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From the same journal

Space-based constraints on the production of nitric oxide by lightning

Research output: Contribution to journalLiterature review

Published copy (DOI)

Author(s)

  • Randall V. Martin
  • Bastien Sauvage
  • Ian Folkins
  • Christopher E. Sioris
  • Christopher Boone
  • Peter Bernath
  • Jerry Ziemke

Department/unit(s)

Publication details

JournalJournal of Geophysical Research
DatePublished - 11 May 2007
Issue numberD9
Volume112
Number of pages14
Pages (from-to)-
Original languageEnglish

Abstract

We interpret observations of trace-gases from three satellite platforms to provide top-down constraints on the production of NO by lightning. The space-based observations are tropospheric NO2 columns from SCIAMACHY, tropospheric O-3 columns from OMI and MLS, and upper tropospheric HNO3 from ACE-FTS. A global chemical transport model ( GEOS-Chem) is used to identify locations and time periods in which lightning would be expected to dominate the trace gas observations. The satellite observations are sampled at those locations and time periods. All three observations exhibit a maximum in the tropical Atlantic region and a minimum in the tropical Pacific. This wave-1 pattern is driven by injection of lightning NO into the upper troposphere over the tropical continents, followed by photochemical production of NO2, HNO3, and O-3 during transport. Lightning produces a broad enhancement over the tropical Atlantic and Africa of 2-6 x 10(14) molecules NO2 cm(-2), 4 x 10(17) molecules O-3 cm(-2) ( 15 Dobson Units), and 125 pptv of upper tropospheric HNO3. The lightning background is 25-50% weaker over the tropical Pacific. A global source of 6 +/- 2 Tg N yr(-1) from lightning in the model best represents the satellite observations of tropospheric NO2, O-3, and HNO3.

    Research areas

  • TROPICAL TROPOSPHERIC OZONE, OPTICAL TRANSIENT DETECTOR, UNITED-STATES, SATELLITE-OBSERVATIONS, ATMOSPHERIC CHEMISTRY, MAPPING SPECTROMETER, NOX PRODUCTION, MONITORING INSTRUMENT, AIRCRAFT MEASUREMENTS, GLOBAL DISTRIBUTION

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