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| Titel |
The FIONA campaign (EUPHORE): Formal Intercomparison of Observations of Nitrous Acid |
| VerfasserIn |
Milagros Ródenas, Amalia Muñoz, Francisco Alacreu |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053456
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| Zusammenfassung |
| HONO is an important radical source; nevertheless, its chemistry in the atmosphere is not
well understood. A better knowledge of HONO formation and its role as a source of
OH-radicals is highly desirable for the improvement of air pollution models, many of
which do not currently include HONO production mechanisms. One reason for the
uncertainties in the atmospheric role of HONO is the difficulty in measuring this
species.
To elucidate both aspects - chemical and instrumental issues - a campaign was carried out
at EUPHORE in May 2010. It provided a large and well-mixed gas volume for the
simultaneous operation of multiple instruments under nearly-real controlled conditions.
The scenarios were 10 experiments accounting for typical urban and semi-rural
conditions. In this line, the following topics were addressed: i) Intercomparison of
techniques, ii) Study of interferences (aerosols, nitrates, NO2, etc) iii) HONO sources
(nitrophenols, vehicle emissions, ambient air, etc). The first 3 experiments were part of an
open-informal intercomparison and the rest of the experiments were part of a formal blind
intercomparison with an external referee. The extensive participant list included
the majority of groups working in this area globally, running simultaneously 19
techniques/instruments that covered nearly the whole range of techniques capable of
measuring HONO. These included Spectroscopic instruments, denuders and wet
chemicals.
We present an overview of the campaign in terms of participants, instruments,
logistics, definition of experiments, etc., as well as the results of selected experiments. |
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