Joint Commission on Oceanography and Marine Meteorology (JCOMM)

Lagrangian barometer drifter with drogue

In-situ oceanographic observations, encoded and transmitted using WMO communications systems, are used in weather prediction models, warnings of severe events, fisheries operations, monitoring of scientific experiments, ship routing, etc.  Broadcast of these data on the Global Telecommunications System (GTS) occurs within a period ranging from a few minutes to 30 days after the observation.  Most of the data are available within one or two days.

ISDM participates in the establishment and maintenance of code formats for the GTS.

ISDM activities in JCOMMsupport such programs as GTSPP, WOCE-UOT and SOOPIP for Temperature and Salinity ocean profiles and surface observations.  ISDM also acts as the responsible centre for drifting buoys (RNODC) and distributes JCOMMproducts such as the monthly Mean Sea Level in the Pacific analyses produced by the JCOMMSea Level Program (ISLP) to the Canadian marine community.

Advisory to users of ISDM real-time BATHY/TESAC data

SHIP49 Identifiers

Between the years 1995 to 2000, more than 20 thousand BATHY coded messages were received from Japanese sources with no valid call sign, and no time of day. A decision was made to keep these data despite the lack of a valid time, because of the volume of the data set. All of these stations were arbitrarily assigned a station time of 19:00, and also assigned the arbitrary call sign SHIP49 for easy identification.

SEAS data with wrong dates

Between the years 1994 to 2005, the U.S. VOS SEAS program generated a significant number of profiles with incorrect observation dates. There is no reliable way to distinguish these stations in ISDM archives. The U.S. NODC is currently working to revise the observation dates for the delayed mode version of these data.

Argo data as TESACs

The U.S. Argo program, from 1997 to February 22, 2001, transmitted TESAC messages with pressure values instead of depths. Users are advised that this may not be the sole source of this problem, and the GODAE server should be consulted for the delayed mode version where available.

Current activities

ISDM is a member of the International Oceanographic Data and Information Exchange (IODE) (External Site) whose mission is to enhance marine research, exploitation and development by facilitating the exchange of oceanographic data and information between participating Member States and by meeting the needs of users for data and information products.

Argo Website Thumbnail

Argo Section
A broad-scale global array of temperature / salinity profiling floats reporting in real-time is planned as a major component of the ocean observing system.