Argo profile pressure correction

This page is automatically created by code which scans all files in the Argo Coriolis GDAC.

Plots and listings analysing the pressure correction for floats of each DAC are accessed through the Plots Index Tables.

Summary stats of DAC vs Audit pressure correction differences

Pressure Correction (all floats)

	AOML	BODC	CORIOLIS	CSIRO	NMDIS	JMA	MEDS	CSIO	INCOIS	KMA	KORDI	Total all DACs
# floats	4750	430	1577	588	19	1229	367	138	300	168	119	9685
Any DM	3279	307	1084	459	-	839	227	96	177	127	-	6595
DM - missing P ADJ	-	-	-	-	-	-	6	5	-	1	-	12
RT - missing P ADJ	1106	106	90	-	-	4	72	87	-	2	31	1498
New format tech	4748	429	1577	587	19	1222	367	128	299	168	94	9638
SP offset deduced	4748	429	1577	587	19	1222	367	128	299	168	94	9638
P=Praw-SP	2457	383	813	561	-	1040	359	117	256	159	90	6235
P type unknown	309	18	53	27	1	39	8	13	15	9	29	521
Pcor varies in prof	214	-	8	-	-	6	14	-	1	-	-	243
Some valid SP	4567	412	1518	561	15	1185	357	125	285	159	89	9273
Some DAC vs Audit test	3694	405	1229	568	3	1018	355	90	256	159	87	7864
Results of DAC vs Audit Pcor comparisons - Auto-correcting floats
All agree	1479	24	458	-	3	14	-	-	-	-	-	1978
All diffs < 1dbar	1	-	-	-	-	36	-	-	-	-	-	37
Some diffs > 1dbar	-	-	-	-	-	21	-	-	-	-	-	21
80% > 1dbar	-	-	-	-	-	-	-	-	-	-	-	-
Results of DAC vs Audit Pcor comparisons - Correction-required floats
All agree	1805	326	461	493	-	860	176	71	189	57	38	4476
All diffs < 1dbar	330	51	260	51	-	57	78	15	58	65	17	982
Some diffs > 1dbar	40	4	29	13	-	25	101	4	9	37	32	294
80% > 1dbar	2	-	6	-	-	1	53	2	-	17	-	81
Median Min Adjusted Profile Pressure
Med MPP < 2.5dbar	178	5	274	8	3	36	38	-	32	14	1	589
Med MPP < 7.5dbar	3309	303	856	536	-	907	249	73	215	59	88	6595
Med MPP < 12.5	144	8	51	19	-	72	68	23	6	56	-	447
Med MPP > 12.5	52	89	46	5	-	3	1	-	3	29	-	228

Table updated on 01-Oct-2013, GDAC state as at 28-Sep-2013

Explanation of categories

All values are the number of floats exhibiting the described conditions for each DAC.

# floats	number of floats in total
Any DM	number of floats with any DM files
DM - missing P ADJ	floats with some DM files having empty or missing PRES_ADJUSTED (where there is a non-empty PRES profile)
RT - missing P ADJ	floats with some RT files having empty or missing PRES_ADJUSTED (where there is a non-empty PRES profile)
New format tech	tech file has new format
The following pressure correction aspects are deduced for each float based on the Surface Pressure Offset parameter name. These deductions are recorded in this table.
SP offset deduced	the Apex SP adjustment (ie 5 dbar, or 0 dbar) can be resolved (or guessed) from the surface pressure parameter name
P=Praw-SP	pressure does required correction by subtracting SP
P type unknown	don't know if is the above type of float
Pcor varies in prof	Praw-Padj is not constant through profile. This now excludes SOLOs where deepest ADJUSTED pressure is correct forincomplete bin averaging.
Some Praw-Padj	float does have some Praw and corresponding Padj values, so a "DAC correction" can be resolved.
Some valid SP	tech file has some plausible SP values (only required where pressure has to be corrected with SP)
Some DAC vs Audit test	some pressure correction comparisons can be made for these floats
All agree	all DAC corrections agree exactly with our estimates
All diffs < 1dbar	some discrepancy, but these are all < 1dbar
Some diffs > 1dbar	some discrepancies are large (> 1 dbar)
80% > 1dbar	80% of DAC corrections disagree with our estimatesby at least 1dbar
The minimum (ie near-surface) profile pressure value will normally be about 5 dbar for the Apex floats. We examine the median of these values for each float series, as another coarse guide to correct calibration.
Med MPP < 2.5dbar	(such cases often have MPP near zero - maybe self-calibrating pressure?)
Med MPP < 7.5dbar	2.5< MPP<7.5 - mostly close to 5 dbar
Med MPP < 12.5	7.5< MPP<12.5 - many of these are ~ 10dbar ??
Med MPP > 12.5	presumably some bad pressures