22 July 92 PROBLEMS TO NOTE: The data selection for Barrow is not consistent for the data set. Data starting in 1981 has been given a more rigourous selection than prior to this date, i.e., there are no D or A selection flags before 1981. The data for Samoa from 1976 through 1987 have had an additional selection based on wind direction and wind speed. (See Waterman et al., 1989). A 'WD' code stands for data that has been flagged because the wind direction was not from the clean air sector. A 'WS' speed is for data where the wind speed is below a minimum value. There are no 'A' flags in the data for this time period. ================================================================ 22 July 1992 The types of flags used are currently under review. Many flags that were seldom used or were redundant in thier meaning will be replaced with more common flags. The goal is to eventually have only 8 base flags total; ' ', C, I, V, D, A, DN, and NC. Any additional flags based on specific selection schemes for each site will be noted in this file. ================================================================ 22 July 1992 Preliminary data from Barrow for 1991 is now available. Changes to this data based on recalibration of reference gases will occur in the future. ================================================================ 27 July 1992 Corrections to the Samoa data from January 1, 1988 to August 31, 1991 were made due to better determinations of the reference gases used during this period. Files affected were smo88, smo89, smo90, smoday88, smoday89, smoday90, smomm. The data for 1991 were added to the archive. The new files are smo91 and smoday91. Data starting on September 1, 1991 are still subject to revision. ================================================================ 27 July 1992 Preliminary data from Mauna Loa for 1991 is now available. Changes to this data based on recalibration of reference gases will occur in the future. ================================================================ 28 July 1992 Compressed tar files are now available for transfer. There are four files, one for each observatory. Each tar file contains all the files in the directory for that station, and is named sta.in-situ.tar.Z where sta is the three letter station code, 'brw', 'mlo', 'smo', or 'spo'. ================================================================= 12 August 1992 Minor corrections to Samoa and Barrow data were made. Samoa: 77-04-09 hour 00 CO2 changed from 300.45 to 999.99 77-04-09 hour 00 Flag changed from SI to I 81-11-20 hour 00 CO2 changed from 861.97 to 999.99 81-11-20 hour 01 CO2 changed from 861.97 to 999.99 82-01-07 hour 19 CO2 changed from 902.43 to 999.99 82-01-07 hour 20 CO2 changed from 902.43 to 999.99 82-01-07 hour 21 CO2 changed from 902.43 to 999.99 82-01-07 hour 22 CO2 changed from 902.43 to 999.99 82-01-07 hour 23 CO2 changed from 902.43 to 999.99 82-01-08 hour 00 CO2 changed from 340.46 to 999.99 82-01-08 hour 01 CO2 changed from 340.11 to 999.99 Barrow: 82-06-20 hour 09 CO2 changed from 99.99 to 999.99 ================================================================= 18 May 1994 Added data for Barrow, 1992. Added data for Mauna Loa, 1992. Added data for Samoa, 1992. Added data for South Pole, 1991. Added data for South Pole, 1992. Changes to this data based on recalibration of reference gases will occur in the future. Updated tar.Z files to include new data. =================================================================== 04 October 1996 Changed the archive for the Mauna Loa data. The formats of the Mauna Loa files are different from the other sites. See the README for details. Added Mauna Loa data for 1993, 1994, and 1995. Updated tar.Z files to include new data. =================================================================== 04 March 1996 Changed the archive for all sites. The formats of the files are different from before. See the README for details. Added data for 1993, 1994, and 1995. Updated tar.Z files to include new data. =================================================================== 29 Nov 1999 Added data through 1998 for all sites. Updated tar.Z files to include new data. =================================================================== 05 Oct 2000 Added data through 1999 for all sites. Updated tar.Z files to include new data. =================================================================== 10 Sep 2001 Added year 2000 data for Mauna Loa. Updated mlo.in-situ.tar.Z files to include new data. =================================================================== 01 Oct 2002 Added year 2000 data for Barrow, Samoa and South Pole. Added year 2001 data for all sites. Updated tar.Z files to include new data. =================================================================== 27 Nov 2002 Revised Maunal Loa 2001 data. There was a mistake in the November 2001 data values, resulting in them being ~0.5 ppm to low. =================================================================== 13 Mar 2003 The hourly average files now have a new format, which includes the standard deviation of the hourly average. See the README for details. Individual text files also now have a .co2 extension on the file name. =================================================================== 28 Nov 2003 Added year 2002 data for all sites. Updated tar.gz files to include new data.