Argo profile pressure correction

This page is automatically created by code which scans all files in the Argo USGODAE 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	4521	411	1473	558	19	1173	343	131	273	161	119	9182
Any DM	3139	297	1028	421	-	835	219	96	149	114	-	6298
DM - missing P ADJ	-	-	-	-	-	-	34	5	-	17	-	56
RT - missing P ADJ	1111	111	58	-	-	4	72	80	1	2	31	1470
New format tech	4518	410	1473	556	19	1167	343	121	272	161	94	9134
SP offset deduced	4518	410	1473	556	19	1167	343	121	272	161	94	9134
P=Praw-SP	2343	365	754	538	-	984	334	110	238	144	90	5900
P type unknown	297	18	41	20	1	39	9	13	6	17	29	490
Pcor varies in prof	166	-	6	-	-	6	2	-	1	-	-	181
Some Praw-Padj	3572	387	1198	542	-	997	327	96	238	144	89	7590
Some valid SP	4349	393	1427	538	16	1129	332	118	267	144	89	8802
Some DAC vs Audit test	3570	387	1192	542	-	996	324	90	238	144	89	7572
Results of DAC vs Audit Pcor comparisons - Auto-correcting floats
All agree	1428	24	436	-	-	7	-	-	-	-	-	1895
All diffs < 1dbar	1	-	-	-	-	43	-	-	-	-	-	44
Some diffs > 1dbar	-	-	-	-	-	21	-	-	-	-	-	21
80% > 1dbar	-	-	-	-	-	-	-	-	-	-	-	-
Results of DAC vs Audit Pcor comparisons - Correction-required floats
Prof data but no SP	-	-	4	-	-	1	2	-	-	-	-	7
All agree	1576	290	381	445	-	801	145	44	134	53	35	3904
All diffs < 1dbar	487	68	329	77	-	93	88	39	83	54	20	1338
Some diffs > 1dbar	43	5	27	12	-	26	91	7	21	37	34	303
80% > 1dbar	-	-	4	-	-	1	56	2	8	15	1	87
Median Min Adjusted Profile Pressure
Med MPP < 2.5dbar	135	5	248	8	-	33	18	-	15	14	1	477
Med MPP < 7.5dbar	3224	292	848	510	-	890	242	73	220	50	88	6437
Med MPP < 12.5	145	7	48	19	-	71	65	23	2	52	-	432
Med MPP > 12.5	54	83	46	5	-	2	1	-	1	27	-	219

Table updated on 14-Mar-2013, GDAC state as at 9 March 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