13 Result(s)
within
Laurent Deguillaume
-
Article
Culturable bacteria in clouds at Réunion, tropical island
The viable bacterial assemblages in clouds at Réunion Island (Indian Ocean) were examined through culture-based approach. A total of 176 isolates were recovered from 15 independent cloud events collected durin...
-
Article
Open AccessPublisher Correction: Effect of endogenous microbiota on the molecular composition of cloud water: a study by Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS)
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
-
Article
Open AccessEffect of endogenous microbiota on the molecular composition of cloud water: a study by Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS)
A cloud water sample collected at the puy de Dôme observatory (PUY) has been incubated under dark conditions, with its endogenous microbiota at two different temperatures (5 and 15 °C), and the change in the m...
-
Article
Open AccessMetatranscriptomic exploration of microbial functioning in clouds
Clouds constitute the uppermost layer of the biosphere. They host diverse communities whose functioning remains obscure, although biological activity potentially participates to atmospheric chemical and physic...
-
Chapter
Clouds: A Transient and Stressing Habitat for Microorganisms
In this chapter, we synthesized the current knowledge about clouds as ecosystems which have been discovered very recently. First, we briefly described the cloud habitat. Cloud physics chemistry and microphysic...
-
Article
Open AccessImproving the characterization of dissolved organic carbon in cloud water: Amino acids and their impact on the oxidant capacity
Improving our understanding of cloud chemistry depends on achieving better chemical characterization (90% of the organic carbon [OC] fraction remains uncharacterized) and, consequently, assessing the reactivit...
-
Chapter and Conference Paper
Regional Modeling of Aerosol Chemical Composition at the Puy de Dôme (France)
Organic aerosols (OA) represent a large fraction (from 20 to 90 %) of the submicron particulate mass and it is mainly composed of secondary organic aerosols (SOA). Despite the ubiquity of OA in the atmosphere,...
-
Chapter and Conference Paper
Modeling Seasonal Changes in Organic Aerosol Composition at the puy de Dôme (France)
In the atmosphere, a significant fraction of organic aerosol (OA) makes up the particulate matter. Since OA consists of thousands of complex molecules, uncertainties remain concerning their sources and atmosph...
-
Chapter and Conference Paper
Impact of Aerosol Properties on Cloud and Precipitation Formation
Clouds droplets are directly dependent on aerosols that are present in the atmosphere and on their probabilities to act as cloud condensation nuclei (CCN). So, it is necessary to study aerosols distributions n...
-
Chapter and Conference Paper
Evaluation of Cloud Chemistry Mechanism Towards Laboratory Experiments
Cloud chemistry models include more and more explicit multiphase mechanisms based on laboratory experiments that provide kinetic constants, stability constants of complexes, hydration constant, etc. However, they...
-
Chapter and Conference Paper
Extension to Chemical Products of the CERES Platform Used to Evaluate the Atmospheric Dispersion and Human Health Consequences of Noxious Releases
The CERES platform developed by CEA to assess the atmospheric dispersion and the environmental impact has been coupled with the Model of Multiphase Cloud Chemistry (M2C2) developed by LaMP in order to take acc...
-
Article
Towards an operational aqueous phase chemistry mechanism for regional chemistry-transport models: CAPRAM-RED and its application to the COSMO-MUSCAT model
Mechanism reductions of the detailed aqueous phase chemistry mechanism CAPRAM 3.0i are performed. Manual methods and automatic techniques are both applied in order to provide a less computationally intensive m...
-
Article
Numerical quantification of sources and phase partitioning of chemical species in cloud: application to wintertime anthropogenic air masses at the Puy de Dôme station
The Model of Multiphase Cloud Chemistry M2C2 has recently been extended to account for nucleation scavenging of aerosol particles in the cloud water chemical composition. This extended version has been applied...
