Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns
Nitrous acid measurements were carried out during the MEGAPOLI summer and winter field campaigns at SIRTA observatory in Paris surroundings. Highly variable HONO levels were observed during the campaigns, ranging from 10 ppt to 500 ppt in summer and from 10 ppt to 1.7 ppb in winter. Significant HONO...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/14/2805/2014/acp-14-2805-2014.pdf |
| _version_ | 1818081391690121216 |
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| author | V. Michoud A. Colomb A. Borbon K. Miet M. Beekmann M. Camredon B. Aumont S. Perrier P. Zapf G. Siour W. Ait-Helal C. Afif A. Kukui M. Furger J. C. Dupont M. Haeffelin J. F. Doussin |
| author_facet | V. Michoud A. Colomb A. Borbon K. Miet M. Beekmann M. Camredon B. Aumont S. Perrier P. Zapf G. Siour W. Ait-Helal C. Afif A. Kukui M. Furger J. C. Dupont M. Haeffelin J. F. Doussin |
| author_sort | V. Michoud |
| collection | DOAJ |
| description | Nitrous acid measurements were carried out during the MEGAPOLI summer and
winter field campaigns at SIRTA observatory in Paris surroundings. Highly
variable HONO levels were observed during the campaigns, ranging from 10 ppt
to 500 ppt in summer and from 10 ppt to 1.7 ppb in winter. Significant HONO
mixing ratios have also been measured during daytime hours, comprised
between some tenth of ppt and 200 ppt for the summer campaign and between
few ppt and 1 ppb for the winter campaign. Ancillary measurements, such as
NO<sub>x</sub>, O<sub>3</sub>, photolysis frequencies, meteorological parameters
(pressure, temperature, relative humidity, wind speed and wind direction),
black carbon concentration, total aerosol surface area, boundary layer
height and soil moisture, were conducted during both campaigns. In addition,
for the summer period, OH radical measurements were made with a CIMS
(Chemical Ionisation Mass Spectrometer). This large dataset has been used to
investigate the HONO budget in a suburban environment. To do so,
calculations of HONO concentrations using PhotoStationary State (PSS)
approach have been performed, for daytime hours. The comparison of these
calculations with measured HONO concentrations revealed an underestimation
of the calculations making evident a missing source term for both campaigns.
This unknown HONO source exhibits a bell-shaped like average diurnal profile
with a maximum around noon of approximately 0.7 ppb h<sup>−1</sup> and 0.25 ppb h<sup>−1</sup>,
during summer and winter respectively. This source is the main
HONO source during daytime hours for both campaigns. In both cases, this
source shows a slight positive correlation with <i>J</i>(NO<sub>2</sub>) and the product
between <i>J</i>(NO<sub>2</sub>) and soil moisture. This original approach had, thus,
indicated that this missing source is photolytic and might be heterogeneous
occurring at ground surface and involving water content available on the
ground. |
| first_indexed | 2024-12-10T19:05:28Z |
| format | Article |
| id | doaj.art-78874c5aa19f45d2979fcbe3f3c630ea |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-10T19:05:28Z |
| publishDate | 2014-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-78874c5aa19f45d2979fcbe3f3c630ea2022-12-22T01:36:54ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242014-03-011462805282210.5194/acp-14-2805-2014Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaignsV. Michoud0A. Colomb1A. Borbon2K. Miet3M. Beekmann4M. Camredon5B. Aumont6S. Perrier7P. Zapf8G. Siour9W. Ait-Helal10C. Afif11A. Kukui12M. Furger13J. C. Dupont14M. Haeffelin15J. F. Doussin16LISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLaMP, UMR-CNRS 6016, Clermont Université, Université Blaise Pascal, Aubière, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceLATMOS, UMR-CNRS 8190, Université de Versailles Saint Quentin, Université Pierre et Marie Curie, Guyancourt, FranceLaboratory of Atmospheric Chemistry, Paul Scherrer Institut, Villigen, SwitzerlandInstitut Pierre Simon Laplace (IPSL), Palaiseau, FranceInstitut Pierre Simon Laplace (IPSL), Palaiseau, FranceLISA, UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, FranceNitrous acid measurements were carried out during the MEGAPOLI summer and winter field campaigns at SIRTA observatory in Paris surroundings. Highly variable HONO levels were observed during the campaigns, ranging from 10 ppt to 500 ppt in summer and from 10 ppt to 1.7 ppb in winter. Significant HONO mixing ratios have also been measured during daytime hours, comprised between some tenth of ppt and 200 ppt for the summer campaign and between few ppt and 1 ppb for the winter campaign. Ancillary measurements, such as NO<sub>x</sub>, O<sub>3</sub>, photolysis frequencies, meteorological parameters (pressure, temperature, relative humidity, wind speed and wind direction), black carbon concentration, total aerosol surface area, boundary layer height and soil moisture, were conducted during both campaigns. In addition, for the summer period, OH radical measurements were made with a CIMS (Chemical Ionisation Mass Spectrometer). This large dataset has been used to investigate the HONO budget in a suburban environment. To do so, calculations of HONO concentrations using PhotoStationary State (PSS) approach have been performed, for daytime hours. The comparison of these calculations with measured HONO concentrations revealed an underestimation of the calculations making evident a missing source term for both campaigns. This unknown HONO source exhibits a bell-shaped like average diurnal profile with a maximum around noon of approximately 0.7 ppb h<sup>−1</sup> and 0.25 ppb h<sup>−1</sup>, during summer and winter respectively. This source is the main HONO source during daytime hours for both campaigns. In both cases, this source shows a slight positive correlation with <i>J</i>(NO<sub>2</sub>) and the product between <i>J</i>(NO<sub>2</sub>) and soil moisture. This original approach had, thus, indicated that this missing source is photolytic and might be heterogeneous occurring at ground surface and involving water content available on the ground.http://www.atmos-chem-phys.net/14/2805/2014/acp-14-2805-2014.pdf |
| spellingShingle | V. Michoud A. Colomb A. Borbon K. Miet M. Beekmann M. Camredon B. Aumont S. Perrier P. Zapf G. Siour W. Ait-Helal C. Afif A. Kukui M. Furger J. C. Dupont M. Haeffelin J. F. Doussin Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns Atmospheric Chemistry and Physics |
| title | Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns |
| title_full | Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns |
| title_fullStr | Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns |
| title_full_unstemmed | Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns |
| title_short | Study of the unknown HONO daytime source at a European suburban site during the MEGAPOLI summer and winter field campaigns |
| title_sort | study of the unknown hono daytime source at a european suburban site during the megapoli summer and winter field campaigns |
| url | http://www.atmos-chem-phys.net/14/2805/2014/acp-14-2805-2014.pdf |
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