Partitioning and budget of NOy species during the Mauna Loa Observatory Photochemistry Experiment

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Abstract

The most abundant component of NOy was nitric acid, its median contribution to NOy in free tropospheric samples was 43%. The large fraction of HNO3 is consistent with the long transport times and photochemical processing of air masses reaching the mid-Pacific site as well as possible stratospheric input of NOy. The median contribution of NOx to NOy in the free troposphere near 3.4 km was ~14%. PAN and other measured organic nitrates contributed <7% to NOy. The median sum of the individually measured species was 102% of NOy in upslope periods which consist of a mixture of island-modified marine boundary layer and free tropospheric air. This total was 75% of NOy during downslope periods representative of the free troposphere. This shortfall in the odd-nitrogen budget in the free troposphere corresponds to 72 pptv of reactive nitrogen, which is over 2 times median NOx. -from Authors

Original languageEnglish (US)
JournalJournal of Geophysical Research
Volume97
Issue numberD10
StatePublished - 1992
Externally publishedYes

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Troposphere
Photochemical reactions
photochemistry
Observatories
budgets
photochemical reactions
troposphere
observatories
partitioning
observatory
Nitrogen
Nitric Acid
Upper atmosphere
organic nitrates
experiment
Experiments
nitrogen
Air
nitric acid
Nitrates

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

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title = "Partitioning and budget of NOy species during the Mauna Loa Observatory Photochemistry Experiment",
abstract = "The most abundant component of NOy was nitric acid, its median contribution to NOy in free tropospheric samples was 43{\%}. The large fraction of HNO3 is consistent with the long transport times and photochemical processing of air masses reaching the mid-Pacific site as well as possible stratospheric input of NOy. The median contribution of NOx to NOy in the free troposphere near 3.4 km was ~14{\%}. PAN and other measured organic nitrates contributed <7{\%} to NOy. The median sum of the individually measured species was 102{\%} of NOy in upslope periods which consist of a mixture of island-modified marine boundary layer and free tropospheric air. This total was 75{\%} of NOy during downslope periods representative of the free troposphere. This shortfall in the odd-nitrogen budget in the free troposphere corresponds to 72 pptv of reactive nitrogen, which is over 2 times median NOx. -from Authors",
author = "Atlas, {Elliot L}",
year = "1992",
language = "English (US)",
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journal = "Journal of Geophysical Research: Oceans",
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T1 - Partitioning and budget of NOy species during the Mauna Loa Observatory Photochemistry Experiment

AU - Atlas, Elliot L

PY - 1992

Y1 - 1992

N2 - The most abundant component of NOy was nitric acid, its median contribution to NOy in free tropospheric samples was 43%. The large fraction of HNO3 is consistent with the long transport times and photochemical processing of air masses reaching the mid-Pacific site as well as possible stratospheric input of NOy. The median contribution of NOx to NOy in the free troposphere near 3.4 km was ~14%. PAN and other measured organic nitrates contributed <7% to NOy. The median sum of the individually measured species was 102% of NOy in upslope periods which consist of a mixture of island-modified marine boundary layer and free tropospheric air. This total was 75% of NOy during downslope periods representative of the free troposphere. This shortfall in the odd-nitrogen budget in the free troposphere corresponds to 72 pptv of reactive nitrogen, which is over 2 times median NOx. -from Authors

AB - The most abundant component of NOy was nitric acid, its median contribution to NOy in free tropospheric samples was 43%. The large fraction of HNO3 is consistent with the long transport times and photochemical processing of air masses reaching the mid-Pacific site as well as possible stratospheric input of NOy. The median contribution of NOx to NOy in the free troposphere near 3.4 km was ~14%. PAN and other measured organic nitrates contributed <7% to NOy. The median sum of the individually measured species was 102% of NOy in upslope periods which consist of a mixture of island-modified marine boundary layer and free tropospheric air. This total was 75% of NOy during downslope periods representative of the free troposphere. This shortfall in the odd-nitrogen budget in the free troposphere corresponds to 72 pptv of reactive nitrogen, which is over 2 times median NOx. -from Authors

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