Title :

Frontiers in Satellite-Based Estimates of Cloud-Mediated Aerosol Forcing

Author(s) :

Rosenfeld, Daniel [Auteur]
The Hebrew University of Jerusalem [HUJ]
Kokhanovsky, Alexander [Auteur]
German Research Centre for Geosciences - Helmholtz-Centre Potsdam [GFZ]
Goren, Tom [Auteur]
Bar-Ilan University [Israël]
Gryspeerdt, Edward [Auteur]
Imperial College London
Hasekamp, Otto [Auteur]
SRON Netherlands Institute for Space Research [SRON]
Jia, Hailing Jia [Auteur]
Leipziger Institut für Meteorologie [LIM]
Lopatin, Anton [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Quaas, Johannes [Auteur]
Leipziger Institut für Meteorologie [LIM]
Pan, Zengxin [Auteur]
The Hebrew University of Jerusalem [HUJ]
Sourdeval, Odran [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Journal title :

Reviews of Geophysics

Abbreviated title :

Rev. Geophys.

Volume number :

61

Pages :

-

Publication date :

2023-11-08

ISSN :

8755-1209

English keyword(s) :

aerosol-cloud-interactions
radiative forcing
boundary layer clouds
satellite retrievals
cloud drop number concentrations

HAL domain(s) :

Planète et Univers [physics]/Océan, Atmosphère

English abstract : [en]

Atmospheric aerosols affect the Earth's climate in many ways, including acting as the seeds on which cloud droplets form. Since a large fraction of these particles is anthropogenic, the clouds' microphysical and radiative ...
Show more >Atmospheric aerosols affect the Earth's climate in many ways, including acting as the seeds on which cloud droplets form. Since a large fraction of these particles is anthropogenic, the clouds' microphysical and radiative characteristics are influenced by human activity on a global scale leading to important climatic effects. The respective change in the energy budget at the top of the atmosphere is defined as the effective radiative forcing due to aerosol-cloud interaction (ERFaci). It is estimated that the ERFaci offsets presently nearly 1/4 of the greenhouse-induced warming, but the uncertainty is within a factor of two. A common method to calculate the ERFaci is by the multiplication of the susceptibility of the cloud radiative effect to changes in aerosols by the anthropogenic change of the aerosol concentration. This has to be done by integrating it over all cloud regimes. Here we review the various methods of the ERFaci estimation. Global measurements require satellites' global coverage. The challenge of quantifying aerosol amounts in cloudy atmospheres are met with the rapid development of novel methodologies reviewed here. The aerosol characteristics can be retrieved from space based on their optical properties, including polarization. The concentrations of the aerosols that serve as cloud drop condensation nuclei can be also estimated from their impact on the satellite-retrieved cloud drop number concentrations. These observations are critical for reducing the uncertainty in the ERFaci calculated from global climate models (GCMs), but further development is required to allow GCMs to properly simulate and benefit these novel observables.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

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

Submission date :

2024-01-16T23:02:14Z
2024-02-14T08:15:48Z