resolutions ranging from 30 to 330 m from a flight altitude of 8 km with precision of generally less than 10%, providing performance that is competitive with some airborne Differential Absorption Lidar (DIAL) water vapor and High Spectral Resolution Lidar (HSRL) aerosol instruments. The use of diode-pumped laser technology would improve the performance of an airborne Raman lidar and permit additional instrumentation to be carried on board a small research aircraft. The combined airborne and ground-based measurements presented here demonstrate a level of versatility in Raman lidar that may be impossible to duplicate with any other single lidar technique.
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      Airborne and Ground-Based Measurements Using a High-Performance Raman Lidar

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4212920
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorWhiteman, David N.
    contributor authorRush, Kurt
    contributor authorRabenhorst, Scott
    contributor authorWelch, Wayne
    contributor authorCadirola, Martin
    contributor authorMcIntire, Gerry
    contributor authorRusso, Felicita
    contributor authorAdam, Mariana
    contributor authorVenable, Demetrius
    contributor authorConnell, Rasheen
    contributor authorVeselovskii, Igor
    contributor authorForno, Ricardo
    contributor authorMielke, Bernd
    contributor authorStein, Bernhard
    contributor authorLeblanc, Thierry
    contributor authorMcDermid, Stuart
    contributor authorVömel, Holger
    date accessioned2017-06-09T16:37:13Z
    date available2017-06-09T16:37:13Z
    date copyright2010/11/01
    date issued2010
    identifier issn0739-0572
    identifier otherams-71069.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4212920
    description abstractA high-performance Raman lidar operating in the UV portion of the spectrum has been used to acquire, for the first time using a single lidar, simultaneous airborne profiles of the water vapor mixing ratio, aerosol backscatter, aerosol extinction, aerosol depolarization and research mode measurements of cloud liquid water, cloud droplet radius, and number density. The Raman Airborne Spectroscopic Lidar (RASL) system was installed in a Beechcraft King Air B200 aircraft and was flown over the mid-Atlantic United States during July?August 2007 at altitudes ranging between 5 and 8 km. During these flights, despite suboptimal laser performance and subaperture use of the telescope, all RASL measurement expectations were met, except that of aerosol extinction. Following the Water Vapor Validation Experiment?Satellite/Sondes (WAVES_2007) field campaign in the summer of 2007, RASL was installed in a mobile trailer for ground-based use during the Measurements of Humidity and Validation Experiment (MOHAVE-II) field campaign held during October 2007 at the Jet Propulsion Laboratory?s Table Mountain Facility in southern California. This ground-based configuration of the lidar hardware is called Atmospheric Lidar for Validation, Interagency Collaboration and Education (ALVICE). During the MOHAVE-II field campaign, during which only nighttime measurements were made, ALVICE demonstrated significant sensitivity to lower-stratospheric water vapor. Numerical simulation and comparisons with a cryogenic frost-point hygrometer are used to demonstrate that a system with the performance characteristics of RASL?ALVICE should indeed be able to quantify water vapor well into the lower stratosphere with extended averaging from an elevated location like Table Mountain. The same design considerations that optimize Raman lidar for airborne use on a small research aircraft are, therefore, shown to yield significant dividends in the quantification of lower-stratospheric water vapor. The MOHAVE-II measurements, along with numerical simulation, were used to determine that the likely reason for the suboptimal airborne aerosol extinction performance during the WAVES_2007 campaign was a misaligned interference filter. With full laser power and a properly tuned interference filter, RASL is shown to be capable of measuring the main water vapor and aerosol parameters with temporal resolutions of between 2 and 45 s and spatial resolutions ranging from 30 to 330 m from a flight altitude of 8 km with precision of generally less than 10%, providing performance that is competitive with some airborne Differential Absorption Lidar (DIAL) water vapor and High Spectral Resolution Lidar (HSRL) aerosol instruments. The use of diode-pumped laser technology would improve the performance of an airborne Raman lidar and permit additional instrumentation to be carried on board a small research aircraft. The combined airborne and ground-based measurements presented here demonstrate a level of versatility in Raman lidar that may be impossible to duplicate with any other single lidar technique.
    publisherAmerican Meteorological Society
    titleAirborne and Ground-Based Measurements Using a High-Performance Raman Lidar
    typeJournal Paper
    journal volume27
    journal issue11
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/2010JTECHA1391.1
    journal fristpage1781
    journal lastpage1801
    treeJournal of Atmospheric and Oceanic Technology:;2010:;volume( 027 ):;issue: 011
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian