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SAFARI 2000 BVOC MEASUREMENTS AT SKUKUZA AND MAUN FLUX TOWERS, WET SEASON 2001
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Summary:

Biogenic volatile organic compound (BVOC) emissions were measured in a Colophospermum mopane woodland near Maun, Botswana, and in a Combretum-Acacia savanna in Kruger National Park, 13 km from Skukuza, Republic of South Africa (RSA) during the 2001 wet season campaign of SAFARI 2000. In addition, relaxed eddy accumulation (REA) measurements of BVOC fluxes (30 minute averages) were made on flux towers at these sites, where net CO2 emissions were also measured simultaneously. The investigators also took advantage of a wide variety of easily accessible plant specimens growing in a nursery in the Kruger National Park to screen an additional 95 species of African plants for their ability to emit isoprene, providing species level isoprene emission information which can be used to further initial estimates of isoprene emissions from additional ecosystems of southern Africa. A leaf cuvette technique was used to determine the emission capacities of the nursery plants and the temperature and light dependence of the emissions. This research on BVOC emissions contributes to attempts to develop a regional scale BVOC emissions model for southern Africa.

Data files contain records of BVOC measurements from the Maun and Skukuza flux tower sites; species level isoprene emissions and physiological data; and site meteorological data. The data files are stored as ASCII text files, in comma-delimited format, with column headers.

More information can be found in the companion file:
http://daac.ornl.gov/daacdata/safari2k/climate_meteorology/bvoc_flux/comp/bvoc_flux_readme.pdf

Data Citation:

Cite this data set as follows:

Guenther, A. B., P. Harley, J. P. Greenberg, and L. Otter. 2004. SAFARI 2000 BVOC Measurements at Skukuza and Maun Flux Towers, Wet Season 2001. 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/759.

References:

Greenberg, J. P., A. Guenther, P. Harley, L. Otter, E. M. Veenendaal, C. N. Hewitt, A. E. James, and S. M. Owen. 2003. Eddy flux and leaf-level measurements of biogenic VOC emissions from mopane woodland of Botswana, J. Geophys. Res., 108(D13): 8466, doi:10.1029/2002JD002317. Available for download (PDF).

Harley, P., L. Otter, A. Guenther, and J. Greenberg. 2003. Micrometeorological and leaf-level measurements of isoprene emissions from a southern African savanna. J. Geophys. Res., 108(D13), 8468, doi:10.1029/2002JD002592. Available for download (PDF).

Otter, L., A. Guenther, and J. Greenberg. 2002. Seasonal and spatial variations in biogenic hydrocarbon emissions from southern African savannas and woodlands. Atmos. Environ., 36: 4265-4275.

Scholes, R. J., et al. 2001. The environment and vegetation of the flux measurement site near Skukuza, Kruger National Park. Koedoe, 44: 73-83.

Data Format:

Data files contain records of BVOC measurements from the Maun and Skukuza flux tower sites; species level isoprene emissions and physiological data; and site meteorological data. The data files are stored as ASCII text files, in comma-delimited format, with column headers. A description of the data files is provided below:

maun_tower_terpene_flux.csv

Parameter Units
Day of year numeric
Time local time, decimal hour
a-pinene flux mg m-2 h-1

This file contains emissions data for a mopane woodland near Maun, Botswana for the period February 2-12, 2001.

skukuza_tower_temp_rad.csv

Parameter Units
Time of Day local time, decimal
Air Temperature degrees Celcius
Std. Error degrees Celcius
Incoming Shortwave W m-2
Std. Error W m-2

This file contains data on average meteorological conditions at the Skukuza tower site for the duration of the tower flux study. Data are hourly means (S.E.) for the period February 1-8, 2001.

skukuza_tower_isoprene.csv

Parameter Units
Time of Day local time, decimal
Wind Direction degrees, clockwise from N
Isoprene Flux mgC m-2 h-1
Isoprene Concentration ppbv

This file contains a summary of isoprene concentrations (ppbv) and fluxes (mgC/m2/h) measured at Skukuza tower site for the period February 1-8, 2001. Isoprene concentrations were measured at 19 meters.

skukuza_nrsry_isoprene_leaf.csv

Parameter Units
Plant Family family name
Species genus species
Leaf Area cm2
Leaf mass g dry weight
specific leaf mass g cm2
Photosynthesis µmol m-2 s-1
Stomatal Conductance mmol m-2 s-1
Internal CO2 concentration µmol/mol
Transpiration mmol m-2 s-1
Air Temperature deg C
Leaf Temperature deg C
Enclosure Flow rate ml min-1
Photosynthetically Active Radiation µmol m-2 s-1
Enclosure outlet isoprene concentration ppm
Isoprene emission rate µgC g h-1
Enclosure type text

This file contains a summary of species level isoprene emissions and physiological data for 95 species of African plants.

Additional information about the data format, methodology, and parameters measured is found in the companion file: http://daac.ornl.gov/daacdata/safari2k/climate_meteorology/bvoc_flux/comp/bvoc_flux_readme.pdf.

Document Information:

2004/9/8

Document Review Date:

2004/9/8

Document Curator:

webmaster@www.daac.ornl.gov

Document URL:

http://daac.ornl.gov