Post on 13-Jun-2020
WOD and GTSPP: same system architecture
GTSPP ocean profile data (non-
fixed platform) 1990-2015
4 million casts
WOD ocean profile data (non-
fixed platform) 1990-2015
6.6 million casts
GTSPP Fixed Platform
(Equatorial Moorings +
Coastal Stations) 1990-2015
17 million casts
WOD ocean profile data (non-fixed platform) 1772-1989
6.5 million casts
WOD Fixed Platform 1984-2015
1.5 million casts
GTSPP and the World Ocean Database (WOD) – overlap, but very different data sets
Similar, but different roles
• GTSPP is the repository for quality controlled near-real time ocean profile data from the GTS and delayed-mode updates from participants. The main use today is near-real time data delivery to users.
• WOD is the repository for all sources of ocean profile data, historic and recent. The main use is for long-term climate studies.
GTSPP WOD Quarterly Updates: XBT, CTD, glider, XCTD, pinniped
GTS feed from MEDS: Argo,
moored buoys, pinniped, glider, XBT, CTD, XCTD
Delayed Mode: CSIRO (BOM/RAN), SIO
Delayed Mode: CSIRO (BOM/RAN), SIO, CCHDO, ICES, JODC, MEDS, etc.
Argo from GDAC
(near-real time _
delayed) Moored
buoy PMEL
Reason: WOD does not carry some of the metadata required by GTSPP History records with qc software used and
conversion routine used. History records with original values which
have been altered Originator database identifier Other (SEAS identifier, SOOP line, etc.)
Data are not presently passed from WOD to GTSPP Some original data are uploaded to both WOD and GTSPP
Benefits of WOD and GTSPP sharing same system architecture
1. NCEI needs to maintain only one system 2. Easier transfer/sharing of data between data sets 3. Combined data delivery through the CMD
Obstacles WOD and GTSPP sharing same system architecture
1. Speed: the present WOD system is the basis for the World Ocean Atlas and other scientific research including ocean heat content. For basic processing and scientific work the new system must be at least as fast as the existing system
2. Long-term maintenance and alterations: Can we maintain an flexible dual use system for GTSPP and WOD with their disparate demands.
WOD and GTSPP: Joined at a higher level
(Geoportal/THREDDS)
8
World Ocean Database Additional QC
Uniform format
NODC to Public Information Stream (Profile Data)
NODC Permanent
Archive
Public Access G
eoportal/THRED
DS
WODselect
9
Ideal NODC to Public Information Stream (Profile Data)
NODC Permanent
Archive
Public Access G
eoportal/THRED
DS
WOD
GTSPP
Argo
PMEL buoys
10
Ideal NODC to Public Information Stream (in situ Data)
NODC Permanent
Archive
Public Access G
eoportal/THRED
DS
Coastal Buoy
Profile
Current
Thermo salinograph
Consolidated Granule Level GeoPortal
Best Copy
World Ocean Database
GTSPP
Argo
Individual Accessions
Get Data Information
Get Data
Get Data
Get Data
Information
Information
Information
See all Information
Best Copy: Get Data
•Virtual download through THREDDS Server
•tar ball of all data files
•CF compliant netCDF format
•Files are not uniform in format
•Quality control not uniform in execution or as represented by flags
Best Copy Information Description of data which matches request X casts from GTSPP (ocean profile data from 1990 to present Y casts from World Ocean Database (historical ocean profile data from 1772-[WOD most current date] : takes precedence over GTSPP Z cycles from Argo (takes precedence over all others for profiling floats) A daily means from PMEL/NDBC tropical moored buoy arrays (takes precedence over all others for tropical moored buoys) B cruise thermosalinograph records C coastal moored buoy stations
Progress towards goal
WOD and GTSPP are both available on NCEI THREDDS server WOD and GTSPP are both in CF compliant netCDF WOD and GTSPP have supplied single cast ISO metadata to Geoportal Everything is in place Holdup: Cannot test – NCEI has had delays in installing latest versions of THREDDS server, ERDDAP, elastic search, etc. Future: Looks good, but absolutely no way to tell until we test Addition of Argo data stream, ICOADS data stream underway
Advantages to being part of the MCDS
Codify data flow which is somewhat ad hoc now Make it easier for originators to see where to send data Give official imprimatur to our activites
Obstacles to being part of the MCDS
Apathy on the part of IODE (hopefully to be discussed at IODE 23 Turnover at WMO Disagreement WMO/IODE as to some terms/definitions in MCDS ICOADS agreement from their community
WOD proposal will be submitted for approval to JCOMM for next meeting (Oct. 2017)