View in EDS HTML Full Text PDF Full Text

Turbulence and Cloudiness in Cumulus Topped Marine Boundary Layers.

Saved in:
Bibliographic Details
Title: Turbulence and Cloudiness in Cumulus Topped Marine Boundary Layers.
Authors: Ghate, Virendra P.1 (AUTHOR) vghate@anl.gov, Turner, David D.2 (AUTHOR), Mechem, David B.3 (AUTHOR), Gero, Jonathan4 (AUTHOR), Larson, Vincent E.5,6 (AUTHOR), Kleiss, Jessica7 (AUTHOR)
Source: Journal of Applied Meteorology & Climatology. May2026, Vol. 65 Issue 5, p1-17. 17p.
Subjects: Cloudiness, Cumulus clouds, Atmospheric radiation measurement, Turbulence, Atmospheric boundary layer, Doppler lidar, Radar
Abstract: Turbulence and cloudiness in cumulus-topped marine boundary layers are studied using data from the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic (ENA) site. The analysis includes eight periods of non-precipitating shallow cumulus clouds, spanning 141 hours and encompassing 603 individual clouds. On average, the cumuli had bases at 558 m, were 99 m thick, had a chord length of 500 m, and exhibited an hourly base-layer cloudiness of 12%. Changes in cloud fraction were primarily driven by variations in cloud number, not chord length. High-resolution Doppler lidar and cloud radar observations were used to estimate updraft and downdraft mass fluxes in the cumulus base layer under both clear and cloudy regions. Cloudy updrafts contributed only ~23% of the total updraft mass flux at cloud base, indicating that most upward mass flux originated from clear-air eddies. Updraft strength, rather than updraft fraction, was found to predominantly control both clear and cloudy updraft mass fluxes. Cloud base cloudiness strongly correlated with cloudy updraft mass flux but showed negligible correlation with clear-air updraft mass flux. Clear-air downdraft mass flux exhibited a strong relationship with the ratio of surface buoyancy to inversion strength. Mesoscale analysis revealed that moist patches had greater cloudiness, updraft mass flux, and vertical velocity variance compared to dry patches. Additionally, mesoscale base layer cloud fraction was highly and significantly correlated with cloudy updraft mass flux in both dry and moist environments. Results presented herein have implications for cumulus parameterization development along with climatological and model evaluation studies conducted at the ENA site. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Applied Meteorology & Climatology is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 194578035
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Turbulence and Cloudiness in Cumulus Topped Marine Boundary Layers.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Ghate%2C+Virendra+P%2E%22">Ghate, Virendra P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> vghate@anl.gov</i><br /><searchLink fieldCode="AR" term="%22Turner%2C+David+D%2E%22">Turner, David D.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mechem%2C+David+B%2E%22">Mechem, David B.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gero%2C+Jonathan%22">Gero, Jonathan</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Larson%2C+Vincent+E%2E%22">Larson, Vincent E.</searchLink><relatesTo>5,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kleiss%2C+Jessica%22">Kleiss, Jessica</searchLink><relatesTo>7</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Applied+Meteorology+%26+Climatology%22">Journal of Applied Meteorology & Climatology</searchLink>. May2026, Vol. 65 Issue 5, p1-17. 17p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Cloudiness%22">Cloudiness</searchLink><br /><searchLink fieldCode="DE" term="%22Cumulus+clouds%22">Cumulus clouds</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+radiation+measurement%22">Atmospheric radiation measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+boundary+layer%22">Atmospheric boundary layer</searchLink><br /><searchLink fieldCode="DE" term="%22Doppler+lidar%22">Doppler lidar</searchLink><br /><searchLink fieldCode="DE" term="%22Radar%22">Radar</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Turbulence and cloudiness in cumulus-topped marine boundary layers are studied using data from the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic (ENA) site. The analysis includes eight periods of non-precipitating shallow cumulus clouds, spanning 141 hours and encompassing 603 individual clouds. On average, the cumuli had bases at 558 m, were 99 m thick, had a chord length of 500 m, and exhibited an hourly base-layer cloudiness of 12%. Changes in cloud fraction were primarily driven by variations in cloud number, not chord length. High-resolution Doppler lidar and cloud radar observations were used to estimate updraft and downdraft mass fluxes in the cumulus base layer under both clear and cloudy regions. Cloudy updrafts contributed only ~23% of the total updraft mass flux at cloud base, indicating that most upward mass flux originated from clear-air eddies. Updraft strength, rather than updraft fraction, was found to predominantly control both clear and cloudy updraft mass fluxes. Cloud base cloudiness strongly correlated with cloudy updraft mass flux but showed negligible correlation with clear-air updraft mass flux. Clear-air downdraft mass flux exhibited a strong relationship with the ratio of surface buoyancy to inversion strength. Mesoscale analysis revealed that moist patches had greater cloudiness, updraft mass flux, and vertical velocity variance compared to dry patches. Additionally, mesoscale base layer cloud fraction was highly and significantly correlated with cloudy updraft mass flux in both dry and moist environments. Results presented herein have implications for cumulus parameterization development along with climatological and model evaluation studies conducted at the ENA site. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Applied Meteorology & Climatology is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=194578035
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1175/JAMC-D-25-0132.1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Cloudiness
        Type: general
      – SubjectFull: Cumulus clouds
        Type: general
      – SubjectFull: Atmospheric radiation measurement
        Type: general
      – SubjectFull: Turbulence
        Type: general
      – SubjectFull: Atmospheric boundary layer
        Type: general
      – SubjectFull: Doppler lidar
        Type: general
      – SubjectFull: Radar
        Type: general
    Titles:
      – TitleFull: Turbulence and Cloudiness in Cumulus Topped Marine Boundary Layers.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Ghate, Virendra P.
      – PersonEntity:
          Name:
            NameFull: Turner, David D.
      – PersonEntity:
          Name:
            NameFull: Mechem, David B.
      – PersonEntity:
          Name:
            NameFull: Gero, Jonathan
      – PersonEntity:
          Name:
            NameFull: Larson, Vincent E.
      – PersonEntity:
          Name:
            NameFull: Kleiss, Jessica
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 15588424
          Numbering:
            – Type: volume
              Value: 65
            – Type: issue
              Value: 5
          Titles:
            – TitleFull: Journal of Applied Meteorology & Climatology
              Type: main
ResultId 1