NDLI: Shipboard and satellite views of elevated tropospheric ozone over the tropical atlantic in january-february 1999

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Shipboard and satellite views of elevated tropospheric ozone over the tropical atlantic in january-february 1999

Content Provider	NASA Technical Reports Server (NTRS)
Author	Doddridge, Bruce G. Johnson, James E. Hudson, Robert D. Witte, Jacquelyn C. Oltmans, Samuel J. Luke, Winston T. Johnson, Bryan J. Thompson, Anne M.
Copyright Year	1999
Description	During the Aerosols99 trans-Atlantic cruise from Norfolk, VA, to Cape Town, South Africa, daily ozonesondes were launched from the NOAA R/V Ronald H Brown between 17 January and 6 February l999. A composite of tropospheric ozone profiles along the latitudinal transect shows 4 zones, which are interpreted using correlative shipboard ozone, CO, water vapor, and overhead aerosol optical thickness measurements. Elevated ozone associated with biomass burning north of the ITCZ (Intertropical Convergence Zone) is prominent at 3-5 km from 10-0N, but even higher ozone (100 ppbv, 7-10 km) occurred south of the ITCZ, where it was not burning. Column-integrated tropospheric ozone was 44 Dobson Units (DU) in one sounding, 10 DU lower than the maximum in a January-February 1993 Atlantic cruise with ozonesondes [Weller et al., 1996]. TOMS tropospheric ozone shows elevated ozone extending throughout the tropical Atlantic in January 1999. Several explanations are considered. Back trajectories, satellite aerosol observations and shipboard tracers suggest a combination of convection and interhemispheric transport of ozone and/or ozone precursors, probably amplified by a lightning NO source over Africa.
File Size	647678
Page Count	18
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20000013960
Archival Resource Key	ark:/13960/t2s51m42s
Language	English
Publisher Date	1999-11-16
Access Restriction	Open
Subject Keyword	Environment Pollution Tropical Regions Mixing Ratios Troposphere Aerosols Total Ozone Mapping Spectrometer Satellite Observation Ozone Optical Thickness Remote Sensing Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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