Introduction: European Integrated Project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) - integrating aerosol research from nano to global scales

ATMOSPHERIC CHEMISTRY AND PHYSICS (Impact Factor: 5.3). 01/2008; 9(8). DOI: 10.5194/acpd-8-19415-2008
Source: OAI

ABSTRACT The European Aerosol Cloud Climate and Air Quality Interactions project EUCAARI is an EU Research Framework 6 integrated project focusing on understanding the interactions of climate and air pollution. EUCAARI works in an integrative and multidisciplinary way from nano- to global scale. EUCAARI brings together several leading European research groups, state-of-the-art infrastructure and some key scientists from third countries to investigate the role of aerosol on climate and air quality. Altogether 48 partners from 25 countries are participating in EUCAARI. During the first 16 months EUCAARI has built operational systems e.g. established pan-European measurement network for Lagrangian studies and four stations in developing countries. Also an improved understanding of nanoscale processes (like nucleation) has been implemented in global models. Here we present the research methods, organisation, operations and first results of EUCAARI.

  • Source
    • "b Relative humidity in the marine aerosol layer ≥50%. Aerosol Cloud Climate and Air Quality Interactions (EUCAARI) (Kulmala et al., 2009 "
    [Show abstract] [Hide abstract]
    ABSTRACT: Owing to the high variability of aerosols, and their different impact on the Earth's climate system, aerosol type classification from satellite measurements is of high importance. Polarization sensitive lidar measurements on board the future Earth Clouds, Aerosols and Radiation Explorer (EarthCARE) satellite mission will provide information to distinguish different aerosol types. We analyze whether former classification schemes based on lidar measurements at 532 nm are applicable to EarthCARE measurements at 355 nm. We compare coordinated lidar measurements at both wavelengths performed during five field experiments; adapt thresholds for aerosol classification with future spaceborne lidar measurements and identify limitations of the current state of knowledge.
    Atmospheric Science Letters 08/2014; 16(1). DOI:10.1002/asl2.524 · 1.88 Impact Factor
  • Source
    • "tween 6 and 24 May 2008 as part of the European Integrated Project on Aerosol Cloud Climate Air Quality Interactions (EUCAARI; Kulmala et al., 2009, 2011 "
    [Show abstract] [Hide abstract]
    ABSTRACT: Black carbon-containing aerosol particles play an important role in the direct and indirect radiative forcing of climate. However, the magnitude and sign of the net radiative effect is strongly dependent on the physical properties of the black carbon (BC) component of the particles, such as mass concentration, number size distribution and mixing state. Here we use a global aerosol model combined with aircraft measurements of BC particle number and size from the Single Particle Soot Photometer (SP2) to assess the realism with which these physical properties are predicted by global models. The comparison reveals a substantial mismatch between the measured and modelled BC size distribution over the size range of the SP2 instrument (90-400 nm BC diameter). The model predicts BC particle number concentrations a factor ~3.5-5.7 higher than measured and a mode diameter that is ~40-65 nm smaller than observed. More than ~90% of the model particles with dry diameters ≳260 nm contain BC, while the observations suggest only 14% on average. These model-observation biases in the BC properties are considerably greater than for the overall particle distribution, suggesting that the discrepancy is associated with model assumptions about the size and mixing state of the emitted carbonaceous particles. We expect the discrepancy in BC size distribution to be common among most global aerosol models, with implications for model estimates of absorption optical depth and direct radiative forcing.
    ATMOSPHERIC CHEMISTRY AND PHYSICS 05/2013; 13(9):4917-4939. DOI:10.5194/acp-13-4917-2013 · 5.30 Impact Factor
  • Source
    • "For this an Aerodyne Aerosol Mass Spectrometer (AMS) was deployed during three intensive measurement campaigns in Melpitz together with a variety of other offline instrumentation . The measurements were integrated in the intensive measurement periods of the EU-Project EUCAARI (European Integrated Project on Aerosol Cloud Climate Air Quality Interactions, Kulmala et al., 2009), the programme EMEP (Co-operative programme for monitoring and evaluation of the long-range transmissions of air pollutants in Europe) and the UBA (Umweltbundesamt, the German federal environment agency) providing for the first time, at Melpitz, high time resolved aerosol chemical composition. These measurements covered different seasons: summer ( "
    [Show abstract] [Hide abstract]
    ABSTRACT: Ammonium nitrate and several organic compounds such as dicarboxylic acids (e. g. succinic acid, glutaric acid), some Polycyclic Aromatic Hydrocarbon (PAHs) or some n-alkanes are semi-volatile. The transition of these compounds between the gas and particulate phase may significantly change the aerosol particles radiative properties, the heterogeneous chemical properties, and, naturally, the total particulate mass concentration. To better assess these time-dependent effects, three intensive field experiments were conducted in 2008-2009 at the Central European EMEP research station Melpitz (Germany) using an Aerodyne Aerosol Mass Spectrometer (AMS). Data from all seasons highlight organic matter as being the most important particulate fraction of PM1 in summer (59 %) while in winter, the nitrate fraction was more prevalent (34.4 %). The diurnal variation of nitrate always showed the lowest concentration during the day while its concentration increased during the night. This night increase of nitrate concentration was higher in winter (Delta NO3- = 3.6 mu g m(-3)) than in summer (Delta NO3- = 0.7 mu g m(-3)). The variation in particulate nitrate was inherently linked to the gas-to-particle-phase equilibrium of ammonium nitrate and the dynamics of the atmosphere during day. The results of this study suggest that during summer nights, the condensation of HNO3 and NH3 on pre-existing particles represents the most prevalent source of nitrate, whereas during winter, nighttime chemistry is the predominant source of nitrate. During the summer 2008' s campaign, a clear diurnal evolution in the oxidation state of the organic matter became evident (Organic Mass to Organic Carbon ratio (OM/OC) ranging from 1.65 during night to 1.80 during day and carbon oxidation state (OSc) from -0.66 to -0.4), which could be correlated to hydroxyl radical (OH) and ozone concentrations, indicating a photochemical trans-formation process. In summer, the organic particulate matter seemed to be heavily influenced by regional secondary formation and transformation processes, facilitated by photochemical production processes as well as a diurnal cycling of the substances between the gas and particulate phase. In winter, these processes were obviously less pronounced (OM/OC ranging from 1.60 to 1.67 and OSc from -0.8 to -0.7), so that organic matter apparently originated mainly from aged particles and long range transport.
    ATMOSPHERIC CHEMISTRY AND PHYSICS 01/2011; 11(24-24):12579-12599. DOI:10.5194/acp-11-12579-2011 · 5.30 Impact Factor
Show more