Title :

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

Author(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]

Journal title :

Geophysical Research Letters

Abbreviated title :

Geophysical Research Letters

Volume number :

47

Publisher :

American Geophysical Union (AGU)

Publication date :

2020-03-13

HAL domain(s) :

Planète et Univers [physics]/Océan, Atmosphère

English abstract : [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, ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

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

Research team(s) :

Interactions Rayonnement Nuages (IRN)

Submission date :

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