Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive
Three weeks of summertime surface-based chemical and meteorological observations at Sable Island, Nova Scotia, during the North Atlantic Regional Experiment (NARE) 1993 summer intensive are used to study instantaneous photochemical production and loss rates of ozone by means of a numerical photochem...
Published in: | Journal of Geophysical Research: Atmospheres |
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1998
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Online Access: | https://escholarship.org/uc/item/61w142kp https://escholarship.org/content/qt61w142kp/qt61w142kp.pdf https://doi.org/10.1029/98jd00397 |
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ftcdlib:oai:escholarship.org:ark:/13030/qt61w142kp 2024-09-15T18:22:54+00:00 Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive Duderstadt, KA Carroll, MA Sillman, S Wang, T Albercook, GM Feng, L Parrish, DD Holloway, JS Fehsenfeld, FC Blake, DR Blake, NJ Forbes, G 13531 - 13555 1998-06-20 application/pdf https://escholarship.org/uc/item/61w142kp https://escholarship.org/content/qt61w142kp/qt61w142kp.pdf https://doi.org/10.1029/98jd00397 unknown eScholarship, University of California qt61w142kp https://escholarship.org/uc/item/61w142kp https://escholarship.org/content/qt61w142kp/qt61w142kp.pdf doi:10.1029/98jd00397 CC-BY Journal of Geophysical Research, vol 103, iss D11 Meteorology & Atmospheric Sciences article 1998 ftcdlib https://doi.org/10.1029/98jd00397 2024-06-28T06:28:20Z Three weeks of summertime surface-based chemical and meteorological observations at Sable Island, Nova Scotia, during the North Atlantic Regional Experiment (NARE) 1993 summer intensive are used to study instantaneous photochemical production and loss rates of ozone by means of a numerical photochemical model. Results are most sensitive to the averaging scheme of data used to constrain the model and the ambient variability of the measurements. Model simulations driven by a time series of 5 min averaged data, most representative of the chemistry at the site, yield an average net photochemical ozone production of 3.6 ppbv/d. Estimates of net ozone production designed to filter out local sources, by using 1000-1400 LT median values of observations to drive the model and by excluding short-lived hydrocarbons, give values ranging from 1 to 4 ppbv/d. These positive values of net ozone production within the marine boundary layer over Sable Island demonstrate the impact of polluted continental plumes on the background photochemistry of the region during the intensive. The dominant ambient variables controlling photochemical production and loss rates of zone at the site during the measurement campaign appear to be levels of nitrogen oxides, ozone, nonmethane hydrocarbons, and solar intensity determined by cloud cover. The model partitioning of nitrogen oxides agrees for the most part with measurements, lending credence to calculated photochemical production and loss rates of ozone as well as inferred levels of peroxy radicals not measured at the site. Discrepancies, however, often occur during episodes of intermittent cloud cover, fog, and rain, suggesting the influence of cloud processes on air masses reaching the site. Article in Journal/Newspaper North Atlantic University of California: eScholarship Journal of Geophysical Research: Atmospheres 103 D11 13531 13555 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Meteorology & Atmospheric Sciences |
spellingShingle |
Meteorology & Atmospheric Sciences Duderstadt, KA Carroll, MA Sillman, S Wang, T Albercook, GM Feng, L Parrish, DD Holloway, JS Fehsenfeld, FC Blake, DR Blake, NJ Forbes, G Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive |
topic_facet |
Meteorology & Atmospheric Sciences |
description |
Three weeks of summertime surface-based chemical and meteorological observations at Sable Island, Nova Scotia, during the North Atlantic Regional Experiment (NARE) 1993 summer intensive are used to study instantaneous photochemical production and loss rates of ozone by means of a numerical photochemical model. Results are most sensitive to the averaging scheme of data used to constrain the model and the ambient variability of the measurements. Model simulations driven by a time series of 5 min averaged data, most representative of the chemistry at the site, yield an average net photochemical ozone production of 3.6 ppbv/d. Estimates of net ozone production designed to filter out local sources, by using 1000-1400 LT median values of observations to drive the model and by excluding short-lived hydrocarbons, give values ranging from 1 to 4 ppbv/d. These positive values of net ozone production within the marine boundary layer over Sable Island demonstrate the impact of polluted continental plumes on the background photochemistry of the region during the intensive. The dominant ambient variables controlling photochemical production and loss rates of zone at the site during the measurement campaign appear to be levels of nitrogen oxides, ozone, nonmethane hydrocarbons, and solar intensity determined by cloud cover. The model partitioning of nitrogen oxides agrees for the most part with measurements, lending credence to calculated photochemical production and loss rates of ozone as well as inferred levels of peroxy radicals not measured at the site. Discrepancies, however, often occur during episodes of intermittent cloud cover, fog, and rain, suggesting the influence of cloud processes on air masses reaching the site. |
format |
Article in Journal/Newspaper |
author |
Duderstadt, KA Carroll, MA Sillman, S Wang, T Albercook, GM Feng, L Parrish, DD Holloway, JS Fehsenfeld, FC Blake, DR Blake, NJ Forbes, G |
author_facet |
Duderstadt, KA Carroll, MA Sillman, S Wang, T Albercook, GM Feng, L Parrish, DD Holloway, JS Fehsenfeld, FC Blake, DR Blake, NJ Forbes, G |
author_sort |
Duderstadt, KA |
title |
Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive |
title_short |
Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive |
title_full |
Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive |
title_fullStr |
Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive |
title_full_unstemmed |
Photochemical production and loss rates of ozone at Sable Island, Nova Scotia during the North Atlantic Regional Experiment (NARE) 1993 summer intensive |
title_sort |
photochemical production and loss rates of ozone at sable island, nova scotia during the north atlantic regional experiment (nare) 1993 summer intensive |
publisher |
eScholarship, University of California |
publishDate |
1998 |
url |
https://escholarship.org/uc/item/61w142kp https://escholarship.org/content/qt61w142kp/qt61w142kp.pdf https://doi.org/10.1029/98jd00397 |
op_coverage |
13531 - 13555 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Geophysical Research, vol 103, iss D11 |
op_relation |
qt61w142kp https://escholarship.org/uc/item/61w142kp https://escholarship.org/content/qt61w142kp/qt61w142kp.pdf doi:10.1029/98jd00397 |
op_rights |
CC-BY |
op_doi |
https://doi.org/10.1029/98jd00397 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
103 |
container_issue |
D11 |
container_start_page |
13531 |
op_container_end_page |
13555 |
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1810462946480881664 |