Skip to Main content Skip to Navigation
Journal articles

Evolution of DARDAR-CLOUD ice cloud cloud retrieval: new parameters and impacts on the retrieved microphysical properties

Abstract : In this paper we present the latest refinements brought to the DARDAR-CLOUD product, which contains ice cloud microphysical properties retrieved from the cloud radar and lidar measurements from the A-Train mission. Based on a large dataset of in-situ ice cloud measurements collected during several campaigns performed between 2000 and 2007 in different regions of the globe, the parameterizations used in the microphysical model of the algorithm were assessed and refined to 5 better fit the measurements, keeping the same formalism as proposed in DARDAR basis papers. It is shown that these changes can affect the ice water content retrievals by up to 50%, with, globally, a reduction of the ice water content and ice water path. In parallel, the retrieved effective radii increase between 5% and 40%. The largest differences are found for the warmest temperatures (between −20°C and 0°C) in regions where the cloud microphysical processes are more complex and where the retrieval is almost exclusively based on radar-only measurements. In regions where lidar measurements are available, the lidar 10 ratio retrieved for ice clouds is shown to be well constrained by lidar-radar combination or molecular signal detected below thin semi-transparent cirrus. Using this information, the parameterization of the lidar ratio was refined and the new retrieval equals on average 35sr ± 10sr in the temperature range between −60°C and −20°C.
Complete list of metadatas

https://hal-insu.archives-ouvertes.fr/insu-01946767
Contributor : Catherine Cardon <>
Submitted on : Thursday, December 6, 2018 - 1:13:20 PM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM

Identifiers

  • HAL Id : insu-01946767, version 1

Citation

Quitterie Cazenave, Marie Ceccaldi, Julien Delanoë, Jacques Pelon, Silke Groß, et al.. Evolution of DARDAR-CLOUD ice cloud cloud retrieval: new parameters and impacts on the retrieved microphysical properties. Atmospheric Measurement Techniques Discussions, 2018, pp.(Under Review). ⟨insu-01946767⟩

Share

Metrics

Record views

223