The ICOADS website will be down starting Friday March 6th at 5:00pm MST for 24 hours for building maintenance.
ICOADS Web information page (Monday, 06-Feb-2012 12:34:18 MST):
NCEP Real-time (NRT) Marine Observations
Since ICOADS is now updated in near-real-time based on preliminary data, production of this dataset at ESRL was phased out effective in Mar. 2011 (thus data cover 1991-Feb. 2011).
NRT data (simple ascii format)
Monthly and weekly files of surface marine data gathered from the Global
Telecommunications System (GTS) by NOAA's National Centers for Environmental
Prediction (NCEP) become available at NCEP two days after the data month or
week. These are basic observational data (individual marine reports from
ships, buoys, etc.) in a simple ascii format containing selected weather
Data for the immediately preceding month and week are available via ftp from
NCEP (a file, updated daily with a 2-day data delay, is also available for users that need data for the current month before that month is complete). Monthly files
for January 1991-February 2011 are available from NOAA's
Earth System Research Laboratory (ESRL).
The data were also used at ESRL to construct ICOADS-like monthly summaries for 2° x 2° boxes.
format documentation, including alternative ftp instructions
Fortran read program
The data are largely unedited, although one major change in processing became
effective with March 1997 data, with transition of the input data to the BUFR
format (see format documentation for details).
Starting with NCEP's transition to the BUFR format in March 1997, and until this dataset was phased out, we monitored raw monthly numbers of reports through time, and their spatial distribution. The BUFR file type:
1 = ship
2 = drifting buoy
3 = moored buoy
4 = Coastal-Marine Automated Network (C-MAN)
forms the starting point for stratifying the data. However, the file type may
be unreliable, particularly for buoy data, so drifting and moored buoy reports
containing a 5-digit numeric ID (xxnxx) are subject to this added check on the
middle digit (possibly overriding the BUFR file type):
n: less than 5 indicates a moored buoy
n: greater than or equal to 5 indicates a drifting buoy
(These rules are still approximate. E.g., refer to the format documentation
for more details about some Western Pacific C-MAN stations with numeric IDs.)
Numbers of reports per month (March 1997-Feb. 2011) time-series plot
Global reports (latest available month) spatial distribution map
Directory of past maps (back to March 1997)
As part of their optimal interpolation analysis of sea surface temperature
(SST), NOAA (NCEP and the National Climatic Data Center) creates weekly maps
of report locations (with estimated ice cover). Note that these show only reports with SST and that
passed quality control and landmask checks (C-MAN data also are excluded).
[Data and Documentation][Documentation and Software]
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Updated: Feb 6, 2012 12:34:18 MST