July 2007: ICOADS.RT observational data and monthly summaries made available for 2006-May 2007, and ICOADS.DM observational data and monthly summaries replaced for 1784-2005 to correct minor problems and attach supplemental data through 1997.
March-May 2006: ICOADS.RT observational data and monthly summaries made available for 2005 as an extension to the ICOADS.DM archive. Also, some updates and minor corrections were made to IMMA data for 1999-2004, limited to the ship metadata attachment. Figure 1 illustrates the platform type (PT) makeup of Release 2.3 for 1936-2005, and indicates the degree to which DM ship and other data have been included, versus real-time GTS data.
October-November 2005: ICOADS.DM observational data and monthly summaries made available for 1998-2004 to replace the 1998-2002 ICOADS.RT products. Thus for this release, products for 1784-2004 were entirely ICOADS.DM based. Specifically, this included replacement of some Ocean Data Acquisition System (ODAS) data received via the Global Telecommunication System (GTS) with these DM sources:
November 2003: Real-time (ICOADS.RT) observational data and monthly summaries made available for 1998-2002 as an extension to the ICOADS.DM archive, plus the ICOADS.RT observations were offered in a new ascii IMMA format.
September 2002: Began website transition from the earlier Release terminology and, by international agreement, to the name ICOADS. The delayed-mode (ICOADS.DM) archive encompasses the data and monthly summary products referred to below as from three separate COADS updates: Releases 1a (1980-97), 1b (1950-79), and 1c (1784-1949).
August 2001: Report rejection (ZQ) problem corrected (description), including revised 2°x2° summaries back to 1800.
March 2001: Initial 2°x2° summaries completed (available back to 1800).
February 2001: Final LMRF completed.
November 2000: Preliminary ("beta") individual observations (LMRF) completed.
January 1999: For October-November 1970, 505 mislocated reports (LMRF) were deleted from deck 555 (Monterey Telecom.); 2°x2° and 1°x1° summaries in MSG format were updated in June 1999.
November 1996: 2°x2° summaries for 1950-79 completed.
October 1996: 1950-1959 individual observations completed (also, individual observations for the additional period 1946-49 were completed in October 1997 for the NCEP/NCAR Reanalysis Project).
July 1996: 1960-1969 LMRF completed.
January 1996: 1970-1979 individual observations (LMRF) completed.
June 1999: 1980-97 update and extension completed, including an update of the previously available 1980-95 data (a preliminary version of the data for this period was completed in March 1999).
March 1997: 1990-95 extension completed, including an update of the previously available 1990-93 data.
June 1995: 1992-93 extension completed, including an update of the previously available 1988 and 1992 data to correct dew point and wet bulb temperature errors in US-keyed data. For more information see Moisture Variable Corrections for 1988 and 1992-1993.
July 1993: Data completed for 1980-92 (original version of Release 1a), introducing the LMRF format to replace the CMR observational format.
June 1999: The 1°x1° summaries were revised to include updated Release 1a data for 1980-97. In addition, 2°x2° summaries in the MSG format were made available for 1950-97 based on the latest Release 1b and 1a data.
November 1997: The 1°x1° summaries were revised and extended to include the latest Release 1a data available for 1990-95.
November 1996: A new set of 1° latitude x 1° longitude monthly summary statistics for an expanded set of 22 variables became available for 1960-93 (see PACS examples).