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    Sampling Characteristics of an Aircraft-Borne Aerosol Inlet System

    Source: Journal of Atmospheric and Oceanic Technology:;2001:;volume( 018 ):;issue: 001::page 7
    Author:
    Hermann, M.
    ,
    Stratmann, F.
    ,
    Wilck, M.
    ,
    Wiedensohler, A.
    DOI: 10.1175/1520-0426(2001)018<0007:SCOAAB>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: When sampling aerosol particles from aircraft, the inlet system is the most critical item because it can strongly modify the number concentration, size distribution, and chemical composition of the particles. In this investigation, the authors describe a new aircraft-borne aerosol inlet and its sampling characteristics for submicrometer particle measurements in the upper troposphere and lower stratosphere. The new inlet is flown regularly on board a civil aircraft (Boeing 767 300ER) as part of the CARIBIC project. To investigate the sampling characteristics of the new inlet, a wind-tunnel study has been performed. Furthermore, particle transport losses in the sampling line have been calculated. Combining these results, an overall size-resolved inlet system sampling efficiency is given. During transport of the aerosol from the ambient environment to the measurement devices inside the aircraft, the aerosol experiences a strong heating within a few tenths of a second. To estimate the effects of this heating on the size distribution of the sampled particles, model calculations have been performed assuming the sampled particles to consist of sulfuric acid and water. The results show that a significant amount of water evaporates from the sampled particles, whereas sulfuric acid evaporation is so slow that it is negligible for particles larger than 4 nm.
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      Sampling Characteristics of an Aircraft-Borne Aerosol Inlet System

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4153900
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorHermann, M.
    contributor authorStratmann, F.
    contributor authorWilck, M.
    contributor authorWiedensohler, A.
    date accessioned2017-06-09T14:21:36Z
    date available2017-06-09T14:21:36Z
    date copyright2001/01/01
    date issued2001
    identifier issn0739-0572
    identifier otherams-1795.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4153900
    description abstractWhen sampling aerosol particles from aircraft, the inlet system is the most critical item because it can strongly modify the number concentration, size distribution, and chemical composition of the particles. In this investigation, the authors describe a new aircraft-borne aerosol inlet and its sampling characteristics for submicrometer particle measurements in the upper troposphere and lower stratosphere. The new inlet is flown regularly on board a civil aircraft (Boeing 767 300ER) as part of the CARIBIC project. To investigate the sampling characteristics of the new inlet, a wind-tunnel study has been performed. Furthermore, particle transport losses in the sampling line have been calculated. Combining these results, an overall size-resolved inlet system sampling efficiency is given. During transport of the aerosol from the ambient environment to the measurement devices inside the aircraft, the aerosol experiences a strong heating within a few tenths of a second. To estimate the effects of this heating on the size distribution of the sampled particles, model calculations have been performed assuming the sampled particles to consist of sulfuric acid and water. The results show that a significant amount of water evaporates from the sampled particles, whereas sulfuric acid evaporation is so slow that it is negligible for particles larger than 4 nm.
    publisherAmerican Meteorological Society
    titleSampling Characteristics of an Aircraft-Borne Aerosol Inlet System
    typeJournal Paper
    journal volume18
    journal issue1
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(2001)018<0007:SCOAAB>2.0.CO;2
    journal fristpage7
    journal lastpage19
    treeJournal of Atmospheric and Oceanic Technology:;2001:;volume( 018 ):;issue: 001
    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