Topic
Microphysics
About: Microphysics is a research topic. Over the lifetime, 2357 publications have been published within this topic receiving 90618 citations.
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24 Oct 2013
TL;DR: In this paper, a Doppler radar (W-band or Ka-band) with scanning possibilities onboard a low-orbiting satellite is proposed to study the water cycle in the tropics.
Abstract: Numerous space radar missions are presently envisioned to study the water cycle in the tropics. Among them, the
DYCECT (DYnamique, energie et Cycle de l'Eau dans la Convection Tropicale) mission, a French proposal
(submitted to the French CNES Agency), could embark a Doppler radar (W-band or Ka-band) with scanning
possibilities onboard a low-orbiting satellite. This instrument could be implemented in addition to a Passive
Microwave Radiometer (PMR), and eventually an improved ScaraB-like broadband radiometer, and a lightning
detection instrument. This package will document the ice microphysics and the heat budgets. Since the
microphysics and the water and energy budgets are strongly driven by the dynamics, the addition of a Doppler radar
with scanning possibilities could provide valuable information (3D wind and rain fields) and a large statistic of such
critical information over the entire tropics and for all the stages of development. These new information could be
used to better understand the tropical convection and to improve convection parameterization relevant for cloud and
climate models. It could be used also to associate direct applications such as now-casting and risk prevention. The
present study focuses on the feasibility of such 3D wind field retrieval from spaceborne radar. It uses a simulator of
some parts of the spaceborne radar in order i) to evaluate the sensitivity of the retrieved wind fields to the scanning
strategies and sampling parameters, and to the instrumental and platform parameters and ii) to determine the best
parameters providing the most accurate wind fields.
01 Jan 2012
TL;DR: In this paper, various model parametrizations were tested in order to forecast the fog and low stratus using the same initial conditions, which resulted in a wrong 2m temperature and cloudiness forecast.
Abstract: In December 2004, fog and low stratus were absent from the initial conditions (although there was humidity) and failed to develop during the model forecast resulting in wrong 2m temperature and cloudiness forecast. Various model parametrizations were tested in order to forecast the fog and low stratus using the same initial conditions.