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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2017

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Sources of atmospheric nitrous acid (HONO) in the European High Arctic

Anno di pubblicazione: 2017

Formato: Elettronico

Autori: Spataro F.; Ianniello A.; Salvatori R.; Nardino M.; Esposito G.; Montagnoli M.

Affiliazioni autori: CNR-Institute of Atmospheric Pollution Research, Via Salaria Km 29.3, CP10, Monterotondo S., Rome, 00015, Italy; CNR-Institute for Biometeorology, Via Gobetti 101, Bologna, 40129, Italy

Autori CNR:

  • GIULIO ESPOSITO
  • ANTONIETTA IANNIELLO
  • MAURO MONTAGNOLI
  • ROSAMARIA SALVATORI
  • FRANCESCA SPATARO

Lingua: inglese

Abstract: The atmospheric concentrations of nitrous acid (HONO) have been measured from 15 to 25 April 2010 at Ny-Ålesund (Svalbard). The results were discussed from the stand point of diurnal variations and meteorological effects. No clear diurnal cycle for the HONO concentrations was observed during our measurements. HONO concentration showed strong and significant correlation with both nitrogen dioxide (NO2) and relative humidity (RH), suggesting the importance of heterogeneous processes as HONO source. The strong correlation between HONO and HONO to NO2 ratio suggested the occurrence of heterogeneous conversion from NO2 to HONO, or HONO direct emission processes, or both. We used a pseudo steady state approach, including homogeneous and heterogeneous reactions and the emissive fluxes of HONO from the snow surface. It allowed accounting for all observed HONO concentrations only from small period. Except on them, about 28 % of the measured HONO was explained. The results showed that the heterogeneous conversion of NO2 on humid surface was a major HONO source, especially during the night. However, the results indicated the occurrence of a daytime HONO source whose strength was enough to compete with the HONO photolysis.

Lingua abstract: inglese

Pagine da: 25

Pagine a: 33

Pagine totali: 9

Rivista:

Rendiconti lincei. Scienze fisiche e naturali Springer Verlag Italia
Paese di pubblicazione: Italia
Lingua: inglese
ISSN: 2037-4631

Numero volume: 28

DOI: 10.1007/s12210-016-0568-9

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Indicizzato da: Scopus [2-s2.0-84988710971]

Parole chiave:

  • Nitrous acid
  • Nitrogen oxides
  • Atmospheric chemistry
  • Air-snow exchanges

URL: http://link.springer.com/article/10.1007/s12210-016-0568-9

Data di accettazione: 06/09/2016

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