The JPL CO2 Virtual Science Data Environment (VSDE) (http://co2.jpl.nasa.gov) is a comprehensive effort to bring together the models, data, and tools necessary for atmospheric CO2 research. The VSDE site is designed to provide streamlined Web-based discovery and access to multiple global and regional carbon dioxide data sets. Furthermore, this site provides tools for conversion, manipulation, and transformation of the data to facilitate research.
Many of the well-known data warehouses and archives host data services, but none offers unified access to all the data relevant to this specific science theme in a single location. Currently, users have to visit several data archives or distribution centers to find CO2 data products from diverse instrument campaigns. The VSDE collects data (or links to data) served at NASA Langley’s Atmospheric Science Data Center, the Goddard Earth Science Data and Information Services Center, and the TCCON Data Archive so users can search one site for the products they need, saving them time.
Additionally, the CO2 VSDE provides data subsetting and gridding services. Users can request only the data in the files that are of interest to them, and download a much smaller and manageable set of files to their local system. Users can utilize simple gridding algorithms (such as an average or standard deviation) through this site so they do not have to develop the code themselves. Other more complex algorithms such as “window averaging” and “Kriging” are available as well.
The VSDE could assist in data validation efforts. Since it offers data from multiple sources, users can easily compare and contrast CO2 data from different missions. For example, users could generate data files from different sources on the same grid, during the same time period, from the same data system (the VSDE), and see how the data compares.
This work was done by Brian W. Knosp, Luca Cinquini, Cameron E. Goodale, Hai M. Nguyen, James E. Hofman, Erin M. Murphy, and Bryan Duran of Caltech; and Andrew Hart for NASA’s Jet Propulsion Laboratory.