Donna J. Scott, Amanda Leon, Kara Gergely

1. American Geophysical Union Fall Meeting 2011, December 6, 2011 Authoritative Data Records: Implications Beyond the Science Donna J. Scott, Amanda Leon, Kara Gergely nsidc@nsidc.org NASA Earth Science Data Records NSIDC Data Management NOAA Climate Data Records A unified and coherent set of observations of a given parameter of the Earth system, which is optimized to meet specific requirements in addressing science questions. A time series of measurements of sufficient length, consistency, and continuity to determine climate variability and change (NRC, 2004) NSIDC has a role in the development of ESDRs and CDRs for both agencies, providing expert programming support, data management guidance and distribution through NSIDC’s data catalog. This presentation explores the challenges in serving similar data sets while maintaining unique agency requirements. MEaSUREs Project Requirements CDR Project Requirements • Guide PIs through MEaSUREs and CDR program requirements • Drive consistency between requirements where applicable • Provide technical expertise in data formats and production Development Facilitation Support Considerations • Delivered and distributed production code • Undefined Algorithm Theoretical Basis Document and • source code documentation • Data delivery through affiliated NASA DAACs and/or • MEaSUREs project sites • Report monthly metrics to MEaSUREs program leads • Supporting research and applications interests in Earth • science • CF compliant NetCDF4 • Delivered and distributed production code • Defined Algorithm Theoretical Basis Document, source • code documentation, production flowchart, defined • maturity matrix • Data delivery through NOAA NCDC* • Supporting science and decision makers in industry, • government and academia Rutgers NH snow product is input data to NSIDC’s NH weekly snow and sea ice data set and to the MEaSUREs blended terrestrial snow data set http://nsidc.org/data/nsidc- 0046.html (NSIDC data set) Production Understanding Goddard NASA TEAM sea ice distributed from NSIDC used in creation of NOAA/NSIDC sea ice CDR http://nsidc.org/data/nsidc-0051.html Sea ice motion, distributed from NSIDC, is input to sea ice age for the MEaSUREs snow and sea ice blended data set http://nsidc.org/data/nsidc-0116.html Goddard Bootstrap sea ice distributed from NSIDC used in creation of NOAA/NSIDC sea ice CDR http://nsidc.org/data/nsidc-0079.html Snow melt over sea ice, distributed from NSIDC, is input to the MEaSUREs snow and sea ice blended data set http://nsidc.org/data/nsidc-0105.html The NOAA/NSIDC sea ice CDR distributed from NSIDC* and NCDC will be input data for the MEaSUREs blended sea ice product http://nsidc.org/data/g02202.html Note: The NASA MEaSUREs snow team will also be contributing to the NOAA CDR program • Establish appropriate provenance practices for NSIDC distributed products • Understand product input dependencies across authoritative data records • Determine long-term production support needs for NSIDC distribution • Work with NASA and NOAA regarding ongoing data/production support NASAMEaSUREs Program http://earthdata.nasa.gov/our-community/community-data-system-programs/measures-projects http://nsidc.org/data/measures/ Data Citations (data sets above) Armstrong, R. L., and M. J. Brodzik. 2005. Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Fowler, C. 2003, updated 2008. Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Drobot, S. and M. Anderson. 2001. Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I Brightness Temperatures. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Please note: Future MEaSUREs data sets discussed in this presentation are part of the Northern Hemisphere Snow and Ice Climate Data Records. D. Robinson of Rutgers University is the PI. NOAA CDR Program http://www.ncdc.noaa.gov/cdr Data Citations (data sets above) Cavalieri, D., C. Parkinson, P. Gloersen, and H. J. Zwally. 1996, updated yearly. Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, [list dates used]. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Comiso, J. 1999, updated 2008. Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I, [list dates you used]. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. Meier, W., F. Fetterer, M. Savoie, S. Mallory, R. Duerr, and J. Stroeve. 2011. NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration,. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. • Provide additional guidance to users in choosing the right data set(s) • based on their needs • Consider changes in levels of service for data sets based on future • funding opportunities • Develop better discovery paths for all data sets • Ensure cross referencing of data sets within NSIDC web site, NASA • MEaSUREs, NOAA CDR and PI project sites