Comparing parameterized versus measured microphysical properties of tropical convective cloud bases during the ACRIDICON-CHUVA campaign

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Ramon Campos Braga
  • Daniel Rosenfeld
  • Ralf Weigel
  • Tina Jurkat
  • Meinrat O Andreae
  • Manfred Wendisch
  • Mira L Poehlker
  • Thomas Klimach
  • Ulrich Poeschl
  • Christopher Poehlker
  • Christiane Voigt
  • Christoph Mahnke
  • Stephan Borrmann
  • Rachel I Albrecht
  • Sergej Molleker
  • Daniel A Vila
  • Luiz AT Machado
  • Paulo Artaxo
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000403917900004&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.5194/acp-17-7365-2017
eISSN
1680-7324
Externe Identifier
  • Clarivate Analytics Document Solution ID: EY4AI
ISSN
1680-7316
Ausgabe der Veröffentlichung
12
Zeitschrift
ATMOSPHERIC CHEMISTRY AND PHYSICS
Paginierung
7365 - 7386
Datum der Veröffentlichung
2017
Status
Published
Titel
Comparing parameterized versus measured microphysical properties of tropical convective cloud bases during the ACRIDICON-CHUVA campaign
Sub types
  • Article
Ausgabe der Zeitschrift
17

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:p>Abstract. The objective of this study is to validate parameterizations that were recently developed for satellite retrievals of cloud condensation nuclei supersaturation spectra, NCCN(S), at cloud base alongside more traditional parameterizations connecting NCCN(S) with cloud base updrafts and drop concentrations. This was based on the HALO aircraft measurements during the ACRIDICON–CHUVA campaign over the Amazon region, which took place in September 2014. The properties of convective clouds were measured with a cloud combination probe (CCP), a cloud and aerosol spectrometer (CAS-DPOL), and a CCN counter onboard the HALO aircraft. An intercomparison of the cloud drop size distributions (DSDs) and the cloud water content (CWC) derived from the different instruments generally shows good agreement within the instrumental uncertainties. To this end, the directly measured cloud drop concentrations (Nd) near cloud base were compared with inferred values based on the measured cloud base updraft velocity (Wb) and NCCN(S) spectra. The measurements of Nd at cloud base were also compared with drop concentrations (Na) derived on the basis of an adiabatic assumption and obtained from the vertical evolution of cloud drop effective radius (re) above cloud base. The measurements of NCCN(S) and Wb reproduced the observed Nd within the measurements uncertainties when the old (1959) Twomey's parameterization was used. The agreement between the measured and calculated Nd was only within a factor of 2 with attempts to use cloud base S, as obtained from the measured Wb, Nd, and NCCN(S). This underscores the yet unresolved challenge of aircraft measurements of S in clouds. Importantly, the vertical evolution of re with height reproduced the observation-based nearly adiabatic cloud base drop concentrations, Na. The combination of these results provides aircraft observational support for the various components of the satellite-retrieved methodology that was recently developed to retrieve NCCN(S) under the base of convective clouds. This parameterization can now be applied with the proper qualifications to cloud simulations and satellite retrievals. </jats:p>
Autoren
  • Ramon Campos Braga
  • Daniel Rosenfeld
  • Ralf Weigel
  • Tina Jurkat
  • Meinrat O Andreae
  • Manfred Wendisch
  • Mira L Pöhlker
  • Thomas Klimach
  • Ulrich Pöschl
  • Christopher Pöhlker
  • Christiane Voigt
  • Christoph Mahnke
  • Stephan Borrmann
  • Rachel I Albrecht
  • Sergej Molleker
  • Daniel A Vila
  • Luiz AT Machado
  • Paulo Artaxo
DOI
10.5194/acp-17-7365-2017
eISSN
1680-7324
Ausgabe der Veröffentlichung
12
Zeitschrift
Atmospheric Chemistry and Physics
Sprache
en
Online publication date
2017
Paginierung
7365 - 7386
Status
Published online
Herausgeber
Copernicus GmbH
Herausgeber URL
http://dx.doi.org/10.5194/acp-17-7365-2017
Datum der Datenerfassung
2021
Titel
Comparing parameterized versus measured microphysical properties of tropical convective cloud bases during the ACRIDICON–CHUVA campaign
Ausgabe der Zeitschrift
17

Datenquelle: Crossref

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