06AQ19960317 - salinity

Average of all cross-overs is: -3.1 ppm (but strongly influenced by 2 very low
cross-overs of cruises 90AV20041104 and 91AA19971204).
Inversion analysis suggests an insignificant adjustment.
Cross-overs with other core cruises (06AQ19920521, 316N19831007) do not warrant
an adjustment.
13 June 2008,
Mario Hoppema

Posted by Mario Hoppema on Fri Jun 13 12:15:08 +0200 2008 Edit

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06AQ19960317 - tco2

06AQ19960317 692
tco2
There are 3 xovers. The fitted offset is -4.2. The suggested adjustment is -4
All residuals are almost 0 and keep inside +-1.
Very good fit with 2 GLODAP cruises
Vigo 2008/06/10
Fiz Perez
Anton Velo
--
All xovers and output of inversions are refered on figure: "Report plot for
adjustments"
Real diff (Green dots) are the differences taken directly from xover routines.
The complete segment of error bar represents the xover standard deviation.
Yellow line stand for the offset calculated for this cruise.
Black stars stand for the offset calculated for the others cruises in the
xovers.
Blue squares stand for the Fitted differences that would be obtained from the
calculated offsets (Yellow line - black stars)
Red dots stand for the Residuals between the 'Real diff'(Green dots) and 'Fitted
diff' (Blue squares)
c suffix in the upper X axis labels stand for Core Cruises
expocode ids in upper X axis stand for NA ids or SO_ids+10000 for avoiding
coincidences

Posted by Anton Velo on Thu Jun 12 11:40:50 +0200 2008 Edit

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06AQ19960317 - nitrate

Average of all cross-overs is: 0.977
Inversion analysis suggests an adjustment of: 1.022
Almost all cruises appear to show that nitrate of 06AQ19960317 be somewhat low.
I suggest an adjustment of nitrate for cruise 06AQ19960317 of 1.02
6 June 2008,
Mario Hoppema

Posted by Mario Hoppema on Mon Jun 09 14:34:56 +0200 2008 Edit

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06AQ19960317 - phosphate

Average of all cross-overs is: 0.981 (but this value is strongly influenced by
an anomalous low cross-over with cruise 58A119890214).
Inversion analysis suggests an insignificant adjustment (0.983).
Based on this and the good agreement of phosphate of 06AQ19960317 with that of
core cruise 316N19831007 I suggest NO adjustment
9 June 2008,
Mario Hoppema

Posted by Mario Hoppema on Mon Jun 09 14:46:15 +0200 2008 Edit

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06AQ19960317 - silicate

Average of all cross-overs is: 0.952
Inversion analysis suggests an adjustment of: 1.015
However, silicate of cruise 06AQ19960317 appears to be low against almost all
other cruises with which it has cross-overs, including core cruises.
Inversion analysis by Steven van Heuven appears to confirm the cross-over
result.
At the Paris meeting we therefore suggest an adjustment of silicate for
06AQ19960317 of 1.05
25 June 2008,
Mario Hoppema

Posted by Mario Hoppema on Mon Jun 09 14:57:30 +0200 2008 Edit

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06AQ19960317 - oxygen

Average of all cross-overs is: 0.984
Inversion analysis suggests an adjustment of 1.030
The analysis is inconclusive. Many cruises appear to support an adjustment, but
some important ones not. As overall oxygen of cruise 06AQ19960317 appears to be
low (av. 0.984) indeed, I suggest a small adjustment.
Therefore, I suggest an adjustment of oxygen for cruise 06AQ19960317 of 1.02
11 June 2008,
Mario Hoppema
-
UPDATE
A new inversion analysis has been done (13 Oct. 2008), now with data to which
all suggested adjustments from the first round were applied. This new analysis
suggests an adjustment of 0.992
This indicates that the initial adjustment may have been too high. This is
further corroborated by cross-overs in the Indian sector. Note that the
cross-over results for this cruise are somewhat inconclusive indeed (see above).
Therefore I suggest to modify the adjustment of oxygen to 1.01
3 November 2008,
Mario Hoppema (after consultation with Claire Lo Monaco)

Posted by Mario Hoppema on Mon Jun 09 15:03:53 +0200 2008 Edit

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