Browsing by Author "O'Dowd, Colin"

Now showing items 1-20 of 29

    • Aerosol Hygroscopic Growth in Marine and Continental Air 

      Bialek, Jakub (2013-09-24)
      Aerosol particulate matter contributes significantly to the global climate directly, through scattering and absorption of solar radiation, and indirectly, through changing cloud reflectance and cloud cover persistence. ...

    • Air to sea gas exchange of CO2 in the north-east Atlantic Ocean 

      Keane-Brennan, Jevon (2011-12-08)
      Atmospheric carbon dioxide concentrations have been rising for the past 200 years, and started increasing at a faster rate during the last 60 years. The world's oceans act as a reservoir for large amounts of CO_2. How they ...

    • Chemical nature and sources of particulate matter in urban areas 

      Lin, Chunshui (NUI Galway, 2019-05-07)
      Particulate matter (PM) air pollution adversely affects human health and can lead to premature deaths. The sources of air pollution, however, remain poorly understood especially in urban areas with intense human activities. ...

    • Contribution of isoprene oxidation products to marine aerosol over the north-east atlantic 

      Anttila, Tatu; Langmann, Baerbel; Varghese, Saji; O'Dowd, Colin (Hindawi Limited, 2010-01-01)
      Secondary organic aerosol (SOA) formation through isoprene oxidation was investigated with the regional-scale climate model REMOTE. The applied modeling scheme includes a treatment for marine primary organic aerosol ...

    • Detecting high contributions of primary organic matter to marine aerosol: a case study 

      Ovadnevaite, Jurgita; O'Dowd, Colin; Dall'Osto, Manuel; Ceburnis, Darius; Worsnop, Douglas R.; Berresheim, Harald (Wiley-Blackwell, 2011-01-01)
      Using on-line High-Resolution Aerosol Mass Spectrometry, we report submicron organic marine aerosol plume concentrations peaking at 3.8 mu g m(-3). These concentrations are far greater than previously determined by off-line ...

    • Eddy correlation measurements of ozone fluxes over coastal waters west of ireland 

      McVeigh, Philip; O'Dowd, Colin; Berresheim, Harald (Hindawi Limited, 2010-01-01)
      Measurements of ozone fluxes using the eddy-correlation (EC) technique were carried out for the first time at the Mace Head atmospheric research station, on the west coast of Ireland between August-October 2009. Vertical ...

    • Hygroscopicity of marine aerosol: Closure, long term observation and cloud condensation potential 

      Xu, Wei (NUI Galway, 2021-09-18)
      Marine aerosols have a profound impact on the global climate system by scattering solar radiation and serving as seeds for cloud formation. However, the marine aerosols in current models are still poorly represented and ...

    • Modelling of accidental radioactive releases for Ireland 

      Joy, Cillian (NUI Galway, 2020-07-14)
      This study analyses the findings of dispersion modelling comparisons to improve the understanding of uncertainty and to influence the development of Ireland’s operational Nuclear Power Plant (NPP) accident emergency ...

    • New Particle Formation in Marine Air 

      Monahan, Ciarán (2012-11-28)
      Marine aerosols contribute significantly to global climate directly by absorbing or scattering solar radiation, as well as indirectly by altering the reflectance and persistence of clouds. This work presents results of ...

    • Nitrogenated and aliphatic organic vapors as possible drivers for marine secondary organic aerosol growth 

      Dall'Osto, Manuel; Ceburnis, Darius; Monahan, Ciaran; Worsnop, Douglas R.; Bialek, Jakub; Kulmala, Markku; Kurtén, Theo; Ehn, Mikael; Wenger, John; Sodeau, John; Healy, Robert; O'Dowd, Colin (Wiley-Blackwell, 2012-06-27)
      Measurements of marine aerosol chemistry, using state-of-the-art mass spectrometry, as well as aerosol microphysics, hygroscopicity and cloud condensation nuclei (CCN) activity were undertaken during new particle growth ...

    • On the effect of wind speed on submicron sea salt mass concentrations and source fluxes 

      Ovadnevaite, Jurgita; Ceburnis, Darius; Canagaratna, Manjula; Berresheim, Harald; Bialek, Jakub; Martucci, Giovanni; Worsnop, Douglas R.; O'Dowd, Colin (Wiley-Blackwell, 2012-08-16)
      A High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was evaluated for its ability to quantify submicron sea salt mass concentrations. The evaluation included both laboratory and field studies. Quantification ...

    • On the occurrence of open ocean particle production and growth events 

      O'Dowd, Colin; Monahan, Ciaran; Dall'Osto, Manuel (Wiley-Blackwell, 2010-10-01)
      We present new results from the Mace Head coastal station illustrating that open ocean new particle production and growth events occur frequently during periods of high oceanic productivity over the N. E. Atlantic. For the ...

    • Primary marine aerosol fluxes 

      Brooks, Ian M.; Andreas, Edgar L; McFiggans, Gordon; Anguelova, Magdalena D.; O'Dowd, Colin (American Meteorological Society, 2011-04-01)

    • Primary marine organic aerosol: a dichotomy of low hygroscopicity and high ccn activity 

      Ovadnevaite, Jurgita; Ceburnis, Darius; Martucci, Giovanni; Bialek, Jakub; Monahan, Ciaran; Rinaldi, Matteo; Facchini, Maria Cristina; Berresheim, Harald; Worsnop, Douglas R.; O'Dowd, Colin (Wiley-Blackwell, 2011-11-01)
      High-time resolution measurements of primary marine organic sea-spray physico-chemical properties reveal an apparent dichotomous behavior in terms of water uptake: specifically sea-spray aerosol enriched in organic matter ...

    • Production flux of sea spray aerosol 

      de Leeuw, Gerrit; Andreas, Edgar L; Anguelova, Magdalena D.; Fairall, C. W.; Lewis, Ernie R.; O'Dowd, Colin; Schulz, Michael; Schwartz, Stephen E. (Wiley-Blackwell, 2011-05-07)
      Knowledge of the size- and composition-dependent production flux of primary sea spray aerosol (SSA) particles and its dependence on environmental variables is required for modeling cloud microphysical properties and aerosol ...

    • Production mechanisms, number concentration, size distribution, chemical composition, and optical properties of sea spray aerosols 

      Meskhidze, Nicholas; Petters, Markus D.; Tsigaridis, Kostas; Bates, Tim; O'Dowd, Colin; Reid, Jeff; Lewis, Ernie R.; Gantt, Brett; Anguelova, Magdalena D.; Bhave, Prakash V.; Bird, James; Callaghan, Adrian H.; Ceburnis, Darius; Chang, Rachel; Clarke, Antony; de Leeuw, Gerrit; Deane, Grant; DeMott, Paul J.; Elliot, Scott; Facchini, Maria Cristina; Fairall, Chris W.; Hawkins, Lelia; Hu, Yongxiang; Hudson, James G.; Johnson, Matthew S.; Kaku, Kathleen C.; Keene, William C.; Kieber, David J.; Long, Michael S.; Mårtensson, Monica; Modini, Rob L.; Osburn, Chris L.; Prather, Kimberly A.; Pszenny, Alex; Rinaldi, Matteo; Russell, Lynn M.; Salter, Matthew; Sayer, Andrew M.; Smirnov, Alexander; Suda, Sarah R.; Toth, Travis D.; Worsnop, Douglas R.; Wozniak, Andrew; Zorn, Sören R. (Wiley-Blackwell, 2013-06-21)

    • Regional Scale Modelling of Boundary Layer Ozone and Influences of Climate Change 

      Coleman, Mary (2013-02-20)
      Ozone is a major air quality parameter, a key player in atmospheric chemistry and instrumental in greenhouse gas forcing. Consequently, the subject of ozone pollution warrants significant consideration in the construction ...

    • Remote sensing and in-situ characterisation of atmospheric aerosol pollution 

      Grigas, Tomas (2017-05-08)
      This work focuses on characterising various aspects of clean-background and polluted aerosol, mainly focusing on the North East Atlantic and Europe, using a range of in-situ and remote sensing instrumentation. Prior to ...

    • Seasonal variation of the aerosol light scattering coefficient in marine air of the northeast atlantic 

      Vaishya, Aditya; Jennings, S. G.; O'Dowd, Colin (Hindawi Limited, 2011-01-01)
      Aerosol light scattering measurements were carried out using a TSI 3563 Nephelometer at the Mace Head Atmospheric Research Station, on the west coast of Ireland from year 2001-2010. A strong seasonal trend in the aerosol ...

    • Simulating marine new particle formation and growth using the m7 modal aerosol dynamics modal 

      Monahan, Ciaran; Vuollekoski, Henri; Kulmala, Markku; O'Dowd, Colin (Hindawi Limited, 2010-01-01)
      A modal atmospheric aerosol model (M7) is evaluated in terms of predicting marine new particle formation and growth. Simulations were carried out for three different nucleation schemes involving (1) kinetic self-nucleation ...