CPTEC/INPE has made available in the Internet, in LBA-DIS, a large set of meteorological data from South America, for the period 2000 to 2004. The work, titled "Regional reanalysis of South America", was the result of a combination of daily forecasts of short period which were reprocessed, in high temporal and space resolution, and observations from actual data. One of the main objectives of this work was to supply the demand of countless research projects for meteorological data not always available for lack of a network of more complete observations covering the country and the South American continent.
For the creation of this group of data, or "re-analysis", the CPTEC's approach to the ETA regional model was used, with resolution of 40 square kilometers, with data generated every 6 hours and vertical profiles exceeding 25 kilometers of altitude and the system of assimilation of data PSAS (Physical-space Statistical Analysis System). The meteorological data can be accessed freely at the following site:
The database was developed with the specific objective of assisting researchers with projects in the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA), a commitment that CPTEC had established with LBA, it explains Dirceu L. Herdies, one of the responsible person for the work besides José A. Aravéquia, both of the Group of Assimilation of Data of CPTEC/INPE. The idea was to use what was of best in terms of numeric model and assimilation systems, together with all available data from conventional observation and satellite data.
The importance of this data becomes more evident for some areas, such as Bolivia, where a great shortage of systematic meteorological information exists. The work also counts with more reliable data obtained during the campaigns of SALLJEX (South American Low-level Jet Experiment), between 2002 and 2003, in areas of Argentina, Bolivia, Paraguay and Brazil and of LBA, in experiments in the state of Rondônia, between the months of September and November of 2002.
The data holdings contain almost 50 different variables, not counting sub-products that can be obtained starting from the generated group. In spite of providing data for the Amazonian, for researches of LBA, the work is also being consulted by researchers whose studies include other areas of the country and the continent. Researchers of the United States and Argentina, with researches related to South America, are also accessing the data. Studies that are benefiting include the hurricanes like Catarina, which occurred in 2004, in the south coast of the country, and on the Low Level Jets in Bolivia-Paraguay-Brazil-Argentina border.
The great need for this type of work is noticed by the great number of accesses in little more than two weeks of release of the data in LBA-DIS. In this same period, more than 60 DVDs were recorded, fulfilling users' requests that have difficulties in accessing the data through Internet. The next stage of the project will be the extension of the group of data for a period longer than 25 years, beginning the series in 1979 and ending in the current days. The forecast is that this material will be available to every scientific community of the country and abroad in 2008.