Summary:

This data set contains particle size distributions and particle compositions for studying aerosol particles produced by savanna burning in southern Africa. We used analytical transmission electron microscopy (TEM), including energy-dispersive X-ray spectrometry (EDS) and electron energy-loss spectroscopy (EELS), to study aerosol particles from several smoke and haze samples and from a set of cloud samples. These aerosol particle samples were collected using the University of Washington Convair CV-580 research aircraft (Pósfai et al., 2003) during the dry season, August-September 2000.

Data Citation:

Cite this data set as follows:

Posfai M., R. Simonics, J. Li, P. R. Buseck, and P. V. Hobbs. 2004. SAFARI 2000 Physical and Chemical Properties of Aerosols, 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/725.

References:

Posfai, M., R. Simonics, J. Li, P. V. Hobbs, and P. R. Buseck. 2003. Individual aerosol particles from biomass burning in southern Africa: 1. Compositions and size distributions of carbonaceous particles, J. Geophys. Res. 108(D13), 8483, doi:10.1029/2002JD002291.

Posfai, M, A.Gelencser, R. Simonics, K. Arato, J. Li, P. V. Hobbs, and P. R. Buseck. Atmospheric tar balls: Particles from biomass and biofuel burning. Journal of Geophysical Research-Atmospheres 109 (D6): 6213-6213.

Li, J, M. Posfai, P. V. Hobbs, and P. R. Buseck. Individual aerosol particles from biomass burning in southern Africa: 2, Compositions and aging of inorganic particles. Journal of Geophysical Research-Atmospheres 108 (D13): 8484-8484, 2003

Data Format:

Two types of particle data in the data set, aerosol composition and particle size distribution data, were collected using the University of Washington Convair CV-580 research aircraft. There are data for the following flights:

• Flight 1815, 17 Aug. 2000, Kruger National Park, South Africa
• Flight 1816, 18 Aug. 2000, Madikwe Game Reserve, South Africa/ Botswana
• Flight 1825, 31 Aug. 2000, West of Beira, Mozambique
• Flight 1826, 01 Sept. 2000, Kaoma, Zambia
• Flight 1837, 13 Sept. 2000, Walvis Bay, off Namibian coast

Composition Data Files

These data files contain the atomic compositions of individual aerosol particles, as generated from EDS. These include:

• X-ray counts and derived atomic percents for C, O, Si, S, Cl, and K for each analyzed particle in 8 samples (ASCII comma-delimited files) and
• triangular plots, containing relative concentrations of selected elements, as determined by EDS analyses (GIF images).

The file names are "composition_XXXXX.csv," where XXXXX is the sample number (the first 2 numbers are the flight number, see the Data Samples Information Table in the companion file for details).

Size Distribution Data Files

These data files contain size distributions of particle types, as measured on TEM images, sorted by sample. These include:

• size distribution of particle types, as measured on TEM images (ASCII comma-delimited files); there are three different types of files (for the different particle types): organic, sulfate, and tarball; and
• data plots (GIF images).

The file names are "particle-type_XXXXX.csv," where particle-type is "organic", "sulfate", or "tarball", and XXXXX is the sample number (the first 2 numbers are the flight number, see the Data Samples Information Table in the companion file for details).

Companion Files

• Information about the data collection, experimental procedure, data format, and aerosol particle types is found in the following file: http://daac.ornl.gov/daacdata/safari2k/atmospheric/aerosol_properties/comp/aerosol_properties_readme.pdf.

• Images of major carbonaceous particle types in southern African biomass smoke and in the regional haze during SAFARI 2000, as identified using analytical TEM is found in the following file: http://daac.ornl.gov/daacdata/safari2k/atmospheric/aerosol_properties/comp/TEM_images_particle_types.pdf.

Document Information:

2004/6/16

Document Review Date:

2004/6/16

Document Curator:

webmaster@www.daac.ornl.gov

Document URL:

http://daac.ornl.gov