GLOBALVIEW-CO2, 2012

1. Release Date: 3 January 2013
2. Important changes to GLOBALVIEW-CO2
   The content, packaging, and distribution of GLOBALVIEW-CO2 have changed. These changes are driven by current needs of our data providers and product users and will likely require you to make some code changes. We apologize in advance for any inconvenience and ask for your patience during this transition.

   Content:

   The GLOBALVIEW-CO2 data product now includes one file per data record. Each file includes the extended record, suggested relative weights, the reference marine boundary layer timeseries at the latitude of the sampling location, and considerably more metadata than in previous updates. The Reference Marine Boundary Layer matrix, which was provided in previous releases, is no longer available. Instead, NOAA has made a more comprehensive MBL reference product available here. Statistical summaries of key features in measurement records are no longer included.

   Packaging:

   The product is now distributed using the Observation Package (ObsPack) framework. The ObsPack framework supports both ASCII text and netCDF4 file formats. The ASCII text files have similar content to previous extended record (ext) files. The netCDF files have the same content as text files but also include additional date/time representations. The extended record file names have changed from previous updates. Please visit the ObsPack web site for additional information.

   Distribution:

   GLOBALVIEW-CO2, 2012 data product is available for download from the ObsPack web site. The product may be downloaded as a single package only. At this time, citation of the GLOBALVIEW-CO2 data product is unchanged from previous years. Please see Citation for details.
3. Data additions
   Discrete surface measurements:

   • FIK Finokalia, Crete, Greece (LSCE)
   • LPO Ile Grande, France (LSCE)
   Continuous surface or single-level tower measurements:

   • BRADTA Afternoon average values from Bratt, Canada (EC)
   • ESTDTA Afternoon average values from Esther, Alberta, Canada (EC)
   • HEIDTA Afternoon average values from Heidelberg, Germany operated by the University of Heidelberg, Institut fuer Umweltphysik (UHEI-IUP)
   • JFJNTA Nighttime average values from Jungfraujoch, Switzerland operated by the University of Bern (KUP)
   • LUTDTA Afternoon average values from Lutjewad, the Netherlands operated by the University of Groningen, Centre for Isotope Research (RUG)
   • RBADTA Afternoon average values from Roof Butte, Arizona, United States (NCAR)
   • RBANTA Nighttime average values from Roof Butte, Arizona, United States (NCAR)
   • SGPDTA Afternoon average values from Southern Great Plains, Oklahoma, United States operated by Lawrence Berkeley National Laboratory (LBNL)
   • TRN180 Afternoon average values from Trainou, France (intake height: 180 magl) (LSCE)
4. Site Classification Change
   All surface in situ records now include in the GLOBALVIEW file name either a 1) DTA tag or a NTA tag if daily values are derived from either daytime (afternoon) measurements or nighttime measurements. If neither tag is included then all available baseline measurements are used to derive daily values. As an exception, all multi-level tower sites (e.g., LEF, BAO, HUN) use afternoon hours to derive the daily value but DO NOT include DTA in the GLOBALVIEW file name. In these cases, the sample intake height (in magl) is included in the file name.
5. Site Code Change
   The 3-letter site identification code for Darwin (Charles Point)/Jabirus, Northern Territory, Australia (DAA) operated by CSIRO was changed to CPA to be consistent with the WMO GAWSIS. The 3-letter site identification code for flight data between Tokyo and Syndey (WPO) operated jointly by NIES and MRI as part of the CONTRAIL project was changed to CON.