Statistical database from existing data sets to assess the performances of a dynamics and microphysics studies-oriented mission: DYCECT - Archive ouverte HAL Access content directly
Conference Papers Year : 2019

Statistical database from existing data sets to assess the performances of a dynamics and microphysics studies-oriented mission: DYCECT

Nicolas Viltard
Audrey Martini
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  • PersonId : 946557
Julien Delanoë
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Abstract

A breakthrough for energy and water budgets would be to retrieve the horizontal and vertical transport terms. We propose here to study the feasibility of a mission that would carry a scanning polarimetric Doppler radar: DYCECT (DYnamique et Cycle de l'Eau dans la Convection Tropicale). The purpose of the mission would not only to be able to measure rain but also to retrieve instantaneous wind fields and statistics of dynamical properties in convection and to retrieve the microphysical properties of precipitating ice. In this study we used the existing data sets (TRMM-PR, CloudSat, GPM-DPR) to build a statistical database allowing us to characterize the cloud types and properties as seen by the future instrument. We can thus define more precisely the effective added value of the latter. We evaluated the occurrence and statistical properties of the rain systems that will be observed, depending on the radar characteristics. The poor temporal sampling of DYCECT (1 to 2 overpasses per day) will force us to work on averaged dynamical properties. It is thus necessary to check how long it takes to converge towards such values because this might impact the minimum required duration of the mission. Datasets already available (TRMM, GPM-Core, Cloudsat) will allow us to characterize the occurrence of the systems according to size, height of the detected clouds, average ice/water content, etc., which will impact the detection capabilities of the future instrument.
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hal-02389907 , version 1 (09-07-2020)

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Nicolas Viltard, Audrey Martini, Julien Delanoë. Statistical database from existing data sets to assess the performances of a dynamics and microphysics studies-oriented mission: DYCECT. AGU Fall Meeting 2019, Dec 2019, San Francisco, United States. pp.abstract #H21E-06. ⟨hal-02389907⟩
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