Cruise: 35MF20010103 (dataset:CARINA) Data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Synonyms (including errata!) for this cruise: OISO-6; 35MF20010103; OISO-6;
IMPORTANT information for GLODAP Reference Group Editors: This adjustment is a published version for GLODAPv2!
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manualXovers.png | [autogenerated from manual_xovers/adjustments!] |
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View 1 ReadMe(s) (Lists all ReadMes)
35MF20010103 - 2008-06-17 14:28:38 - version: 0Posted on 2008-06-17 14:28:38 - last updated on 2008-06-17 14:28:38 as version number 0
5/3/07 Initialized README file
Data from C. Lo Monaco 1/15/07
Ship and cruise designation: Marion Dufresne; 35M20010101, OISO-06
Cruise dates: 1/3-1/26/2001
EXPOCODE: 35M20010101
11 stations
Chief Scientist: N. Metzl
Hydro: Who - ; Status - final; S Plus - up to date
Notes: only enough salinity to calibrate CTD
Nuts/O2: Who - ; Status - final; S Plus - up to date
Notes: No phosphate
TCO2: Who - C.LoMonaco; Status - final; S Plus - up to date
Notes: CRM?
TA: Who - C.LoMonaco; Status - final; S Plus - up to date
Notes: CRM?
fCO2: Who - ; Status - not measured; S Plus -
Notes: Underway only
pH25: Who - ; Status - not measured; S Plus -
Notes:
CFC: Who - ; Status - not measured; S Plus -
Notes:
C-14: Who - ; Status - not measured; S Plus -
Notes:
C-13: Who - ; Status - unknown; S Plus -
Notes: no data in file
H-3/He-3: Who - ; Status - ; S Plus -
Notes:
Other: O18 - no data in file
ChloroA
View comment(s) (filtered by salinity in subject)
Autogenerated CTD salinity and CTD oxygen update
Automated update! This overwrites adjustment values (and flags) of CTDoxy and
CTDsal with the values from BOTsal and BOToxy for every cruise, unless CTDsal
(or CTDoxy) is not present or bad.
Salinity action ID:6; CTD salinity data good, setting CTD salinity offset and QC
flag to bottle values.
Oxygen action ID:5; CTD oxygen data good, setting CTD oxygen offset and QC flag
to bottle values.
Posted by svheuven@gmail.com on 2015-02-19 09:22:19 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/salinity: update slope+intercept
autogenerated: BOTsal is compatible with CALIBRATED CTDsal
Posted by svheuven@gmail.com on 2014-12-18 16:52:45 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - salinity
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : make -0.005. Inversion
result is clear
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/salinity: init slope+intercept
autogenerated: using mean of BOTsal and UNCHANGED CTDsal
Posted by svheuven@gmail.com on 2014-02-25 17:02:15 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - salinity
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
11 cross overs were analyzed. The average of all cross overs is +6.1 (+/-9.0)
ppm.
9 cross overs show significant differences (>5 ppm) and involve cruises that are
thought to have no significant offset in salinity. When the offsets suggested
for the other cruises are taken into account the average of all cross overs is
+7.6 (+/-2.5) ppm. It should be noted, however, that lower offsets are found at
56°S (mean of +6 +/-1 ppm) compared to 30°S (mean of +10 +/-1 ppm).
OTHER CROSS OVERS:
The cross overs with cruises INDIGO1 (30°S) and INDIGO3 (56°S) show offsets of
+10 (+/-9) ppm and +3 (+/-3) ppm, respectively, which supports the analysis
above.
CONCLUSION:
Different results are obtained north or south of the Polar Front which should be
attributed to natural variability that is more likely to happen in Antarctic
deep waters than in Subtropical deep waters.
Based on this I suggest an adjustment of -10 ppm for salinity.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-08 23:53:01 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by ctd_salinity in subject)
Autogenerated CTD salinity and CTD oxygen update
Automated update! This overwrites adjustment values (and flags) of CTDoxy and
CTDsal with the values from BOTsal and BOToxy for every cruise, unless CTDsal
(or CTDoxy) is not present or bad.
Salinity action ID:6; CTD salinity data good, setting CTD salinity offset and QC
flag to bottle values.
Oxygen action ID:5; CTD oxygen data good, setting CTD oxygen offset and QC flag
to bottle values.
Posted by svheuven@gmail.com on 2015-02-19 09:22:19 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by tco2 in subject)
Autogenerated comment - tCO2
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - tco2
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
11 cross overs were analyzed. The average of all cross overs is +1.4 (+/-3.9)
umol/kg.
7 cross overs show no significant differences (<4 umol/kg) and involve cruises
that are thought to have no offset in TCO2. When the offsets suggested for the
other cruises are taken into account the average of all cross overs is +0.3
(+/-3.1) umol/kg. This suggests that no adjustment would be required.
It should be noted, however, that larger offsets are found at 30°S (+2.9 +/-1.3
umol/kg), compared to 56°S (-1.8 +/-2.3 umol/kg). This difference could be
attributed to natural variability as suggested by the analysis of salinity data.
OTHER CROSS OVERS:
The cross overs with cruises INDIGO1 (30°S) and INDIGO3 (56°S) show offsets of
-8.4 (+/-4.6) umol/kg and -5.1 (+/-2.0) umol/kg, respectively. But since the
cruises INDIGO1 and INDIGO3 are known to have high TCO2 values by about 10
umol/kg and 6 umol/kg respectively (according to this study and GLODAP), the
differences translate into no significant offsets. This supports no adjustment.
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for TCO2.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-08 23:53:35 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by alkalinity in subject)
Autogenerated comment - alkalinity
Automated update setting data quality flag from BAD to GOOD in order to retain
these non-QCed data in final product. SvH/GLODAPv2 / 2015-01-19)
Posted by svheuven@gmail.com on 2015-01-20 14:46:42 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - alkalinity
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : set to -888
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - alkalinity
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
9 cross overs were analyzed. The average of all cross overs is -2.0 (+/-3.7)
umol/kg.
All cross overs but 2 show no significant differences (<5 umol/kg) and involve
cruises that are thought to have no offset in alkalinity. This suggests that no
adjustment would be required.
Note that cross overs found at 56°S show a large scatter around the mean (-3.0
+/-2.8 umol/kg), probably due to natural variability. And indeed, if a decrease
in alkalinity of 1 umol/kg/yr is assumed (as suggested in this study) the
scatter is reduced (-2.8 +/-1.2 umol/kg).
OTHER CROSS OVERS:
The cross overs with cruises INDIGO1 (30°S) and INDIGO3 (56°S) show differences
of -17.0 (+/-1.3) umol/kg and -14.7 (+/-3.0) umol/kg, respectively, but INDIGO1
is known to have high alkalinity values by about 16 umol/kg and INDIGO3 would
have no offset but alkalinity might have decreased by about 14 umol/kg. If this
is taken into account the offsets with INDIGO cruises translate into no
significant differences, which supports the analysis above.
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for alkalinity.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-08 23:53:55 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by ph in subject)
Autogenerated comment - phosphate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by nitrate in subject)
Autogenerated comment - nitrate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : set to 1
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - nitrate
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
10 cross overs were analyzed. The average of all cross overs is 0.994 (+/-0.52).
4 cross overs show no significant differences (<2%), and 3 of them involve
cruises that are thought to have no offset in nitrate. When the suggested
offsets for the other cruises are taken into account as well as the suggested
natural variability at 56°S, the average of all cross overs is 1.004 (+/-0.005).
This suggests that no adjustment would be required.
OTHER CROSS OVERS:
The cross over with the cruise INDIGO1 (30°S) shows a ratio of 1.015 (+/-0.009)
and since INDIGO1 is thought to have no offset in nitrate, this supports the
result of the analysis above.
The cross over with the cruise INDIGO3 (56°S) shows a ratio of 1.049 (+/-0.013),
but INDIGO3 is thought to have low nitrate values. When the suggested offset is
taken into account as well as the suggested natural variability, a good
agreement is found with the analysis above (1.013).
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for nitrate.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-21 13:22:47 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by phosphate in subject)
Autogenerated comment - phosphate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by silicate in subject)
Autogenerated comment - silicate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain. I cannot solve
these 35MF cruises for Silicate, and by this stage will happily just accept
anything Clair suggested for them.
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - silicate
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
11 cross overs were analyzed. The average of all cross overs is 1.025
(+/-0.046).
Only 2 cross overs found at 30°S show no significant differences (<2%) but they
involve cruises that are thought to have high silicate. When the suggested
offsets are taken into account the average of the 5 cross overs found at 30°S is
1.024 (+/-0.007). This suggests that a small adjustment could be required
(0.98).
At 56°S, however, when the suggested offsets as well as the suggested natural
variability are taken into account the average of the 6 cross overs is 1.001
(+/-0.003). This suggests that no adjustment would be required, but it is not
warranted since Antarctic deep waters are entitled to natural variability which
could mask the offset observed at 30°S.
OTHER CROSS OVERS:
The cross over with the cruise INDIGO1 (30°S) shows a ratio of 1.031 (+/-0.019),
which is in good agreement with the analysis above (given that INDIGO1 is
thought to have slightly low silicate).
The cross over with the cruise INDIGO3 (56°S) shows a ratio of 0.938 (+/-0.007),
but INDIGO3 is thought to have high silicate values. When the suggested offset
is taken into account as well as the suggested natural variability, a good
agreement is found with the OISO analysis above (1.008).
CONCLUSION:
The different results obtained at 30°S and 56°S are probably due to natural
changes that would have operate in Antarctic deep waters as suggested by the
analysis of other parameters including salinity.
Based on this I suggest an adjustment of 0.98 for silicate.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-21 13:23:29 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by oxygen in subject)
Autogenerated CTD salinity and CTD oxygen update
Automated update! This overwrites adjustment values (and flags) of CTDoxy and
CTDsal with the values from BOTsal and BOToxy for every cruise, unless CTDsal
(or CTDoxy) is not present or bad.
Salinity action ID:6; CTD salinity data good, setting CTD salinity offset and QC
flag to bottle values.
Oxygen action ID:5; CTD oxygen data good, setting CTD oxygen offset and QC flag
to bottle values.
Posted by svheuven@gmail.com on 2015-02-19 09:22:19 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/oxygen: update slope+intercept
autogenerated: BOToxy is compatible with unchanged CTDoxy
Posted by svheuven@gmail.com on 2014-12-18 16:52:45 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - oxygen
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/oxygen: init slope+intercept
autogenerated: using BOToxy because bad fit of CTDoxy.
Posted by svheuven@gmail.com on 2014-02-25 17:02:15 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - oxygen
OISO6: only one deep profiles (at 56°S).
INTERNAL OISO CONSISTENCY:
6 cross overs were analyzed. The average of all cross overs is 1.007 (+/-0.029).
3 cross overs show no significant differences (<1%) and involve cruises that are
thought to have no offset in oxygen. When the offsets suggested for the other
cruises are taken into account the average of all cross overs is 0.996
(+/-0.004). This suggests that no adjustment would be required.
OTHER CROSS OVERS:
The cross over with the cruise INDIGO3 shows a ratio of 1.006 (+/-0.006), which
supports the analysis above.
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for oxygen.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-21 13:23:48 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View comment(s) (filtered by ctd_oxygen in subject)
Autogenerated CTD salinity and CTD oxygen update
Automated update! This overwrites adjustment values (and flags) of CTDoxy and
CTDsal with the values from BOTsal and BOToxy for every cruise, unless CTDsal
(or CTDoxy) is not present or bad.
Salinity action ID:6; CTD salinity data good, setting CTD salinity offset and QC
flag to bottle values.
Oxygen action ID:5; CTD oxygen data good, setting CTD oxygen offset and QC flag
to bottle values.
Posted by svheuven@gmail.com on 2015-02-19 09:22:19 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
View 19 comment(s) (Lists all comments)
Autogenerated CTD salinity and CTD oxygen update
Automated update! This overwrites adjustment values (and flags) of CTDoxy and
CTDsal with the values from BOTsal and BOToxy for every cruise, unless CTDsal
(or CTDoxy) is not present or bad.
Salinity action ID:6; CTD salinity data good, setting CTD salinity offset and QC
flag to bottle values.
Oxygen action ID:5; CTD oxygen data good, setting CTD oxygen offset and QC flag
to bottle values.
Posted by svheuven@gmail.com on 2015-02-19 09:22:19 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - alkalinity
Automated update setting data quality flag from BAD to GOOD in order to retain
these non-QCed data in final product. SvH/GLODAPv2 / 2015-01-19)
Posted by svheuven@gmail.com on 2015-01-20 14:46:42 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/oxygen: update slope+intercept
autogenerated: BOToxy is compatible with unchanged CTDoxy
Posted by svheuven@gmail.com on 2014-12-18 16:52:45 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/salinity: update slope+intercept
autogenerated: BOTsal is compatible with CALIBRATED CTDsal
Posted by svheuven@gmail.com on 2014-12-18 16:52:45 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - oxygen
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - silicate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain. I cannot solve
these 35MF cruises for Silicate, and by this stage will happily just accept
anything Clair suggested for them.
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - phosphate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - nitrate
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : set to 1
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - alkalinity
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : set to -888
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - tCO2
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : maintain
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Autogenerated comment - salinity
Auto-uploaded comment from GLODAPv2 assessment by Steven van Heuven (src:
GLODAPv2 Adjustment IND and PAC_SvH_20140611.xlsx): : make -0.005. Inversion
result is clear
Posted by svheuven@gmail.com on 2014-06-16 15:50:37 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/oxygen: init slope+intercept
autogenerated: using BOToxy because bad fit of CTDoxy.
Posted by svheuven@gmail.com on 2014-02-25 17:02:15 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103/salinity: init slope+intercept
autogenerated: using mean of BOTsal and UNCHANGED CTDsal
Posted by svheuven@gmail.com on 2014-02-25 17:02:15 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - oxygen
OISO6: only one deep profiles (at 56°S).
INTERNAL OISO CONSISTENCY:
6 cross overs were analyzed. The average of all cross overs is 1.007 (+/-0.029).
3 cross overs show no significant differences (<1%) and involve cruises that are
thought to have no offset in oxygen. When the offsets suggested for the other
cruises are taken into account the average of all cross overs is 0.996
(+/-0.004). This suggests that no adjustment would be required.
OTHER CROSS OVERS:
The cross over with the cruise INDIGO3 shows a ratio of 1.006 (+/-0.006), which
supports the analysis above.
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for oxygen.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-21 13:23:48 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - silicate
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
11 cross overs were analyzed. The average of all cross overs is 1.025
(+/-0.046).
Only 2 cross overs found at 30°S show no significant differences (<2%) but they
involve cruises that are thought to have high silicate. When the suggested
offsets are taken into account the average of the 5 cross overs found at 30°S is
1.024 (+/-0.007). This suggests that a small adjustment could be required
(0.98).
At 56°S, however, when the suggested offsets as well as the suggested natural
variability are taken into account the average of the 6 cross overs is 1.001
(+/-0.003). This suggests that no adjustment would be required, but it is not
warranted since Antarctic deep waters are entitled to natural variability which
could mask the offset observed at 30°S.
OTHER CROSS OVERS:
The cross over with the cruise INDIGO1 (30°S) shows a ratio of 1.031 (+/-0.019),
which is in good agreement with the analysis above (given that INDIGO1 is
thought to have slightly low silicate).
The cross over with the cruise INDIGO3 (56°S) shows a ratio of 0.938 (+/-0.007),
but INDIGO3 is thought to have high silicate values. When the suggested offset
is taken into account as well as the suggested natural variability, a good
agreement is found with the OISO analysis above (1.008).
CONCLUSION:
The different results obtained at 30°S and 56°S are probably due to natural
changes that would have operate in Antarctic deep waters as suggested by the
analysis of other parameters including salinity.
Based on this I suggest an adjustment of 0.98 for silicate.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-21 13:23:29 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - nitrate
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
10 cross overs were analyzed. The average of all cross overs is 0.994 (+/-0.52).
4 cross overs show no significant differences (<2%), and 3 of them involve
cruises that are thought to have no offset in nitrate. When the suggested
offsets for the other cruises are taken into account as well as the suggested
natural variability at 56°S, the average of all cross overs is 1.004 (+/-0.005).
This suggests that no adjustment would be required.
OTHER CROSS OVERS:
The cross over with the cruise INDIGO1 (30°S) shows a ratio of 1.015 (+/-0.009)
and since INDIGO1 is thought to have no offset in nitrate, this supports the
result of the analysis above.
The cross over with the cruise INDIGO3 (56°S) shows a ratio of 1.049 (+/-0.013),
but INDIGO3 is thought to have low nitrate values. When the suggested offset is
taken into account as well as the suggested natural variability, a good
agreement is found with the analysis above (1.013).
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for nitrate.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-21 13:22:47 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - alkalinity
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
9 cross overs were analyzed. The average of all cross overs is -2.0 (+/-3.7)
umol/kg.
All cross overs but 2 show no significant differences (<5 umol/kg) and involve
cruises that are thought to have no offset in alkalinity. This suggests that no
adjustment would be required.
Note that cross overs found at 56°S show a large scatter around the mean (-3.0
+/-2.8 umol/kg), probably due to natural variability. And indeed, if a decrease
in alkalinity of 1 umol/kg/yr is assumed (as suggested in this study) the
scatter is reduced (-2.8 +/-1.2 umol/kg).
OTHER CROSS OVERS:
The cross overs with cruises INDIGO1 (30°S) and INDIGO3 (56°S) show differences
of -17.0 (+/-1.3) umol/kg and -14.7 (+/-3.0) umol/kg, respectively, but INDIGO1
is known to have high alkalinity values by about 16 umol/kg and INDIGO3 would
have no offset but alkalinity might have decreased by about 14 umol/kg. If this
is taken into account the offsets with INDIGO cruises translate into no
significant differences, which supports the analysis above.
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for alkalinity.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-08 23:53:55 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - tco2
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
11 cross overs were analyzed. The average of all cross overs is +1.4 (+/-3.9)
umol/kg.
7 cross overs show no significant differences (<4 umol/kg) and involve cruises
that are thought to have no offset in TCO2. When the offsets suggested for the
other cruises are taken into account the average of all cross overs is +0.3
(+/-3.1) umol/kg. This suggests that no adjustment would be required.
It should be noted, however, that larger offsets are found at 30°S (+2.9 +/-1.3
umol/kg), compared to 56°S (-1.8 +/-2.3 umol/kg). This difference could be
attributed to natural variability as suggested by the analysis of salinity data.
OTHER CROSS OVERS:
The cross overs with cruises INDIGO1 (30°S) and INDIGO3 (56°S) show offsets of
-8.4 (+/-4.6) umol/kg and -5.1 (+/-2.0) umol/kg, respectively. But since the
cruises INDIGO1 and INDIGO3 are known to have high TCO2 values by about 10
umol/kg and 6 umol/kg respectively (according to this study and GLODAP), the
differences translate into no significant offsets. This supports no adjustment.
CONCLUSION:
Based on the regional analyses above I suggest no adjustment for TCO2.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-08 23:53:35 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
35MF20010103 - salinity
OISO6: two deep profiles (at 30°S and 56°S).
Note: these 2 stations are treated as different cross overs in the analysis
below.
INTERNAL OISO CONSISTENCY:
11 cross overs were analyzed. The average of all cross overs is +6.1 (+/-9.0)
ppm.
9 cross overs show significant differences (>5 ppm) and involve cruises that are
thought to have no significant offset in salinity. When the offsets suggested
for the other cruises are taken into account the average of all cross overs is
+7.6 (+/-2.5) ppm. It should be noted, however, that lower offsets are found at
56°S (mean of +6 +/-1 ppm) compared to 30°S (mean of +10 +/-1 ppm).
OTHER CROSS OVERS:
The cross overs with cruises INDIGO1 (30°S) and INDIGO3 (56°S) show offsets of
+10 (+/-9) ppm and +3 (+/-3) ppm, respectively, which supports the analysis
above.
CONCLUSION:
Different results are obtained north or south of the Polar Front which should be
attributed to natural variability that is more likely to happen in Antarctic
deep waters than in Subtropical deep waters.
Based on this I suggest an adjustment of -10 ppm for salinity.
___________________
Paris, August 2008
Claire Lo Monaco
Posted by claire.lomonaco@locean.upmc.fr on 2008-10-08 23:53:01 UTC for data product: CARINA, GLODAPv2, v2.2019, v2.2020, v2.2021, v2.2022, v2.2023
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