New Table D sequence for reporting observations from ocean gliders

[david-i-berry]

Authors

• Justin Buck (British Oceanographic Data Centre (BODC)) on behalf of OGDMTT
• Kevin O'Brien (NOAA Pacific Marine Environmental Laboratory (PMEL)) on behalf of OGDMTT
• Dan Hayes (University of Cyprus) on behald of OGDMTT
• David Berry (National Oceanography Centre (NOC)) as JCOMM TDC coordinator
• plus additional contributors in this thread

Summary and purpose

The Ocean Gliders Data Management Task Team (OGDMTT) proposes a new BUFR sequence to report the full suite of glider observations along a trajectory profile.

Action proposed

The team is kindly asked to review and approve the contents for inclusion within the next update to the WMO Manual on Codes.

Discussions

Ocean glider data is currently submitted to the GTS using the Argo BUFR sequence (3-15-003) but this is not ideal. For example, the Argo sequence does not allow the along track positions to be reported as part of the trajectory profile and a number of parameters are missing. This new sequence seeks to address those deficiencies.

Detailed proposal (updated 10/01/2023)

New Table B Entries

Class 42: BUFR / CREX Oceanographic Elements

Descriptor	Name	Units	Scale	Reference	Width	Notes	CREX scale	CREX width
0-42-016	Sea water potential density referenced to sea surface	kg m-3	5	-10000000	24

New Table D Entries

Category 15: Oceanographic report sequences
new sequence for Ocean glider trajectory profile

Table Reference	Table References	Element Name	Description
	3-15-012	Sequence for reporting observations from a single glider trajectory profile
	3-01-150	(WIGOS identifier)
	2-01-129	Change data width	Increase width of following elements by 1 bit
	0-01-087	WMO marine observing platform extended identifier
	2-01-000	Change data width	Cancel increase in width
	0-01-019	Long station or site name
	0-01-036	Agency in charge of operating the observing platform
	0-02-148	Data collection and/or location system
	0-01-085	Observing platform manufacturer's model
	0-01-086	Observing platform manufacturer's serial number
	0-08-021	Time significance	Set to 25, nominal reporting time
	3-01-011	(Year, month, day)
	3-01-013	(Hour, minute, second)
	3-01-021	(Latitude / longitude (high accuracy))
	0-11-104	True heading of aircraft, ship or other mobile platform
	0-02-169	Anemometer type	Set to 2, wind observation through ambient noise (WOTAN)
	0-11-002	Wind speed
	0-11-001	Wind direction
	0-02-169	Anemometer type	Set to missing / cancel previous value
	0-22-032	Speed of sea surface current
	0-22-005	Direction of sea-surface current
	3-01-011	(Year, month, day)
	3-01-013	(Hour, minute, second)
	0-08-021	Time significance	Set to 2, time averaged
	0-04-025	Time period or displacement	Duration of dive
	3-01-021	(Latitude / longitude (high accuracy))
	0-22-031	Speed of current
	0-22-004	Direction of current
	0-08-021	Time significance	Set to missing / cancel previous value
	0-05-068	Profile number
	0-01-079	Unique identifier for profile
	1-26-000	Delayed replication of 26 descriptors
	0-31-001	Delayed descriptor replication factor	Number of profile sections (e.g. descending, horizontal, ascending)
	0-22-056	Direction of profile	0 (ascending / upwards profile), 1 (descending / downwards profile), or 2 (horizontal)
	1-23-000	Delayed replication of 23 descriptors
	0-31-002	Extended delayed descriptor replication factor
	3-01-011	Year, month, day
	3-01-013	Hour, minute, second
	3-01-021	Latitude / Longitude (high accuracy)
	0-08-080	Qualifier for GTSPP quality flag	20, position
	0-33-050	Global GTSPP quality flag
	0-07-062	Depth below water surface
	0-08-080	Qualifier for GTSPP quality flag	13, water depth at a level
	0-33-050	Global GTSPP quality flag
	0-22-065	Water pressure
	0-08-080	Qualifier for GTSPP quality flag	10, water pressure at a level
	0-33-050	Global GTSPP quality flag
	0-22-045	Sea/water temperature
	0-08-080	Qualifier for GTSPP quality flag	11, water temperature at a level
	0-33-050	Global GTSPP quality flag
	0-22-066	Water conductivity
	0-08-080	Qualifier for GTSPP quality flag	25, water conductivity at a level
	0-33-050	Global GTSPP quality flag
	0-22-064	Salinity
	0-08-080	Qualifier for GTSPP quality flag	12, salinity at a level
	0-33-050	Global GTSPP quality flag
	0-42-016	Sea water potential density referenced to sea surface
	0-08-080	Qualifier for GTSPP quality flag	26, sea water potential density at a level
	0-33-050	Global GTSPP quality flag

Additions to code tables

0-08-080
Qualifier for GTSPP quality flag

Code figure	Meaning
0	Total water pressure profile
1	Total water temperature profile
2	Total water salinity profile
3	Total water conductivity profile
4	Total water depth
5–9	Reserved
10	Water pressure at a level
11	Water temperature at a level
12	Salinity at a level
13	Water depth at a level
14	Sea/water current speed at a level
15	Sea/water current direction at a level
16	Dissolved oxygen at a level
17–19	Reserved
20	Position
* 25	Water conductivity at a level
* 26	Sea water potential density referenced to sea surface at a level
32-62	Reserved
63	Missing value

New entries (25 - 31) indicated by *.

See also wmo-im/CCT#122.

Test data

test-data.zip

[jbathegit]

I spotted a couple of typos - the FXY value for "Direction of sea-surface current" should be 0-22-005 (not 0-02-169), and the FXY value for "Speed of sea-surface current" should be 0-22-032 (not 0-22-031).

[david-i-berry]

Thanks, it's hopefully correct now.

[chenxiaoxia2019]

@DavidBerryNOC I have created a branch for this issue. Could you please check it? BTW, when it comes to adding table B entries/class 41/42, please provide the information of CREX unit/scale/width. Many thanks.