Spatial and temporal variability of ultrafine aerosol fraction (nanoparticles) in Siberia

Autor: Àrshinov, Ì.Yu., Belan, B.D., Paris, J.D., Zadde, G.Î., Simonenkov, D.V.
Přispěvatelé: V.E. Zuev Institute of Atmospheric Optics (IAO), Siberian Branch of the Russian Academy of Sciences (SB RAS), Tomsk State University [Tomsk], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-RAMCES (ICOS-RAMCES), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Aptel, Florence
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Atmospheric and oceanic optics
Atmospheric and oceanic optics, V.E. Zuev Institute of Atmospheric Optics, 2008, 21 (12), pp.885-892
Atmospheric and oceanic optics, 2008, 21 (12), pp.885-892
ISSN: 0235-6880
Popis: International audience; Spatio-temporal variability of the ultrafine and fine particle formation over Siberia isdiscussed. An estimate of foreground processes in the nanoparticle formation has been done. Analysis of the nucleation processes in the free atmosphere shows that nucleation events were observed in 85% of all airborne soundings performed over Siberia. In 80% of cases, nanoparticle layers are formed between heights of 4 and 7 km. The layer thickness mainly varies between 0.5 and 2.0 km and sometimes it can reach 4 km. A simultaneous increase in concentrations of nanoparticles and ozone, stated earlier, appears with an equal probability of coincidence or non-coincidence of nanoparticle and ozone layers at all heights. The horizontal length of nanoparticle layers varies between tens and 600 km. The most probable length is 100–300 km (> 50% of cases). Minimum of monthly mean values of both total nano- and nucleation mode particle concentrations in the ground layer is observed in summer. Concentration of particles with diameters between 3 and 70 nm in free troposphere varies from 300 in summer to 30 cm–3 in winter. The number density of bigger particles (70 < d < 200 nm) varies between 10 (in winter) and 30 cm–3 (in summer). Nucleation in the atmospheric boundary layer and free troposphere occurs absolutely independently. Main sources of nanoparticle formation in the free atmosphere are nucleation and photochemical processes. Contributions of nucleation, photochemical and advective processes in the atmospheric boundary layer are comparable.
Databáze: OpenAIRE
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