Concept

Assombrissement global

Publications associées (113)

Global distribution of cloud droplet number concentration, autoconversion rate, and aerosol indirect effect under diabatic droplet activation

This study presents a global assessment of the sensitivity of droplet number to diabatic activation (i.e., including effects from entrainment of dry air) and its first-order tendency on indirect forcing and autoconversion. Simulations were carried out with ...

Wiley-Blackwell2011

Identification of chemistry-dependent artifacts on gravimetric PM fine readings at the T1 site during the MILAGRO field campaign

Athanasios Nenes

As part of the MIRAGE (MILAGRO) study conducted 7-30 March 2006 in Mexico City and its Metropolitan Area (MCMA), fine particulate matter (PM2.5) was collected using two Tapered Element Oscillating Microbalance (TEOM) systems, and a Partisol instrument at t ...

2011

In-situ observations of young contrails – overview and selected results from the CONCERT campaign

Julia Schmale, Roger Baumann

Lineshaped contrails were detected with the research aircraft Falcon during the CONCERT – CONtrail and Cirrus ExpeRimenT – campaign in October/November 2008. The Falcon was equipped with a set of instruments to measure the particle size distribution, shape ...

2010

Aerosol layers from the 2008 eruptions of Mount Okmok and Mount Kasatochi: In situ upper troposphere and lower stratosphere measurements of sulfate and organics over Europe

Julia Schmale

In 2008 Mount Okmok and Mount Kasatochi started erupting on 12 July and 7 August, respectively, in the Aleutians, depositing emissions of trace gases and aerosols as high as 15.2 km into the atmosphere. During an aircraft campaign, conducted over Europe in ...

2010

Thermodynamic characterization of Mexico City aerosol during MILAGRO 2006

Athanasios Nenes

Fast measurements of aerosol and gas-phase constituents coupled with the ISORROPIA-II thermodynamic equilibrium model are used to study the partitioning of semivolatile inorganic species and phase state of Mexico City aerosol sampled at the T1 site during ...

Copernicus GmbH2009

Estimation of road traffic emission factors from a long term tracer study

Alain Clappier, Luis Carlos Belalcazar Ceron, Erika Maria Zarate Torres, Minh Dung Ho

Road traffic emissions, one of the largest source categories in megacity inventories, are highly uncertain. It is essential to develop methodologies to reduce these uncertainties to manage air quality more effectively. In this paper, we propose a methodolo ...

2009

Stakeholder-based Scenarios for Post-2012 Climate Policy: A Participatory Approach

Philippe Thalmann, Juan Carlos Altamirano Cabrera, Ronal Gainza Carmenates, José Luis Carrasco Terceros

We performed a study to define the key elements of feasible global climate policy scenarios for the post-2012 UNFCCC regime by contacting – through a series of questionnaires – 149 stakeholders involved in climate-change discussions. We applied a Multiple ...

2009

Brown Carbon Spheres in East Asian Outflow and Their Optical Properties

Duncan Thomas Lindsay Alexander

Atmospheric aerosols play a substantial role in climate change through radiative forcing. Combustion-produced carbonaceous particles are the main light-absorbing aerosols; thus, quantifying their optical properties is essential for determining the magnitud ...

2008

Vertical distribution of the different types of aerosols in the stratosphere: Detection of solid particles and analysis of their spatial variability

Quentin Bourgeois

Stratospheric aerosols play a significant role in stratospheric chemistry. In the past, it was assumed that only liquid droplets are present in the stratosphere. Nevertheless, a few lidar measurements have shown that sudden enhancement of aerosol content i ...

2008

CCN activity and droplet growth kinetics of fresh and aged monoterpene secondary organic aerosol

Athanasios Nenes, Spyros Pandis

The ability of secondary organic aerosol (SOA) produced from the ozonolysis of α-pinene and monoterpene mixtures (α-pinene, β-pinene, limonene and 3-carene) to become cloud droplets was investigated. A static CCN counter and a Scanning Mobility CCN Analyse ...

European Geosciences Union2008

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