Summary:

Ozonesonde launches were made by the Southern Hemisphere ADditional OZonesondes (SHADOZ) group as part of the SAFARI 2000 Dry Season Campaign in September 2000 (Thompson et al., 2002) at Lusaka, Zambia. Launches from on-going SHADOZ regional sites at Irene (South Africa), La Réunion Island, and Ascension Island sites are also included. These ozonesonde data files contain profiles of ozone partial pressures, as well as temperature, pressure, and humidity values up to 35 km in altitude (around 5 hPa in pressure coordinates). These ozonsondes, which are a suite of balloon-borne instruments, capture the troposphere and lower stratospheric portion of the atmosphere. During the campaign, ozonesondes were launched daily at Lusaka during the height of the burning season and in a region of active biomass burning activity. Plots of sonde vertical profiles and air mass back trajectories are included.

Photographs taken during this research activity can be viewed at the S2K Photo Gallery.

Data Citation:

Cite this data set as follows:

Thompson, A., and J. Witte. 2004. SAFARI 2000 SHADOZ Ozonesonde Data, Zambia and Regional Sites, Dry Season 2000. Data set. Available on-line [http://daac.ornl.gov/] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/726.

References:

Thompson, A. M., J. C. Witte, R. D. McPeters, S. J. Oltmans, F. J. Schmidlin, J. A. Logan, M. Fujiwara, V. W. J. H. Kirchhoff, F. Posny, G. J. R. Coetzee, B. Hoegger, S. Kawakami, T. Ogawa, B. J. Johnson, H. Vomel, and G. Labow. 2003. Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998-2000 tropical ozone climatology 1. Comparison with Total Ozone Mapping Spectrometer (TOMS) and ground-based measurements, J. Geophys. Res., Vol. 108 No. D2, 8241, doi: 10.1029/2002JD002241.

Thompson, A. M., J. C. Witte, M. T. Freiman, A. Phahlane, and G. J. R. Coetzee. 2002. Lusaka, Zambia, during SAFARI-2000: Convergence of local and imported ozone pollution, Geophys. Res. Lett., 29, 1976, doi: 10.1029/2002GL015399.

Thompson, A. M., B. G. Doddridge, J. C. Witte, R. D. Hudson, W. T. Luke, J. E. Johnson, B. J. Johnson, S. J. Oltmans, and R. Weller. 2000. A tropical Atlantic ozone paradox: Shipboard and satellite views of a tropospheric ozone maximum and wave-one in January-February 1999, Geophys. Res. Lett., 27, 3317-3320.

Data Format:

The data files are stored as ASCII table files, one file per flight, in space-separated-value format. Files with the letter 'b' after the date are the second launch on that day. The data files and the .gif files of vertical profile plots and air mass trajectory images are compressed in a separate .zip file per measurement site.

Lusaka, Zambia Flights - September 2000

Ascension Island Observatory Flights - August and November 2000

Irene, South Africa Station - August to November 2000

La Réunion Observatory - August to November 2000

Data File Format

The data files have descriptive headers, followed by the data records, as shown in the following sample header from a SAFARI data file.

The files contain data records with the following columns.

Column	Label	Definition	Units
1	Press	Air pressure	hPa
2	Alt	Altitude	km
3	Temp	Temperature	degrees Celsius
4	RH	Relative Humidity	%
5	O3	Ozone Partial Pressure	nbar
6	O3	Ozone Mixing Ratio	ppmv

Additional information about the ozonesonde measurements, data formats, and example vertical profile plots and air mass trajectory images, are found in the companion file: http://daac.ornl.gov/daacdata/safari2k/atmospheric/shadoz_ozonesonde/comp/shadoz_ozonesondes_readme.pdf

Document Information:

2004/6/16

Document Review Date:

2004/6/16

Document Curator:

webmaster@www.daac.ornl.gov

Document URL: