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    Vertical 2-μm Heterodyne Differential Absorption Lidar Measurements of Mean CO2 Mixing Ratio in the Troposphere

    Source: Journal of Atmospheric and Oceanic Technology:;2008:;volume( 025 ):;issue: 009::page 1477
    Author:
    Gibert, Fabien
    ,
    Flamant, Pierre H.
    ,
    Cuesta, Juan
    ,
    Bruneau, Didier
    DOI: 10.1175/2008JTECHA1070.1
    Publisher: American Meteorological Society
    Abstract: Vertical mean CO2 mixing ratio measurements are reported in the atmospheric boundary layer (ABL) and in the lower free troposphere (FT), using a 2-?m heterodyne differential absorption lidar (HDIAL). The mean CO2 mixing ratio in the ABL is determined using 1) aerosol backscatter signal and a mean derivative of the increasing optical depth as a function of altitude and 2) optical depth measurements from cloud target returns. For a 1-km vertical long path in the ABL, 2% measurement precision with a time resolution of 30 min is demonstrated for the retrieved mean CO2 absorption. Spectroscopic calculations are reported in details using new spectroscopic data in the 2-?m domain and the outputs of the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5). Then, using both aerosols in the ABL and midaltitude dense clouds in the free troposphere, preliminary HDIAL measurements of mean CO2 mixing ratio in the free troposphere are also presented. The 2-?m HDIAL vertical measurements are compared to ground-based and airborne in situ CO2 mixing ratio measurements and discussed with the atmospheric synoptic conditions.
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      Vertical 2-μm Heterodyne Differential Absorption Lidar Measurements of Mean CO2 Mixing Ratio in the Troposphere

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4209103
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    contributor authorGibert, Fabien
    contributor authorFlamant, Pierre H.
    contributor authorCuesta, Juan
    contributor authorBruneau, Didier
    date accessioned2017-06-09T16:25:31Z
    date available2017-06-09T16:25:31Z
    date copyright2008/09/01
    date issued2008
    identifier issn0739-0572
    identifier otherams-67634.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4209103
    description abstractVertical mean CO2 mixing ratio measurements are reported in the atmospheric boundary layer (ABL) and in the lower free troposphere (FT), using a 2-?m heterodyne differential absorption lidar (HDIAL). The mean CO2 mixing ratio in the ABL is determined using 1) aerosol backscatter signal and a mean derivative of the increasing optical depth as a function of altitude and 2) optical depth measurements from cloud target returns. For a 1-km vertical long path in the ABL, 2% measurement precision with a time resolution of 30 min is demonstrated for the retrieved mean CO2 absorption. Spectroscopic calculations are reported in details using new spectroscopic data in the 2-?m domain and the outputs of the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5). Then, using both aerosols in the ABL and midaltitude dense clouds in the free troposphere, preliminary HDIAL measurements of mean CO2 mixing ratio in the free troposphere are also presented. The 2-?m HDIAL vertical measurements are compared to ground-based and airborne in situ CO2 mixing ratio measurements and discussed with the atmospheric synoptic conditions.
    publisherAmerican Meteorological Society
    titleVertical 2-μm Heterodyne Differential Absorption Lidar Measurements of Mean CO2 Mixing Ratio in the Troposphere
    typeJournal Paper
    journal volume25
    journal issue9
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/2008JTECHA1070.1
    journal fristpage1477
    journal lastpage1497
    treeJournal of Atmospheric and Oceanic Technology:;2008:;volume( 025 ):;issue: 009
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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