Space‐based analysis of the cloud thermodynamic ...
Document type :
Article dans une revue scientifique: Article original
DOI :
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Title :
Space‐based analysis of the cloud thermodynamic phase transition for varying microphysical and meteorological regimes
Author(s) :
Coopman, Q. [Auteur]
Riedi, Jerome [Auteur]
interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 [ICARE]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Zeng, S. [Auteur]
Garrett, T.J. [Auteur]
Riedi, Jerome [Auteur]
interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 [ICARE]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Zeng, S. [Auteur]
Garrett, T.J. [Auteur]
Journal title :
Geophysical Research Letters
Abbreviated title :
Geophys. Res. Lett.
Publisher :
American Geophysical Union (AGU)
Publication date :
2020-02-29
HAL domain(s) :
Physique [physics]/Physique [physics]/Physique Atmosphérique et Océanique [physics.ao-ph]
English abstract : [en]
Phase transitions leading to cloud glaciation occur at temperatures that vary between ‐ 38 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 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 μm, the glaciation temperature is 6°C higher than for cloud droplets smaller than 9 μm. Stronger updrafts are also associated with lower glaciation temperatures.Show less >
Show more >Phase transitions leading to cloud glaciation occur at temperatures that vary between ‐ 38 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 μm, the glaciation temperature is 6°C higher than for cloud droplets smaller than 9 μm. Stronger updrafts are also associated with lower glaciation temperatures.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Non spécifiée
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Research team(s) :
Interactions Rayonnement Nuages (IRN)
Submission date :
2020-03-03T22:57:05Z
2021-02-04T11:11:03Z
2022-08-26T11:26:55Z
2024-04-16T14:28:33Z
2021-02-04T11:11:03Z
2022-08-26T11:26:55Z
2024-04-16T14:28:33Z
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