A5009654503- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- COVID-19 impact on air quality
- Solar Radiation and Photovoltaics
- Aeolian processes and effects
Université de Lille
2024-2025
Laboratoire d'Optique Atmosphérique
2024-2025
Understanding the formation mechanisms of ice clouds is challenging due to their complex composition and diverse growth processes. Observational constraints have historically been limited, resulting in significant gaps our understanding representation clouds. Satellite measurements are particularly limited by absence critical environmental context information needed identify cloud evolution. These observations provide only a snapshot states microphysical properties at single moment. This...
In addition to their formation mechanisms, the origin of cirrus clouds (liquid-origin or in situ) can significantly influence microphysical and radiative properties. Liquid-origin cirrus, which form through freezing water droplets from mixed-phase region upon reaching temperatures (below -38°C), are typically characterized by high ice crystal concentrations associated with a strong cooling effect. contrast, situ-origin consist crystals that directly within regime via homogeneous...
Abstract. Cloud–radiation interaction still drives large uncertainties in climate models, and its estimation is key to make more accurate predictions. In this context, high-altitude cirrus clouds play a fundamental role because (1) they have high occurrence frequency globally (2) are the only cloud that can readily cool or warm atmosphere during daytime, depending on their properties. This study presents comprehensive analysis of optical scattering properties direct radiative effect based 4...
Understanding the formation mechanisms of ice clouds has been hindered by complexity their composition and diversity growth processes. Previously, observational constraints have limited, leading to substantial gaps in our comprehension representation clouds. Satellite measurements face a significant challenge due lack essential environmental context information, that is necessary identify understand cloud's mechanism evolution. Indeed, these representations only capture snapshot state cloud...
Complementarily to their formation mechanism, the origin of cirrus (liquid or in-situ) can substantially affect microphysical and radiative properties. Liquid-origin cirrus, which stem from freezing water droplets at temperatures, are typically characterised by high ice crystal concentrations associated with strong cooling effect. However, global occurence distribution this type as well environmental conditions in they originate. The role aerosols on liquid-origin through influence liquid...
Abstract. Cloud-radiation interaction still drives large uncertainties in climate models and its estimation is key to make more accurate predictions. In this context, the high-altitude cirrus clouds play a fundamental role, because 1) they have high occurrence frequency globally 2) are only cloud that can readily cool or warm atmosphere during daytime, depending on their properties. This study presents comprehensive analysis of radiative properties effects based 4 years continuous...
Ice clouds are challenging because of the high complexity and diversity their composition  (microphysics) as well formation growth processes. As a result, there has been little constraint from observations until recently, resulting in significant limitations our understanding representation ice clouds. A major problem with satellite measurements is lack information on environmental context, which necessary to identify understand mechanism evolution clouds; these renditions indeed...
<p>The understanding of aerosols and their impact on climate via interactions with clouds remains one the largest uncertainty to our current estimates future warming. A change in amount aerosol atmosphere, whether natural or artificial, can have a direct cloud particle nucleation. However, anthropogenically induced aerosol-cloud (aci) are thought counteract some effects global warming, quantifying effect total radiative forcing is vital for...