Cruise: 74JC20151217 (dataset:GLODAPv2.2019) Data product: GLODAPv3 Predecessor: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
Synonyms (including errata!) for this cruise: SR01b; 74JC20151217; alias: SR01b; 74JC20151217; sr1b; JR15003; SOCCOM-5
IMPORTANT information for GLODAP Reference Group Editors: This is the updated adjustment version (GLODAPv3) from GLODAPv2.2023! Click here to view previous (immutable) version (GLODAPv2.2023)
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Plot/Data files re. Parameter(s) (select parameter on left side to view!):
alkalinity:6
nitrate:8
oxygen:9
phosphate:8
salinity:11


| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 06AQ20060825_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 06AQ20080210_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 316N19840203_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 740H20090203_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 74JC19990315_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 74JC20001121_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 74JC20150110_74JC20151217_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 74JC20151217_74JC20161110_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 74JC20151217_74JC20181103_salinity__Xover_SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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| 74JC20151217_salinity__SAL.png | [GLODAPv3 release: autogenerated from RC_Nico/salinity for: 74JC20151217[1-last] |
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View annotation(s) (filtered by salinity in subject)
GLODAPv3 release: autogenerated salinity update for 74JC20151217
GLODAPv3 release: salinity update of 74JC20151217 based on salinity_offset:
-888.0000; inversion: 0.0000; inversion_full: -0.0018; preadjustment: 0;
offsets_raw: 0.0035; offsets_preadj: 0.0027; offsets_preadj_u: 0.0057;
offsets_post: 0.0030; offsets_post_u: 0.0049; offsets_post_rt: 0.0047;
numberofxovers: 10; trends_pre: 0.0000; trends_adj: 0.0000.
Posted by nlange@geomar.de on 2026-08-04 17:11:50 UTC for data product: GLODAPv3
74JC20151217 - salinity
The four reliable crossovers indicate quite accurate data.
Very nice match with 740H2009. Maintain.
Posted by nlange@geomar.de on 2018-06-15 12:10:57 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023




View annotation(s) (filtered by tco2 in subject)
GLODAPv3 release: autogenerated tco2 update for 74JC20151217
GLODAPv3 release: tco2 update of 74JC20151217 based on tco2_offset: -999.0;
inversion: NaN; inversion_full: NaN; preadjustment: NaN; offsets_raw: NaN;
offsets_preadj: NaN; offsets_preadj_u: NaN; offsets_post: NaN; offsets_post_u:
NaN; offsets_post_rt: NaN; numberofxovers: NaN; trends_pre: NaN; trends_adj:
NaN.
Posted by nlange@geomar.de on 2026-08-04 17:12:21 UTC for data product: GLODAPv3

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20060825_74JC20151217_alkalinity_Xover_ALK.png | [GLODAPv3 release: autogenerated from RC_Nico/alkalinity for: 74JC20151217[1-last] |
View | |
| 06AQ20080210_74JC20151217_alkalinity_Xover_ALK.png | [GLODAPv3 release: autogenerated from RC_Nico/alkalinity for: 74JC20151217[1-last] |
View | |
| 316N19840203_74JC20151217_alkalinity_Xover_ALK.png | [GLODAPv3 release: autogenerated from RC_Nico/alkalinity for: 74JC20151217[1-last] |
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| 740H20090203_74JC20151217_alkalinity_Xover_ALK.png | [GLODAPv3 release: autogenerated from RC_Nico/alkalinity for: 74JC20151217[1-last] |
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| 74JC20151217_74JC20181103_alkalinity_Xover_ALK.png | [GLODAPv3 release: autogenerated from RC_Nico/alkalinity for: 74JC20151217[1-last] |
View | |
| 74JC20151217_alkalinity__ALK.png | [GLODAPv3 release: autogenerated from RC_Nico/alkalinity for: 74JC20151217[1-last] |
View | |

View annotation(s) (filtered by alkalinity in subject)
GLODAPv3 release: autogenerated alkalinity update for 74JC20151217
GLODAPv3 release: alkalinity update of 74JC20151217 based on alkalinity_offset:
-888.0; inversion: 0.0; inversion_full: -0.9; preadjustment: 0; offsets_raw:
4.0; offsets_preadj: 4.1; offsets_preadj_u: 6.4; offsets_post: 1.2;
offsets_post_u: 0.8; offsets_post_rt: 0.9; numberofxovers: 4; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 13:46:33 UTC for data product: GLODAPv3
74JC20151217 - alkalinity
The two only crossovers differ quite a lot in their offset. However, both are
within the acceptable range. The deep water average, as well as the MLR analyses
indicate good accuracy. Note that the two MLR offsets also differ - this might
be a consequence of slightly too high phosphate concentrations. Maintain.
Posted by nlange@geomar.de on 2018-08-22 07:44:23 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_74JC20151217_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
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| 06AQ20060825_74JC20151217_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
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| 06AQ20080210_74JC20151217_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
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| 316N19840203_74JC20151217_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
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| 740H20090203_74JC20151217_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
View | |
| 74JC19990315_74JC20151217_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
View | |
| 74JC20151217_74JC20181103_nitrate__Xover_NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
View | |
| 74JC20151217_nitrate__NO3.png | [GLODAPv3 release: autogenerated from RC_Nico/nitrate for: 74JC20151217[1-last] |
View | |

View annotation(s) (filtered by nitrate in subject)
GLODAPv3 release: converted value for nitrate_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for nitrate_offset from percent
to factor: 0.984.
Posted by nlange@geomar.de on 2026-08-05 16:37:25 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 74JC20151217
GLODAPv3 release: nitrate update of 74JC20151217 based on nitrate_offset: -1.6;
inversion: -1.6; inversion_full: -1.6; preadjustment: 0; offsets_raw: 1.7;
offsets_preadj: 1.6; offsets_preadj_u: 0.5; offsets_post: -0.0; offsets_post_u:
0.3; offsets_post_rt: 0.3; numberofxovers: 6; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:08 UTC for data product: GLODAPv3
74JC20151217 - nitrate
Following discussion in Seattle we adjust nitrate down by 2%. Note that the
nutrients were frozen on this cruise so this adjustment is quite small.
Posted by siv.lauvset@uib.no on 2018-10-01 10:34:50 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - nitrate
Maintain. Note that this analysis is based on only three crossovers with very
scattery profiles and quite sparse data in general. It is supported by a
comparison of the deep water averages as well as additional MLR analyses though.
Posted by nlange@geomar.de on 2018-06-15 12:09:41 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_74JC20151217_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |
| 06AQ20060825_74JC20151217_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |
| 06AQ20080210_74JC20151217_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |
| 316N19840203_74JC20151217_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
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| 740H20090203_74JC20151217_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |
| 74JC19990315_74JC20151217_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |
| 74JC20151217_74JC20181103_phosphate__Xover_PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |
| 74JC20151217_phosphate__PO4.png | [GLODAPv3 release: autogenerated from RC_Nico/phosphate for: 74JC20151217[1-last] |
View | |

View annotation(s) (filtered by phosphate in subject)
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.975.
Posted by nlange@geomar.de on 2026-08-05 16:37:50 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 74JC20151217
GLODAPv3 release: phosphate update of 74JC20151217 based on phosphate_offset:
-2.5; inversion: -2.5; inversion_full: -2.0; preadjustment: 0; offsets_raw: 2.0;
offsets_preadj: 2.5; offsets_preadj_u: 0.6; offsets_post: 0.0; offsets_post_u:
0.6; offsets_post_rt: 0.2; numberofxovers: 6; trends_pre: -0.1; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:35 UTC for data product: GLODAPv3
74JC20151217 - phosphate
Although only three x-overs, these are with cruises with reliable and precise
data: 06AQ20050122 and 06AQ20080210. The data of this cruise are clearly too
high, given those reliable cruises. Because the height of the offset is somewhat
less than with NO3, I suggest an adjustment of 0.99.
Posted by mario.hoppema@awi.de on 2018-10-01 14:34:34 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - phosphate
Following discussion in Seattle we adjust phosphate down by 1%. Note that the
nutrients were frozen on this cruise so this adjustment is quite small.
Posted by siv.lauvset@uib.no on 2018-10-01 10:35:07 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - phosphate
Only 740H2009 shows an offset above the 2% range (out of 3 offsets in total).
Thus, based on these very restricted results, no strong offset "expected". The
MLR analyses (28 samples) support this result. Maintain.
Posted by nlange@geomar.de on 2018-06-15 12:10:31 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023


View annotation(s) (filtered by silicate in subject)
GLODAPv3 release: converted value for silicate_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: -999.0.
Posted by nlange@geomar.de on 2026-08-05 16:38:04 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 74JC20151217[1-last] based on
silicate_offset: -999.0; inversion: NaN; inversion_full: NaN; preadjustment:
NaN; offsets_raw: NaN; offsets_preadj: NaN; offsets_preadj_u: NaN; offsets_post:
NaN; offsets_post_u: NaN; offsets_post_rt: NaN; numberofxovers: NaN; trends_pre:
NaN; trends_adj: NaN.
Posted by nlange@geomar.de on 2026-08-05 14:17:34 UTC for data product: GLODAPv3

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_74JC20151217_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 06AQ20060825_74JC20151217_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 06AQ20080210_74JC20151217_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 316N19840203_74JC20151217_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 740H20090203_74JC20151217_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 74JC19990315_74JC20151217_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 74JC20151217_74JC20161110_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 74JC20151217_74JC20181103_oxygen__Xover_O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |
| 74JC20151217_oxygen__O2.png | [GLODAPv3 release: autogenerated from RC_Nico/oxygen for: 74JC20151217[1-last] |
View | |

View annotation(s) (filtered by oxygen in subject)
GLODAPv3 release: converted value for oxygen_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:37 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 74JC20151217
GLODAPv3 release: oxygen update of 74JC20151217 based on oxygen_offset: 0.0;
inversion: 0.0; inversion_full: 0.8; preadjustment: 0; offsets_raw: -0.5;
offsets_preadj: -0.5; offsets_preadj_u: 0.5; offsets_post: -0.4; offsets_post_u:
0.3; offsets_post_rt: -0.4; numberofxovers: 8; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:22 UTC for data product: GLODAPv3
74JC20151217 - oxygen
Three out of four (in total) offsets are within the acceptable range. 740H2009
is the only cruise indicating a "larger" negative offset (0.9877). A comparison
of the deep water averages does indicate too low concentrations, too. Additional
MLR analyses however only show offsets between 0.4% and 0.8%... Not enough for
an adjustment.
Posted by nlange@geomar.de on 2018-06-15 12:08:46 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023




View annotation(s) (filtered by temperature in subject)
GLODAPv3 release: temperature added as NEW adjustment parameter to 74JC20151217[1-last]
Automated addition of temperature as NEW parameter to 74JC20151217[1-last] based
on temperature_offset: -888.
Posted by nlange@geomar.de on 2026-08-05 14:17:19 UTC for data product: GLODAPv3












View 29 annotation(s) (Lists all annotations)
GLODAPv3 release: converted value for silicate_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: -999.0.
Posted by nlange@geomar.de on 2026-08-05 16:38:04 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.975.
Posted by nlange@geomar.de on 2026-08-05 16:37:50 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for oxygen_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:37 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for nitrate_offset from percent to factor for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for nitrate_offset from percent
to factor: 0.984.
Posted by nlange@geomar.de on 2026-08-05 16:37:25 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 74JC20151217[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 74JC20151217[1-last] based on
silicate_offset: -999.0; inversion: NaN; inversion_full: NaN; preadjustment:
NaN; offsets_raw: NaN; offsets_preadj: NaN; offsets_preadj_u: NaN; offsets_post:
NaN; offsets_post_u: NaN; offsets_post_rt: NaN; numberofxovers: NaN; trends_pre:
NaN; trends_adj: NaN.
Posted by nlange@geomar.de on 2026-08-05 14:17:34 UTC for data product: GLODAPv3
74JC20151217[1-last] GLODAPv3 release
GLODAPv3 release: silicate autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-05 14:17:34 UTC for data product: GLODAPv3
GLODAPv3 release: temperature added as NEW adjustment parameter to 74JC20151217[1-last]
Automated addition of temperature as NEW parameter to 74JC20151217[1-last] based
on temperature_offset: -888.
Posted by nlange@geomar.de on 2026-08-05 14:17:19 UTC for data product: GLODAPv3
74JC20151217[1-last] GLODAPv3 release
Automated addition of temperature as NEW adjustment parameter in GLODAPv3 to
74JC20151217[1-last] - select parameter to view annotation with specific
details.
Posted by nlange@geomar.de on 2026-08-05 14:17:19 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated tco2 update for 74JC20151217
GLODAPv3 release: tco2 update of 74JC20151217 based on tco2_offset: -999.0;
inversion: NaN; inversion_full: NaN; preadjustment: NaN; offsets_raw: NaN;
offsets_preadj: NaN; offsets_preadj_u: NaN; offsets_post: NaN; offsets_post_u:
NaN; offsets_post_rt: NaN; numberofxovers: NaN; trends_pre: NaN; trends_adj:
NaN.
Posted by nlange@geomar.de on 2026-08-04 17:12:21 UTC for data product: GLODAPv3
74JC20151217 GLODAPv3 release
GLODAPv3 release: tco2 autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:12:21 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated salinity update for 74JC20151217
GLODAPv3 release: salinity update of 74JC20151217 based on salinity_offset:
-888.0000; inversion: 0.0000; inversion_full: -0.0018; preadjustment: 0;
offsets_raw: 0.0035; offsets_preadj: 0.0027; offsets_preadj_u: 0.0057;
offsets_post: 0.0030; offsets_post_u: 0.0049; offsets_post_rt: 0.0047;
numberofxovers: 10; trends_pre: 0.0000; trends_adj: 0.0000.
Posted by nlange@geomar.de on 2026-08-04 17:11:50 UTC for data product: GLODAPv3
74JC20151217 GLODAPv3 release
GLODAPv3 release: salinity autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:50 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 74JC20151217
GLODAPv3 release: phosphate update of 74JC20151217 based on phosphate_offset:
-2.5; inversion: -2.5; inversion_full: -2.0; preadjustment: 0; offsets_raw: 2.0;
offsets_preadj: 2.5; offsets_preadj_u: 0.6; offsets_post: 0.0; offsets_post_u:
0.6; offsets_post_rt: 0.2; numberofxovers: 6; trends_pre: -0.1; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:35 UTC for data product: GLODAPv3
74JC20151217 GLODAPv3 release
GLODAPv3 release: phosphate autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:35 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 74JC20151217
GLODAPv3 release: oxygen update of 74JC20151217 based on oxygen_offset: 0.0;
inversion: 0.0; inversion_full: 0.8; preadjustment: 0; offsets_raw: -0.5;
offsets_preadj: -0.5; offsets_preadj_u: 0.5; offsets_post: -0.4; offsets_post_u:
0.3; offsets_post_rt: -0.4; numberofxovers: 8; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:22 UTC for data product: GLODAPv3
74JC20151217 GLODAPv3 release
GLODAPv3 release: oxygen autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:22 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 74JC20151217
GLODAPv3 release: nitrate update of 74JC20151217 based on nitrate_offset: -1.6;
inversion: -1.6; inversion_full: -1.6; preadjustment: 0; offsets_raw: 1.7;
offsets_preadj: 1.6; offsets_preadj_u: 0.5; offsets_post: -0.0; offsets_post_u:
0.3; offsets_post_rt: 0.3; numberofxovers: 6; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:08 UTC for data product: GLODAPv3
74JC20151217 GLODAPv3 release
GLODAPv3 release: nitrate autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:08 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated alkalinity update for 74JC20151217
GLODAPv3 release: alkalinity update of 74JC20151217 based on alkalinity_offset:
-888.0; inversion: 0.0; inversion_full: -0.9; preadjustment: 0; offsets_raw:
4.0; offsets_preadj: 4.1; offsets_preadj_u: 6.4; offsets_post: 1.2;
offsets_post_u: 0.8; offsets_post_rt: 0.9; numberofxovers: 4; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 13:46:33 UTC for data product: GLODAPv3
74JC20151217 GLODAPv3 release
GLODAPv3 release: alkalinity autogenerated adjustment parameter update for
74JC20151217 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 13:46:33 UTC for data product: GLODAPv3
74JC20151217 - phosphate
Although only three x-overs, these are with cruises with reliable and precise
data: 06AQ20050122 and 06AQ20080210. The data of this cruise are clearly too
high, given those reliable cruises. Because the height of the offset is somewhat
less than with NO3, I suggest an adjustment of 0.99.
Posted by mario.hoppema@awi.de on 2018-10-01 14:34:34 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - phosphate
Following discussion in Seattle we adjust phosphate down by 1%. Note that the
nutrients were frozen on this cruise so this adjustment is quite small.
Posted by siv.lauvset@uib.no on 2018-10-01 10:35:07 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - nitrate
Following discussion in Seattle we adjust nitrate down by 2%. Note that the
nutrients were frozen on this cruise so this adjustment is quite small.
Posted by siv.lauvset@uib.no on 2018-10-01 10:34:50 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - ph
Two crossovers and the interconsistency check (type 3) indicate a strong
negative bias, i.e. a too low value. An adjustment of at least 0.025 would be
needed. Given that the interconsistency check is based on 2 tco2 crossovers only
(and additional MLR analyses) it is rather difficult whether to apply such a
strong adjustment ....
Posted by nlange@geomar.de on 2018-08-22 07:50:38 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - alkalinity
The two only crossovers differ quite a lot in their offset. However, both are
within the acceptable range. The deep water average, as well as the MLR analyses
indicate good accuracy. Note that the two MLR offsets also differ - this might
be a consequence of slightly too high phosphate concentrations. Maintain.
Posted by nlange@geomar.de on 2018-08-22 07:44:23 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - salinity
The four reliable crossovers indicate quite accurate data.
Very nice match with 740H2009. Maintain.
Posted by nlange@geomar.de on 2018-06-15 12:10:57 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - phosphate
Only 740H2009 shows an offset above the 2% range (out of 3 offsets in total).
Thus, based on these very restricted results, no strong offset "expected". The
MLR analyses (28 samples) support this result. Maintain.
Posted by nlange@geomar.de on 2018-06-15 12:10:31 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - nitrate
Maintain. Note that this analysis is based on only three crossovers with very
scattery profiles and quite sparse data in general. It is supported by a
comparison of the deep water averages as well as additional MLR analyses though.
Posted by nlange@geomar.de on 2018-06-15 12:09:41 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC20151217 - oxygen
Three out of four (in total) offsets are within the acceptable range. 740H2009
is the only cruise indicating a "larger" negative offset (0.9877). A comparison
of the deep water averages does indicate too low concentrations, too. Additional
MLR analyses however only show offsets between 0.4% and 0.8%... Not enough for
an adjustment.
Posted by nlange@geomar.de on 2018-06-15 12:08:46 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
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