Browsing by Subject "boundary-layer"

Now showing items 1-20 of 23

    • A sea spray aerosol flux parameterization encapsulating wave state 

      Ovadnevaite, J.; Manders, A.; de Leeuw, G.; Ceburnis, D.; Monahan, C.; Partanen, A.-I.; Korhonen, H.; O'Dowd, C. D. (Copernicus GmbH, 2014-02-17)
      A new sea spray source function (SSSF), termed Oceanflux Sea Spray Aerosol or OSSA, was derived based on in-situ sea spray aerosol measurements along with meteorological/physical parameters. Submicron sea spray aerosol ...

    • Advances in characterization of size-resolved organic matter in marine aerosol over the north atlantic 

      Cavalli, F. (Wiley-Blackwell, 2004-01-01)
      Size-segregated marine aerosols were collected at Mace Head Atmospheric Research Station (Ireland) during spring and autumn 2002 corresponding with the phytoplankton bloom periods in the North Atlantic. Strict control of ...

    • Aerosol decadal trends – part 2: in-situ aerosol particle number concentrations at gaw and actris stations 

      Asmi, A.; Collaud Coen, M.; Ogren, J. A.; Andrews, E.; Sheridan, P.; Jefferson, A.; Weingartner, E.; Baltensperger, U.; Bukowiecki, N.; Lihavainen, H.; Kivekäs, N.; Asmi, E.; Aalto, P. P.; Kulmala, M.; Wiedensohler, A.; Birmili, W.; Hamed, A.; O'Dowd, C.; G Jennings, S.; Weller, R.; Flentje, H.; Fjaeraa, A. M.; Fiebig, M.; Myhre, C. L.; Hallar, A. G.; Swietlicki, E.; Kristensson, A.; Laj, P. (Copernicus GmbH, 2013-01-22)
      We have analysed the trends of total aerosol particle number concentrations (N) measured at long-term measurement stations involved either in the Global Atmosphere Watch (GAW) and/or EU infrastructure project ACTRIS. The ...

    • Aerosol optical depth in clean marine and continental northeast atlantic air 

      Mulcahy, J. P.; O'Dowd, C. D.; Jennings, S. G. (Wiley-Blackwell, 2009-10-30)
      The aerosol optical depth (AOD) and Angstrom exponent for the period 2002-2004 is evaluated for clean marine and continentally influenced air masses over the northeast Atlantic region. Measurements were carried out at the ...

    • Atmospheric particle formation events at värriö measurement station in finnish lapland 1998-2002 

      Vehkamäki, H.; Dal Maso, M.; Hussein, T.; Flanagan, R.; Hyvärinen, A.; Lauros, J.; Merikanto, P.; Mönkkönen, M.; Pihlatie, K.; Salminen, K.; Sogacheva, L.; Thum, T.; Ruuskanen, T. M.; Keronen, P.; Aalto, P. P.; Hari, P.; Lehtinen, K. E. J.; Rannik, Ü; Kulmala, M. (Copernicus GmbH, 2004-10-05)
      During the calendar years 1998 - 2002, 147 clear 8 nm diameter particle formation events have been identified at the SMEAR I station in Varrio, northern Finland. The events have been classified in detail according to the ...

    • Composition of 15–85 nm particles in marine air 

      Lawler, M. J.; Whitehead, J.; O'Dowd, C.; Monahan, C.; McFiggans, G.; Smith, J. N. (Copernicus GmbH, 2014-11-05)
      The chemical composition of 15-85 nm diameter particles was measured at Mace Head, Ireland, during May 2011 using the TDCIMS (thermal desorption chemical ionization mass spectrometer). Measurable levels of chloride, sodium, ...

    • Diurnal, synoptic and seasonal variability of atmospheric co<sub>2</sub> in the paris megacity area 

      Xueref-Remy, Irène; Dieudonné, Elsa; Vuillemin, Cyrille; Lopez, Morgan; Lac, Christine; Schmidt, Martina; Delmotte, Marc; Chevallier, Frédéric; Ravetta, François; Perrussel, Olivier; Ciais, Philippe; Bréon, François-Marie; Broquet, Grégoire; Ramonet, Michel; Spain, T. Gerard; Ampe, Christophe (Copernicus GmbH, 2018-03-07)
      Most of the global fossil fuel CO2 emissions arise from urbanized and industrialized areas. Bottom-up inventories quantify them but with large uncertainties. In 2010-2011, the first atmospheric in situ CO2 measurement ...

    • Do anthropogenic, continental or coastal aerosol sources impact on a marine aerosol signature at mace head? 

      O'Dowd, C.; Ceburnis, D.; Ovadnevaite, J.; Vaishya, A.; Rinaldi, M.; Facchini, M. C. (Copernicus GmbH, 2014-10-10)
      Atmospheric aerosols have been sampled and characterised at the Mace Head north-east (NE) Atlantic atmospheric research station since 1958, with many interesting phenomena being discovered. However, with the range of new ...

    • Evidence of a natural marine source of oxalic acid and a possible link to glyoxal 

      Rinaldi, Matteo; Decesari, Stefano; Carbone, Claudio; Finessi, Emanuela; Fuzzi, Sandro; Ceburnis, Darius; O'Dowd, Colin D.; Sciare, Jean; Burrows, John P.; Vrekoussis, Mihalis; Ervens, Barbara; Tsigaridis, Kostas; Facchini, Maria Cristina (Wiley-Blackwell, 2011-08-26)
      This paper presents results supporting the existence of a natural source of oxalic acid over the oceans. Oxalate was detected in "clean-sector" marine aerosol samples at Mace Head (Ireland) (53 degrees ...

    • Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation 

      Spracklen, D. V.; Carslaw, K. S.; Merikanto, J.; Mann, G. W.; Reddington, C. L.; Pickering, S.; Ogren, J. A.; Andrews, E.; Baltensperger, U.; Weingartner, E.; Boy, M.; Kulmala, M.; Laakso, L.; Lihavainen, H.; Kivekäs, N.; Komppula, M.; Mihalopoulos, N.; Kouvarakis, G.; Jennings, S. G.; O'Dowd, C.; Birmili, W.; Wiedensohler, A.; Weller, R.; Gras, J.; Laj, P.; Sellegri, K.; Bonn, B.; Krejci, R.; Laaksonen, A.; Hamed, A.; Minikin, A.; Harrison, R. M.; Talbot, R.; Sun, J. (Copernicus GmbH, 2010-05-26)
      We synthesised observations of total particle number (CN) concentration from 36 sites around the world. We found that annual mean CN concentrations are typically 300-2000 cm(-3) in the marine boundary layer and free ...

    • Growth rates during coastal and marine new particle formation in western ireland 

      Ehn, Mikael; Vuollekoski, Henri; Petäjä, Tuukka; Kerminen, Veli-Matti; Vana, Marko; Aalto, Pasi; de Leeuw, Gerrit; Ceburnis, Darius; Dupuy, Regis; O'Dowd, Colin D.; Kulmala, Markku (Wiley-Blackwell, 2010-09-28)
      Growth rates of new particles during coastal and marine secondary aerosol particle formation events were studied in western Ireland, both at the Mace Head atmospheric research station and onboard the R/V Celtic Explorer ...

    • Iodine dioxide nucleation simulations in coastal and remote marine environments 

      Vuollekoski, H.; Kerminen, V.-M.; Anttila, T.; Sihto, S.-L.; Vana, M.; Ehn, M.; Korhonen, H.; McFiggans, G.; O'Dowd, C. D.; Kulmala, M. (Wiley-Blackwell, 2009-01-27)
      Aerosol dynamical box model simulations of coastal new particle formation were performed in order to investigate the nucleation and growth mechanisms in this environment. In the simulations the nucleating vapor was assumed ...

    • Megacities and large urban agglomerations in the coastal zone: interactions between atmosphere, land, and marine ecosystems 

      von Glasow, Roland; Jickells, Tim D.; Baklanov, Alexander; Carmichael, Gregory R.; Church, Tom M.; Gallardo, Laura; Hughes, Claire; Kanakidou, Maria; Liss, Peter S.; Mee, Laurence; Raine, Robin; Ramachandran, Purvaja; Ramesh, R.; Sundseth, Kyrre; Tsunogai, Urumu; Uematsu, Mitsuo; Zhu, Tong (Springer Nature, 2012-10-18)
      Megacities are not only important drivers for socio-economic development but also sources of environmental challenges. Many megacities and large urban agglomerations are located in the coastal zone where land, atmosphere, ...

    • Modelling the contribution of sea salt and dimethyl sulfide derived aerosol to marine ccn 

      Yoon, Y. J.; Brimblecombe, P. (Copernicus GmbH, 2002-01-14)
      The concentration of cloud condensation nuclei (CCN) in the marine boundary layer (MBL) was estimated from dimethyl sulfide (DMS) flux, sea salt (SS) emission, and aerosols entrained from the free troposphere (FT). Only ...

    • New particle formation: nucleation rates and spatial scales in the clean marine coastal environment 

      O'Dowd, Colin D.; Geever, Michael; Hill, Martin K.; Smith, Michael H.; Jennings, S. Gerard (Wiley-Blackwell, 1998-05-15)
      Nucleation of new, ultra-fine, aerosol particles has been observed in the clean marine coastal atmosphere under a variety of conditions. These nucleation events were observed to occur frequently over spatial scales 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 spatial distribution and evolution of ultrafine particles in barcelona 

      Dall'Osto, M.; Querol, X.; Alastuey, A.; O'Dowd, C.; Harrison, R. M.; Wenger, J.; Gómez-Moreno, F. J. (Copernicus GmbH, 2013-01-21)
      Sources and evolution of ultrafine particles were investigated both horizontally and vertically in the large urban agglomerate of Barcelona, Spain. Within the SAPUSS project (Solving Aerosol Problems by Using Synergistic ...

    • Satellite and in situ salinity: understanding near-surface stratification and subfootprint variability 

      Boutin, J.; Chao, Y.; Asher, W. E.; Delcroix, T.; Drucker, R.; Drushka, K.; Kolodziejczyk, N.; Lee, T.; Reul, N.; Reverdin, G.; Schanze, J.; Soloviev, A.; Yu, L.; Anderson, J.; Brucker, L.; Dinnat, E.; Santos-Garcia, A.; Jones, W. L.; Maes, C.; Meissner, T.; Tang, W.; Vinogradova, N.; Ward, B. (American Meteorological Society, 2016-08-01)
      Remote sensing of salinity using satellite-mounted microwave radiometers provides new perspectives for studying ocean dynamics and the global hydrological cycle. Calibration and validation of these measurements is challenging ...

    • Submicron ne atlantic marine aerosol chemical composition and abundance: seasonal trends and air mass categorization 

      Ovadnevaite, Jurgita; Ceburnis, Darius; Leinert, Stephan; Dall'Osto, Manuel; Canagaratna, Manjula; O'Doherty, Simon; Berresheim, Harald; O'Dowd, Colin (Wiley-Blackwell, 2014-10-18)
      Three years of continuous Aerosol Mass Spectrometry measurements at the Mace Head Global Atmosphere Watch research station revealed seasonal patterns in the chemical composition of submicron NE Atlantic marine aerosol as ...

    • The composition of nucleation and aitken modes particles during coastal nucleation events: evidence for marine secondary organic contribution 

      Vaattovaara, P.; Huttunen, P. E.; Yoon, Y. J.; Joutsensaari, J.; Lehtinen, K. E. J.; O'Dowd, C. D.; Laaksonen, A. (Copernicus GmbH, 2006-10-12)
      Newly-formed nanometer-sized particles have been observed at coastal and marine environments world wide. Organic species have so far not been detected in those newly-formed nucleation mode particles. In this study, we ...