Night-time radical chemistry during the NAMBLEX campaign
International audience Night-time chemistry in the Marine Boundary Layer has been modelled using a number of observationally constrained zero-dimensional box-models. The models were based upon the Master Chemical Mechanism (MCM) and the measurements were taken during the North Atlantic Marine Bounda...
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ftccsdartic:oai:HAL:hal-00296135v1 2023-11-12T04:22:32+01:00 Night-time radical chemistry during the NAMBLEX campaign Sommariva, R. Pilling, M. J. Bloss, W. J. Heard, D. E. Lee, J. D. Fleming, Z. L. Monks, P. S. Plane, J. M. C. Saiz-Lopez, A. Ball, S. M. Bitter, M. Jones, R. L. Brough, N. Penkett, S. A. Hopkins, J. R. Lewis, A. C. Read, K. A. School of Chemistry Department of Chemistry School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) University Chemical Laboratory 2007-02-07 https://hal.science/hal-00296135 https://hal.science/hal-00296135/document https://hal.science/hal-00296135/file/acp-7-587-2007.pdf en eng HAL CCSD European Geosciences Union hal-00296135 https://hal.science/hal-00296135 https://hal.science/hal-00296135/document https://hal.science/hal-00296135/file/acp-7-587-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296135 Atmospheric Chemistry and Physics, 2007, 7 (3), pp.587-598 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2023-10-21T23:17:07Z International audience Night-time chemistry in the Marine Boundary Layer has been modelled using a number of observationally constrained zero-dimensional box-models. The models were based upon the Master Chemical Mechanism (MCM) and the measurements were taken during the North Atlantic Marine Boundary Layer Experiment (NAMBLEX) campaign at Mace Head, Ireland in July?September 2002. The model could reproduce, within the combined uncertainties, the measured concentration of HO 2 (within 30?40%) during the night 31 August?1 September and of HO 2 +RO 2 (within 15?30%) during several nights of the campaign. The model always overestimated the NO 3 measurements made by Differential Optical Absorption Spectroscopy (DOAS) by up to an order of magnitude or more, but agreed with the NO 3 Cavity Ring-Down Spectroscopy (CRDS) measurements to within 30?50%. The most likely explanation of the discrepancy between the two instruments and the model is the reaction of the nitrate radical with inhomogeneously distributed NO, which was measured at concentrations of up to 10 ppt, even though this is not enough to fully explain the difference between the DOAS measurements and the model. A rate of production and destruction analysis showed that radicals were generated during the night mainly by the reaction of ozone with light alkenes. The cycling between HO 2 /RO 2 and OH was maintained during the night by the low concentrations of NO and the overall radical concentration was limited by slow loss of peroxy radicals to form peroxides. A strong peak in [NO 2 ] during the night 31 August?1 September allowed an insight into the radical fluxes and the connections between the HO x and the NO 3 cycles. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Mace ENVELOPE(155.883,155.883,-81.417,-81.417) Strong Peak ENVELOPE(-82.300,-82.300,-79.933,-79.933) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Sommariva, R. Pilling, M. J. Bloss, W. J. Heard, D. E. Lee, J. D. Fleming, Z. L. Monks, P. S. Plane, J. M. C. Saiz-Lopez, A. Ball, S. M. Bitter, M. Jones, R. L. Brough, N. Penkett, S. A. Hopkins, J. R. Lewis, A. C. Read, K. A. Night-time radical chemistry during the NAMBLEX campaign |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Night-time chemistry in the Marine Boundary Layer has been modelled using a number of observationally constrained zero-dimensional box-models. The models were based upon the Master Chemical Mechanism (MCM) and the measurements were taken during the North Atlantic Marine Boundary Layer Experiment (NAMBLEX) campaign at Mace Head, Ireland in July?September 2002. The model could reproduce, within the combined uncertainties, the measured concentration of HO 2 (within 30?40%) during the night 31 August?1 September and of HO 2 +RO 2 (within 15?30%) during several nights of the campaign. The model always overestimated the NO 3 measurements made by Differential Optical Absorption Spectroscopy (DOAS) by up to an order of magnitude or more, but agreed with the NO 3 Cavity Ring-Down Spectroscopy (CRDS) measurements to within 30?50%. The most likely explanation of the discrepancy between the two instruments and the model is the reaction of the nitrate radical with inhomogeneously distributed NO, which was measured at concentrations of up to 10 ppt, even though this is not enough to fully explain the difference between the DOAS measurements and the model. A rate of production and destruction analysis showed that radicals were generated during the night mainly by the reaction of ozone with light alkenes. The cycling between HO 2 /RO 2 and OH was maintained during the night by the low concentrations of NO and the overall radical concentration was limited by slow loss of peroxy radicals to form peroxides. A strong peak in [NO 2 ] during the night 31 August?1 September allowed an insight into the radical fluxes and the connections between the HO x and the NO 3 cycles. |
author2 |
School of Chemistry Department of Chemistry School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) University Chemical Laboratory |
format |
Article in Journal/Newspaper |
author |
Sommariva, R. Pilling, M. J. Bloss, W. J. Heard, D. E. Lee, J. D. Fleming, Z. L. Monks, P. S. Plane, J. M. C. Saiz-Lopez, A. Ball, S. M. Bitter, M. Jones, R. L. Brough, N. Penkett, S. A. Hopkins, J. R. Lewis, A. C. Read, K. A. |
author_facet |
Sommariva, R. Pilling, M. J. Bloss, W. J. Heard, D. E. Lee, J. D. Fleming, Z. L. Monks, P. S. Plane, J. M. C. Saiz-Lopez, A. Ball, S. M. Bitter, M. Jones, R. L. Brough, N. Penkett, S. A. Hopkins, J. R. Lewis, A. C. Read, K. A. |
author_sort |
Sommariva, R. |
title |
Night-time radical chemistry during the NAMBLEX campaign |
title_short |
Night-time radical chemistry during the NAMBLEX campaign |
title_full |
Night-time radical chemistry during the NAMBLEX campaign |
title_fullStr |
Night-time radical chemistry during the NAMBLEX campaign |
title_full_unstemmed |
Night-time radical chemistry during the NAMBLEX campaign |
title_sort |
night-time radical chemistry during the namblex campaign |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00296135 https://hal.science/hal-00296135/document https://hal.science/hal-00296135/file/acp-7-587-2007.pdf |
long_lat |
ENVELOPE(155.883,155.883,-81.417,-81.417) ENVELOPE(-82.300,-82.300,-79.933,-79.933) |
geographic |
Mace Strong Peak |
geographic_facet |
Mace Strong Peak |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296135 Atmospheric Chemistry and Physics, 2007, 7 (3), pp.587-598 |
op_relation |
hal-00296135 https://hal.science/hal-00296135 https://hal.science/hal-00296135/document https://hal.science/hal-00296135/file/acp-7-587-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782337558748856320 |