Intercontinental Chemical Transport Experiment Ozonesonde Network Study (IONS) 2004: 1. Summertime upper troposphere/lower stratosphere ozone over northeastern North America

Anne M. Thompson, Jesse B. Stone, Jacquelyn C. Witte, Sonya K. Miller, R. Bradley Pierce, Robert B. Chatfield, Samuel J. Oltmans, Owen R. Cooper, Amber L. Loucks, Brett F. Taubman, Bryan J. Johnson, Everette Joseph, Tom L. Kucsera, John T. Merrill, Gary A. Morris, Scott Hersey, Gerry Forbes, Michael J. Newchurch, F. J. Schmidlin, David W. TarasickValérie Thouret, Jean Pierre Cammas

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103 Scopus citations

Abstract

Coordinate ozonesonde launches from the Intercontinental Transport Experiment (INTEX) Ozonesonde Network Study (IONS) (http:// croc.gsfc.nasa.gov/intex/ions.html) in July-August 2004 provided nearly 300 O3 profiles from eleven North American sites and the R/V Ronald H. Brown in the Gulf of Maine. With the IONS period dominated by low-pressure conditions over northeastern North America (NENA), the free troposphere in that region was frequently enriched by stratospheric O3. Stratospheric O3 contributions to the NENA tropospheric O3 budget are computed through analyses of O3 laminae (Pierce and Grant, 1998; Teitelbaum et al., 1996), tracers (potential vorticity, water vapor), and trajectories. The lasting influence of stratospheric contribution into the troposphere is demonstrated, and the computed stratospheric contribution to tropospheric column O3 over the R/V Ronald H. Brown and six sites in Michigan, Virginia, Maryland, Rhode Island, and Nova Scotia, 23% ± 3%, is similar to summertime budgets derived from European O3 profiles (Collette and Ancellet, 2005). Analysis of potential vorticity, Wallops ozonesondes (37.9°N, 75.5°W), and Measurements of Ozone by Airbus Inservice Aircraft (MOZAIC) O3 profiles for NENA airports in June-July-August 1996-2004 shows that the stratospheric fraction in 2004 may be typical. Boundary layer O3 at Wallops and northeast U.S. sites during IONS also resembled O3 climatology (June-July-August 1996-2003). However, statistical classification of Wallops O3 profiles shows the frequency of profiles with background, nonpolluted boundary layer O3 was greater than normal during IONS.

Original languageEnglish (US)
Article numberD12S12
JournalJournal of Geophysical Research Atmospheres
Volume112
Issue number12
DOIs
StatePublished - Jun 27 2007

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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