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    A New Method for Determining Cloud Transmittance and Optical Depth Using the ARM Micropulsed Lidar

    Source: Journal of Atmospheric and Oceanic Technology:;2002:;volume( 019 ):;issue: 007::page 1073
    Author:
    Mitrescu, Cristian
    ,
    Stephens, Graeme L.
    DOI: 10.1175/1520-0426(2002)019<1073:ANMFDC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Cirrus clouds play an important role in the climate through their optical and microphysical properties. The problem with measuring the optical properties of these clouds can be partially addressed by using lidar systems. The calibration of backscatter lidar systems, in particular, typically relies on the known molecular (Rayleigh) backscatter, which is a function of temperature, pressure, and chemical composition of the air. This paper presents an improved method for determining the cloud transmittance, and thus optical depth, derived from backscatter lidar measurements. A system of equations is developed in terms of a proposed metric that is required to possess a minima, and has a unique solution for the gain, offset, and transmittance. The new method is tested on a synthetic case as well as using data from two different lidar systems that operate at two different wavelengths. The method is applied to lidar data collected by the lidar operating at the central Pacific island of Nauru under the auspices of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Program.
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      A New Method for Determining Cloud Transmittance and Optical Depth Using the ARM Micropulsed Lidar

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4156368
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    contributor authorMitrescu, Cristian
    contributor authorStephens, Graeme L.
    date accessioned2017-06-09T14:29:15Z
    date available2017-06-09T14:29:15Z
    date copyright2002/07/01
    date issued2002
    identifier issn0739-0572
    identifier otherams-2017.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4156368
    description abstractCirrus clouds play an important role in the climate through their optical and microphysical properties. The problem with measuring the optical properties of these clouds can be partially addressed by using lidar systems. The calibration of backscatter lidar systems, in particular, typically relies on the known molecular (Rayleigh) backscatter, which is a function of temperature, pressure, and chemical composition of the air. This paper presents an improved method for determining the cloud transmittance, and thus optical depth, derived from backscatter lidar measurements. A system of equations is developed in terms of a proposed metric that is required to possess a minima, and has a unique solution for the gain, offset, and transmittance. The new method is tested on a synthetic case as well as using data from two different lidar systems that operate at two different wavelengths. The method is applied to lidar data collected by the lidar operating at the central Pacific island of Nauru under the auspices of the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Program.
    publisherAmerican Meteorological Society
    titleA New Method for Determining Cloud Transmittance and Optical Depth Using the ARM Micropulsed Lidar
    typeJournal Paper
    journal volume19
    journal issue7
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(2002)019<1073:ANMFDC>2.0.CO;2
    journal fristpage1073
    journal lastpage1081
    treeJournal of Atmospheric and Oceanic Technology:;2002:;volume( 019 ):;issue: 007
    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