scholarly journals Corrigendum to "Introduction: European Integrated Project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) – integrating aerosol research from nano to global scales" published in Atmos. Chem. Phys., 9, 2825–2841, 2009

2009 ◽  
Vol 9 (10) ◽  
pp. 3443-3444 ◽  
Author(s):  
M. Kulmala ◽  
A. Asmi ◽  
H. K. Lappalainen ◽  
K. S. Carslaw ◽  
U. Pöschl ◽  
...  
Keyword(s):  
Air Quality ◽  
Chem Phys ◽  
Aerosol Cloud ◽  
Integrated Project

scholarly journals Introduction: European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) – integrating aerosol research from nano to global scales

2008 ◽  
Vol 8 (6) ◽  
pp. 19415-19455 ◽  
Author(s):  
M. Kulmala ◽  
A. Asmi ◽  
H. K. Lappalainen ◽  
K. S. Carslaw ◽  
U. Pöschl ◽  
...  
Keyword(s):  
Air Quality ◽  
State Of The Art ◽  
Global Scale ◽  
Research Groups ◽  
Global Models ◽  
Aerosol Cloud ◽  
Operational Systems ◽  
First Results ◽  
Integrated Project

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.

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

2009 ◽  
Vol 9 (8) ◽  
pp. 2825-2841 ◽  
Author(s):  
M. Kulmala ◽  
A. Asmi ◽  
H. K. Lappalainen ◽  
K. S. Carslaw ◽  
U. Pöschl ◽  
...  
Keyword(s):  
Air Quality ◽  
State Of The Art ◽  
Global Scale ◽  
Research Groups ◽  
Global Models ◽  
Aerosol Cloud ◽  
Operational Systems ◽  
First Results ◽  
Integrated Project

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.

scholarly journals Impacts of aerosol-cloud interactions on past and future changes in tropospheric composition

2009 ◽  
Vol 9 (12) ◽  
pp. 4115-4129 ◽  
Author(s):  
N. Unger ◽  
S. Menon ◽  
D. M. Koch ◽  
D. T. Shindell
Keyword(s):  
Air Quality ◽  
Wet Deposition ◽  
Wide Spectrum ◽  
Surface Ozone ◽  
Tropospheric Chemistry ◽  
Atmospheric Composition ◽  
Sulfate Production ◽  
Aerosol Cloud ◽  
Aerosol Cloud Interactions ◽  
The Impact

Abstract. The development of effective emissions control policies that are beneficial to both climate and air quality requires a detailed understanding of all the feedbacks in the atmospheric composition and climate system. We perform sensitivity studies with a global atmospheric composition-climate model to assess the impact of aerosols on tropospheric chemistry through their modification on clouds, aerosol-cloud interactions (ACI). The model includes coupling between both tropospheric gas-phase and aerosol chemistry and aerosols and liquid-phase clouds. We investigate past impacts from preindustrial (PI) to present day (PD) and future impacts from PD to 2050 (for the moderate IPCC A1B scenario) that embrace a wide spectrum of precursor emission changes and consequential ACI. The aerosol indirect effect (AIE) is estimated to be −2.0 Wm−2 for PD-PI and −0.6 Wm−2 for 2050-PD, at the high end of current estimates. Inclusion of ACI substantially impacts changes in global mean methane lifetime across both time periods, enhancing the past and future increases by 10% and 30%, respectively. In regions where pollution emissions increase, inclusion of ACI leads to 20% enhancements in in-cloud sulfate production and ~10% enhancements in sulfate wet deposition that is displaced away from the immediate source regions. The enhanced in-cloud sulfate formation leads to larger increases in surface sulfate across polluted regions (~10–30%). Nitric acid wet deposition is dampened by 15–20% across the industrialized regions due to ACI allowing additional re-release of reactive nitrogen that contributes to 1–2 ppbv increases in surface ozone in outflow regions. Our model findings indicate that ACI must be considered in studies of methane trends and projections of future changes to particulate matter air quality.

scholarly journals Corrigendum to "Net radiative forcing and air quality responses to regional CO emission reductions" published in Atmos. Chem. Phys., 13, 5381–5399, 2013

2013 ◽  
Vol 13 (12) ◽  
pp. 5943-5944 ◽  
Author(s):  
M. M. Fry ◽  
M. D. Schwarzkopf ◽  
Z. Adelman ◽  
V. Naik ◽  
W. J. Collins ◽  
...  
Keyword(s):  
Air Quality ◽  
Radiative Forcing ◽  
Chem Phys ◽  
Emission Reductions ◽  
Co Emission

scholarly journals General overview: European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) – integrating aerosol research from nano to global scales

2011 ◽  
Vol 11 (6) ◽  
pp. 17941-18160 ◽  
Author(s):  
M. Kulmala ◽  
A. Asmi ◽  
H. K. Lappalainen ◽  
U. Baltensperger ◽  
J.-L. Brenguier ◽  
...  
Keyword(s):  
Air Quality ◽  
Radiative Forcing ◽  
Climate Models ◽  
Global Climate ◽  
Global Scale ◽  
Global Climate Models ◽  
Modeling Tools ◽  
Emissions Inventory ◽  
Airborne Measurements ◽  
Aerosol Cloud

Abstract. In this paper we describe and summarize the main achievements of the European Aerosol Cloud Climate and Air Quality Interactions project (EUCAARI). EUCAARI started on 1 January 2007 and ended on 31 December 2010 leaving a rich legacy including: (a) a comprehensive database with a year of observations of the physical, chemical and optical properties of aerosol particles over Europe, (b) the first comprehensive aerosol measurements in four developing countries, (c) a database of airborne measurements of aerosols and clouds over Europe during May 2008, (d) comprehensive modeling tools to study aerosol processes fron nano to global scale and their effects on climate and air quality. In addition a new Pan-European aerosol emissions inventory was developed and evaluated, a new cluster spectrometer was built and tested in the field and several new aerosol parameterizations and computations modules for chemical transport and global climate models were developed and evaluated. This work enabled EUCAARI to improve our understanding of aerosol radiative forcing and air quality-climate interactions. The EUCAARI results can be utilized in European and global environmental policy to assess the aerosol impacts and the corresponding abatement strategies.

scholarly journals An integrated modeling study on the effects of mineral dust and sea salt particles on clouds and precipitation

2010 ◽  
Vol 10 (10) ◽  
pp. 23959-24014 ◽  
Author(s):  
S. Solomos ◽  
G. Kallos ◽  
J. Kushta ◽  
M. Astitha ◽  
C. Tremback ◽  
...  
Keyword(s):  
Air Quality ◽  
Mineral Dust ◽  
Eastern Mediterranean ◽  
Atmospheric Modeling ◽  
Sea Salt ◽  
Cloud Formation ◽  
Dust Particles ◽  
Limited Area ◽  
Aerosol Cloud ◽  
Climate Interactions

Abstract. The amount of airborne particles that will nucleate and form cloud droplets under specific atmospheric conditions, depends on their number concentration, size distribution and chemical composition. Aerosol is affected by primary particle emissions, gas-phase precursors, their transformation and interaction with atmospheric constituents, clouds and dynamics. A comprehensive assessment of these interactions requires an integrated approach; most studies however decouple aerosol processes from cloud and atmospheric dynamics and cannot account for all the feedbacks involved in aerosol-cloud-climate interactions. This study addresses aerosol-cloud-climate interactions with the Integrated Community Limited Area Modeling System (ICLAMS) that includes online parameterization of the physical and chemical processes between air quality and meteorology. ICLAMS is an extended version of the Regional Atmospheric Modeling System (RAMS) and it has been designed for coupled air quality – meteorology studies. Model sensitivity tests for a single-cloud study as well as for a case study over the Eastern Mediterranean illustrate the importance of aerosol properties in cloud formation and precipitation. Mineral dust particles are often coated with soluble material such as sea-salt, thus exhibiting increased CCN efficiency. Increasing the percentage of salt-coated dust particles by 15% in the model resulted in more vigorous convection and more intense updrafts. The clouds that were formed extended about 3 km higher and the initiation of precipitation was delayed by one hour. Including on-line parameterization of the aerosol effects improved the model bias for the twenty-four hour accumulated precipitation by 7%. However, the spatial distribution and the amounts of precipitation varied greatly between the different aerosol scenarios. These results indicate the large portion of uncertainty that remains unresolved and the need for more accurate description of aerosol feedbacks in atmospheric models and climate change predictions.

Exploring NOx Emission from the Ground and the Air in London, UK

2020 ◽  
Author(s):  
Will Drysdale ◽  
Adam Vaughan ◽  
Freya Squires ◽  
Beth Nelson ◽  
Joseph Pitt ◽  
...  
Keyword(s):  
Air Quality ◽  
Environmental Science ◽  
Chem Phys ◽  
Air Pollutant ◽  
Eddy Covariance Method ◽  
Emissions Inventory ◽  
Pollution Levels ◽  
Air Quality Forecast ◽  
Surrounding Areas ◽  
The Uk

<p>NO<sub>x</sub> (the sum of NO + NO<sub>2</sub>) is emitted during most combustion processes. NO<sub>2</sub> is a well-known air pollutant detrimental to human health, critical in the formation of tropospheric ozone and its concentration is regulated in many cities. London is a megacity which often finds itself in breach of these air quality regulations. Emission inventories are used in air quality forecast models to predict current and future air pollution levels and to guide abatement strategy. The National Atmospheric Emissions Inventory (NAEI) has been shown to underestimate NO<sub>x</sub> emission in London (Lee et al. 2012, Vaughan et al. 2016). Top down measurements allow assessment of emissions help understand the difference between measurement and model.</p><p>During March – June 2017 NO<sub>x</sub> emissions were measured using the eddy covariance method sampling from a height of 180 m at the British Telecom (BT) tower in Central London. In July of 2017 measurements of NO<sub>x</sub> by the UK’s Facility for Airborne Atmospheric Measurement (FAAM) were made as a part of the Effect of Megacities on the Transport and Transformation of Pollutants on the Regional to Global Scales (EMeRGe). A mass balance approach (after O’Shea et al. 2014 and Pitt et al. 2019) has been applied to these measurements producing a measurement of bulk emission of NO<sub>x</sub> from Greater London and surrounding areas.</p><p>Through comparison of these measurements with the NAEI we present an exploration of NO<sub>x </sub>emission from London and assess how this is captured in the emissions inventory.</p><p> </p><p>Lee et al., <em>Environmental Science & Technology</em>, 2015, <strong>49</strong>, 1025-1034</p><p>Vaughan et al., <em>Faraday Discussions</em>, 2016, <strong>189</strong>, 455-472</p><p>O’Shea et al., <em>J. Geophys. Res. Atmos.</em>, 2014, <strong>119</strong>, 4940–4952</p><p>Pitt et al., <em>Atmos. Chem. Phys.</em>, 2019, <strong>19</strong>, 8931-8945</p>

Modelling aerosol–cloud–meteorology interaction: A case study with a fully coupled air quality model (GEM-MACH)

2015 ◽  
Vol 115 ◽  
pp. 695-715 ◽  
Author(s):  
W. Gong ◽  
P.A. Makar ◽  
J. Zhang ◽  
J. Milbrandt ◽  
S. Gravel ◽  
...  
Keyword(s):  
Air Quality ◽  
Air Quality Model ◽  
Quality Model ◽  
Aerosol Cloud ◽  
Fully Coupled

scholarly journals Corrigendum to "A novel downscaling technique for the linkage of global and regional air quality modeling" published in Atmos. Chem. Phys., 9, 9169–9185, 2009

2010 ◽  
Vol 10 (8) ◽  
pp. 4013-4031 ◽  
Author(s):  
Y. F. Lam ◽  
J. S. Fu
Keyword(s):  
Air Quality ◽  
Layer Structure ◽  
Atmospheric Model ◽  
Chem Phys ◽  
Regional Models ◽  
Global Atmospheric Model ◽  
Novel Approach ◽  
Vertical Variations ◽  
Regional Air Quality ◽  
Surface O3

Abstract. Recently, downscaling global atmospheric model outputs (GCTM) for the USEPA Community Multiscale Air Quality (CMAQ) Initial (IC) and Boundary Conditions (BC) have become practical because of the rapid growth of computational technologies that allow global simulations to be completed within a reasonable time. The traditional method of generating IC/BC by profile data has lost its advocates due to the weakness of the limited horizontal and vertical variations found on the gridded boundary layers. Theoretically, high quality GCTM IC/BC should yield a better result in CMAQ. Unfortunately, several researchers have found that the outputs from GCTM IC/BC are not necessarily better than profile IC/BC due to the excessive transport of O3 aloft in GCTM IC/BC. In this paper, we intend to investigate the effects of using profile IC/BC and global atmospheric model data. In addition, we are suggesting a novel approach to resolve the existing issue in downscaling. In the study, we utilized the GEOS-Chem model outputs to generate time-varied and layer-varied IC/BC for year 2002 with the implementation of tropopause determining algorithm in the downscaling process (i.e., based on chemical (O3) tropopause definition). The comparison between the implemented tropopause approach and the profile IC/BC approach is performed to demonstrate improvement of considering tropopause. It is observed that without using tropopause information in the downscaling process, unrealistic O3 concentrations are created at the upper layers of IC/BC. This phenomenon has caused over-prediction of surface O3 in CMAQ. In addition, the amount of over-prediction is greatly affected by temperature and latitudinal location of the study domain. With the implementation of the algorithm, we have successfully resolved the incompatibility issues in the vertical layer structure between global and regional chemistry models to yield better surface O3 predictions than profile IC/BC for both summer and winter conditions. At the same time, it improved the vertical O3 distribution of CMAQ outputs. It is strongly recommended that the tropopause information should be incorporated into any two-way coupled global and regional models, where the tropospheric regional model is used, to solve the vertical incompatibility that exists between global and regional models. We have discovered that the previously published paper was not the latest version of the manuscript we intended to use. Some corrections made during the second ACPD reviewing process were not incorporated in the text. As a result, the figure numbers (i.e., figure number below the graph) were not referenced correctly in the manuscript. Therefore, we have decided to re-publish this paper as a corrigendum.

scholarly journals Satellite-Surface Perspectives of Air Quality and Aerosol-Cloud Effects on the Environment: An Overview of 7-SEAS/BASELInE

2016 ◽  
Vol 16 (11) ◽  
pp. 2581-2602 ◽  
Author(s):  
Si-Chee Tsay ◽  
Hal B. Maring ◽  
Neng-Huei Lin ◽  
Sumaman Buntoung ◽  
Somporn Chantara ◽  
...  
Keyword(s):  
Air Quality ◽  
Aerosol Cloud
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