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Mapping the operation of the DMT continuous flow CCN counter

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ESS Instrument Construction Proposal CAMEA

Henrik Moodysson Rønnow, Paul Gregory Freeman

We propose the construction of a highly innovative spectrometer – CAMEA – offering Continuous Angular and Multiple Energy Analysis. Combining indirect time-of flight with multiple consecutive analyser arrays, this instrument will provide massive flux on th ...

2014

CCN data interpretation under dynamic operation conditions

Athanasios Nenes

We have developed a new numerical model for the non-steady-state operation of the Droplet Measurement Technologies (DMT) Cloud Condensation Nuclei (CCN) counter. The model simulates the Scanning Flow CCN Analysis (SFCA) instrument mode, where a wide supers ...

Taylor and Francis Inc.2014

Mineral dust and its microphysical interactions with clouds

Athanasios Nenes

Our understanding of the interactions of aerosols and clouds has a strong heritage in laboratory experiments, field measurements, and process modeling. We present a review on the state of knowledge for mineral dust emitted from major global dust source reg ...

Springer Netherlands2014

CAMEA: Technical Solutions

CAMEA is a new instrument concept so it is possible that the construction could or maintenance of the instrument would be hampered by technical details. In order to prevent this a technical predesign have been performed. This is not a final technical solut ...

2014

Analytical Calculations for CAMEA

CAMEA is a novel instrument concept, thus the performance has not been explored. Furthermore it is a complex instrument using many analyser arrays in a wide angular range. The performance of the instrument has been studied by use of three approaches: McSta ...

2014

Absolutely calibrated Raman lidar as a reference tool in atmospheric humidity profiling

Valentin Simeonov

Raman lidars exploit the proportionality between the intensity of scattered by a Raman process laser radiation and the number density of the scattering molecules to derive water vapor mixing ratio profile. Water vapor/air mixing ratio is directly proportio ...

2014

Toward the determination of joint volatility-hygroscopicity distributions: Development and response characterization for single-component aerosol

Athanasios Nenes

This work presents the development and characterization of a thermodenuder for the study and interpretation of aerosol volatility. Thermodenuder measurements are further combined with a continuous-flow streamwise thermal gradient CCN counter to obtain the ...

2014

A coupled observation - Modeling approach for studying activation kinetics from measurements of CCN activity

Athanasios Nenes

This paper presents an approach to study droplet activation kinetics from measurements of CCN activity by the Continuous Flow Streamwise Thermal Gradient CCN Chamber (CFSTGC) and a comprehensive model of the instrument and droplet growth. The model, which ...

2012

Vers une architecture économique. Une coopérative agricole sur l'île de Sikinos (Grèce)

Axel Ferret

«Les hommes n'acceptent le changement que dans la nécessité et ils ne voient la nécessité que dans la crise». [MONNET, JEAN, extrait de Mémoires, 1976]. La crise économique qui frappe actuellement l'Union Européenne pousse chaque jour un peu plus son peupl ...

2012

Water vapor depletion in the DMT continuous-flow CCN chamber: Effects on supersaturation and droplet growth

Athanasios Nenes

The continuous-flow streamwise thermal-gradient cloud condensation nuclei counter (CFSTGC) is a commercially available instrument that is widely used for laboratory and field measurements of cloud condensation nuclei (CCN). All studies to date assume that ...

2011