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    Multiyear Summertime Observations of Daytime Fair-Weather Cumuli at the ARM Southern Great Plains Facility

    Source: Journal of Climate:;2013:;volume( 026 ):;issue: 024::page 10031
    Author:
    Chandra, Arunchandra S.
    ,
    Kollias, Pavlos
    ,
    Albrecht, Bruce A.
    DOI: 10.1175/JCLI-D-12-00223.1
    Publisher: American Meteorological Society
    Abstract: long data record (14 yr) of ground-based observations at the Atmospheric Radiation Measurement Program (ARM) Southern Great Plains (SGP) site is analyzed to document the macroscopic and dynamical properties of daytime fair-weather cumulus clouds during summer months. First, a fuzzy logic?based algorithm is developed to eliminate insect radar echoes in the boundary layer that hinder the ability to develop representative cloud statistics. The refined dataset is used to document the daytime composites of fair-weather cumulus clouds properties. Doppler velocities are processed for lower reflectivity thresholds that contain small cloud droplets having insignificant terminal velocities; thus, Doppler velocities are used as tracers of air motion. The algorithm is implemented to process the entire 14-yr dataset of cloud radar vertical velocity data. Composite diurnal variations of the cloud vertical velocity statistics, surface parameters, and profiles of updraft and downdraft fractions, bulk velocity of updrafts and downdrafts, and updraft and downdraft mass flux are calculated. Statistics on the cloud geometrical properties such as cloud thickness, cloud chord length, cloud spacing, and aspect ratios are calculated on the cloud scale. The present dataset provides a unique insight into the daytime evolution and statistical description of the turbulent structure inside fair-weather cumuli over land.
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      Multiyear Summertime Observations of Daytime Fair-Weather Cumuli at the ARM Southern Great Plains Facility

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4222268
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    contributor authorChandra, Arunchandra S.
    contributor authorKollias, Pavlos
    contributor authorAlbrecht, Bruce A.
    date accessioned2017-06-09T17:06:24Z
    date available2017-06-09T17:06:24Z
    date copyright2013/12/01
    date issued2013
    identifier issn0894-8755
    identifier otherams-79483.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4222268
    description abstractlong data record (14 yr) of ground-based observations at the Atmospheric Radiation Measurement Program (ARM) Southern Great Plains (SGP) site is analyzed to document the macroscopic and dynamical properties of daytime fair-weather cumulus clouds during summer months. First, a fuzzy logic?based algorithm is developed to eliminate insect radar echoes in the boundary layer that hinder the ability to develop representative cloud statistics. The refined dataset is used to document the daytime composites of fair-weather cumulus clouds properties. Doppler velocities are processed for lower reflectivity thresholds that contain small cloud droplets having insignificant terminal velocities; thus, Doppler velocities are used as tracers of air motion. The algorithm is implemented to process the entire 14-yr dataset of cloud radar vertical velocity data. Composite diurnal variations of the cloud vertical velocity statistics, surface parameters, and profiles of updraft and downdraft fractions, bulk velocity of updrafts and downdrafts, and updraft and downdraft mass flux are calculated. Statistics on the cloud geometrical properties such as cloud thickness, cloud chord length, cloud spacing, and aspect ratios are calculated on the cloud scale. The present dataset provides a unique insight into the daytime evolution and statistical description of the turbulent structure inside fair-weather cumuli over land.
    publisherAmerican Meteorological Society
    titleMultiyear Summertime Observations of Daytime Fair-Weather Cumuli at the ARM Southern Great Plains Facility
    typeJournal Paper
    journal volume26
    journal issue24
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-12-00223.1
    journal fristpage10031
    journal lastpage10050
    treeJournal of Climate:;2013:;volume( 026 ):;issue: 024
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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    yabeshDSpacePersian