The ORNL DAAC and the LBA DIS announce the release of three data sets associated with the LBA-ECO component of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). The studies were conducted by the Nutrients Dynamics teams of ND-07 at studies sites near Brasilia, Brazil.
- LBA-ECO ND-07 Hydrochemistry of Natural and Developed Land Cover, Brasilia, Brazil. Data set prepared by J.S.O. Silva and M. Bustamante. This data set reports on dissolved nutrient concentrations, as well as dissolved oxygen, alkalinity, conductivity, turbidity, and pH measured in water samples collected from nine streams, surface runoff, wells, lysimeters, and precipitation sites located in the state of Brasilia, Brazil, between September 2004 and December 2006.
- LBA-ECO ND-07 Microbial Biomass in Cerrado Soils, Brasilia, Brazil. Data set prepared by L.T. Viana, M. Molina, M. Bustamante, A.S. Pinto, K. Kisselle, R. Zepp, and R. Burke. This data set reports the microbial biomass in soil samples collected from the Cerrado, a woodlands-savannah area, in Brasilia, from June 2000 to June 2001. The soil samples were from two areas, which had been subjected to two different fire regimes, and in a 20 year old active pasture. The analyses were conducted to determine the effects of fire regimes and changes in vegetation cover on the microbial communities of Cerrado soils.
- LBA-ECO ND-07 Trace Gas Fluxes Under Multiple Land Uses, Brazil: 1999-2004. Data set prepared by A.S. Pinto, K. Kisselle, M. Bustamante, R. Burke, M. Molina, and R. Zepp. This data set reports on soil-atmosphere fluxes of trace carbon dioxide, carbon monoxide, nitrous oxide, and nitric oxide under various natural and manipulated land use conditions. The studies were conducted near Brasilia, Brazil in pastures and agricultural areas under a variety of management regimes and in more natural areas of Cerrado (20-50% canopy cover) and campo sujo (open, grass-dominated), which were either burned every 2 years or protected from fire.
LBA is an international research initiative under the leadership of Brazil. The project focuses on the climatological, ecological, biogeochemical, and hydrological functions of Amazonia; the impact of land use change on these functions; and the interactions between Amazonia and the Earth system. The LBA-ECO component, which is funded by NASA, focuses on the question: "How do tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in Amazonia?"
See the LBA Project page for further information about the study and to access associated data and documentation maintained by the ORNL DAAC.
The ORNL DAAC is a NASA-funded data center archiving and distributing terrestrial ecology and biogeochemical dynamics data. The LBA Data and Information System (LBA-DIS) has been developed by INPE with NASA's participation.