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Sources and seasonality of fluorescent aerosols in the Arctic

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Saharan dust event impacts on cloud formation and radiation over Western Europe

Athanasios Nenes, Horst Vogel

We investigated the impact of mineral dust particles on clouds, radiation and atmospheric state during a strong Saharan dust event over Europe in May 2008, applying a comprehensive online-coupled regional model framework that explicitly treats particle mic ...

2012

Cloud condensation nuclei as a modulator of ice processes in Arctic mixed-phase clouds

Athanasios Nenes

We propose that cloud condensation nuclei (CCN) concentrations are important for modulating ice formation of Arctic mixed-phase clouds, through modification of the droplet size distribution. Aircraft observations from the Aerosol, Radiation, and Cloud Proc ...

2011

Dynamical states of low temperature cirrus

Athanasios Nenes

Low ice crystal concentration and sustained in-cloud supersaturation, commonly found in cloud observations at low temperature, challenge our understanding of cirrus formation. Heterogeneous freezing from effloresced ammonium sulfate, glassy aerosol, dust a ...

2011

Photoactivatable Probes for Protein Labeling

Sambashiva Banala

Over the last decade, several protein tags have been developed for the specific and covalent labeling of fusion proteins with small organic probes. Among them, SNAP-tag has been used in many applications such as live cell imaging, protein microarrays and t ...

EPFL2010

Aerosol-cloud drop concentration closure in warm cumulus

Athanasios Nenes

Our understanding of the activation of aerosol particles into cloud drops during the formation of warm cumulus clouds presently has a limited observational foundation. Detailed observations of aerosol size and composition, cloud microphysics and dynamics, ...

2004

Kinetic limitations on cloud droplet formation and impact oncloud albedo

Athanasios Nenes

Under certain conditions mass transfer limitations on the growth of cloud condensation nuclei (CCN) may have a significant impact on the number of droplets that can form in a cloud. The assumption that particles remain in equilibrium until activated may th ...

Blackwell Munksgaard2001