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Remote sensing of cloud sides of deep convective clouds

Zinner, Tobias and Marshak, Alexander and Martins, Vanderlei and Lang, Steven (2007) Remote sensing of cloud sides of deep convective clouds. 24th IUGG General Assembly, 2007-07-02 - 2007-07-13, Perugia, (I). (Unpublished)

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Abstract

The formation of droplets starting from cloud condensation nuclei through the liquid phase mechanisms to the formation of ice crystals is reflected in the vertical profile of cloud properties. Insights into these microphysics are crucial to understand the onset of precipitation or any aerosol effect. In-situ measurements are limited in their temporal and spatial extent and applied mainly to shallow types of clouds. Satellite measurements from passive sensors are concentrating on cloud tops while vertical profiles of precipitation size drops are retrieved from radar measurements by CloudSat. These data still leave a gap, especially in our understanding of the development of deep convection where in-situ data is sparse and remote measurements difficult to interpret. The CLAIM-3D (cloud aerosol interaction mission in 3-D) passive cloud side viewing sensor concept is planned to become a new means of measuring the vertical profile of cloud microphysical properties. We present results that confirm the capabilities of this concept with respect to deep convection including liquid, ice and mixed phase cloud regions. 3D cloud microphysical information from the Goddard Cumulus Ensemble model is used as input into a 3D Monte Carlo radiative transfer model. Sensor observations in four notional channels in the visible, near-infrared, and infrared spectral region are simulated. It is demonstrated that this data set of simulated radiances and given cloud microphysics presents the basis for a Bayesian retrieval algorithm to derive a profile of cloud phase and effective particle size.

Document Type:Conference or Workshop Item (Speech)
Title:Remote sensing of cloud sides of deep convective clouds
Authors:
AuthorsInstitution or Email of Authors
Zinner, TobiasUNSPECIFIED
Marshak, AlexanderNASA, Greenbelt, MD, USA
Martins, VanderleiUniv. of Maryland, Baltimore County, MD, USA
Lang, StevenSSAI/NASA, Greenbelt, MD, USA
Date:July 2007
Status:Unpublished
Keywords:convection, effective radius, cloud phase, cloud side remote sensing, Bayesian retrieval
Event Title:24th IUGG General Assembly
Event Location:Perugia, (I)
Event Type:international Conference
Event Dates:2007-07-02 - 2007-07-13
Organizer:International Union of Geodesy and Geophysics
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Projekt Partikel und Zirren II (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Dr.rer.nat. Tobias Zinner
Deposited On:16 Jul 2007
Last Modified:27 Apr 2009 14:05

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