SAPHIR-NG High Resolution Microwave Sounder: Towards an Enhanced Observation of the Atmosphere

Puech, J.; Hermozo, L.; Brogniez, Hélène; Chambon, Philippe; Roca, Rémy; Cipolla, Valerio; Goldstein, C.; Picard, Bruno; Bennartz, Ralf; Carayon, B.; Orlhac, J.-C.; Malassingne, Christophe; Costes, L.; Jeannin, Nicolas; Moraine, A.

doi:10.1109/igarss47720.2021.9554426

Cited by 2 publications

(1 citation statement)

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“…The two passive microwave radiometers inherit from the SAPHIR moisture sounder on Megha-Tropiques (Brogniez et al, 2013;Roca et al, 2015), which underwent technical improvements to have a more compact (more receivers for the same volume) and less energy-consuming instrument (Puech et al, 2021), as well as from the ICI sounder onboard the upcoming MetOP-SG (Thomas et al, 2012). This so-called SAPHIR-New Generation (SAPHIR-NG) sounder will observe the 183.31 GHz and 325.15 GHz strong H 2 O absorption lines and will be completed by a window channel at 89 GHz (Puech et al, 2021).…”

Section: Observing the Dynamics Of Deep Convectionmentioning

confidence: 99%

Time-Delayed Tandem Microwave Observations of Tropical Deep Convection: Overview of the C2OMODO Mission

Brogniez

Roca

Auguste

et al. 2022

Front. Remote Sens.

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Convective clouds serve as a primary mechanism for the transfer of thermal energy, moisture, and momentum through the troposphere. Arguably, satellite observations are the only viable way to sample the convective updrafts over the oceans. Here, the potential of temporal derivatives of measurements performed in H2O lines (183GHz and 325 GHz) to infer the deep convective vertical air motions is assessed. High-resolution simulations of tropical convection are combined with radiative transfer models to explore the information content of time-derivative maps (as short as 30 s) of brightness temperatures (dTb/dt). The 183-GHz Tb signal from hydrometeors is used to detect the location of convective cores. The forward simulations suggest that within growing convective cores, the dTb/dt is related to the vertically integrated ice mass flux and that it is sensitive to the temporal evolution of microphysical properties along the life cycle of convection. In addition, the area-integrated dTb/dt, is related to the amount, size, and density of detrained ice, which are controlled by riming and aggregation process rates. These observations, particularly in conjunction with Doppler velocity measurements, can be used to refine these assumptions in ice microphysics parameterizations. Further analyses show that a spectral sampling of the 183 GHz absorbing line can be used to estimate the maximum in-cloud vertical velocity that is reached as well as its altitude with reasonable uncertainties.

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