Titre :

Space‐Based Analysis of the Cloud Thermodynamic Phase Transition for Varying Microphysical and Meteorological Regimes

Auteur(s) :

Coopman, Quentin [Auteur]
1294|||Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA] (VALID)
Riedi, Jerome [Auteur]
1294|||Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA] (VALID)
Zeng, S. [Auteur]
Garrett, Timothy J. [Auteur]

Titre de la revue :

Geophysical Research Letters

Nom court de la revue :

Geophysical Research Letters

Numéro :

47

Éditeur :

American Geophysical Union (AGU)

Date de publication :

2020-03-13

Discipline(s) HAL :

Planète et Univers [physics]/Océan, Atmosphère

Résumé en anglais : [en]

Phase transitions leading to cloud glaciation occur at temperatures that vary between 38°C and 0°C depending on aerosol types and concentrations, the meteorology, and cloud microphysical and macrophysical parameters, ...
Lire la suite >Phase transitions leading to cloud glaciation occur at temperatures that vary between 38°C and 0°C depending on aerosol types and concentrations, the meteorology, and cloud microphysical and macrophysical parameters, although the relationships remain poorly understood. Here, we statistically retrieve a cloud glaciation temperature from two passive space‐based instruments that are part of the NASA/CNES A‐Train, the POLarization and Directionality of the Earth's Reflectances (POLDER) and the MODerate resolution Imaging Spectroradiometer (MODIS). We compare the glaciation temperature for varying bins of cloud droplet effective radius, latitude, and large‐scale vertical pressure velocity and specific humidity at 700 hPa. Cloud droplet size has the strongest influence on glaciation temperature: For cloud droplets larger than 21  m, the glaciation temperature is 6°C higher than for cloud droplets smaller than 9  m. Stronger updrafts are also associated with lower glaciation temperatures.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Équipe(s) de recherche :

Interactions Rayonnement Nuages (IRN)

Date de dépôt :

2024-01-09T17:26:25Z
2024-01-09T18:02:47Z
2024-02-23T11:48:22Z