Cruise: 74JC19990315 (dataset:GLODAPv2.2019) Data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023 Successor: GLODAPv3
Synonyms (including errata!) for this cruise: JR44; 74JC19990315; alias: JR44
IMPORTANT information for GLODAP Reference Group Editors: This adjustment version is immutable and published in GLODAPv2.2019! Click here to switch to new version (GLODAPv2.2019)
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Plot/Data files re. Parameter(s) (select parameter on left side to view!):
nitrate:12
oxygen:14
phosphate:11
salinity:13
silicate:12


| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ19980328_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06AQ20050122_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06AQ20060825_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06MT19900123_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 29HE19951203_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 316N19831007_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 316N19871123.1_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33LG20060321_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33RO20050111_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 740H20090203_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 74JC19950320_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 74JC20100319_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/salinity!] |
View | |

View comment(s) (filtered by salinity in subject)
GLODAPv3 release: autogenerated salinity update for 74JC19990315
GLODAPv3 release: salinity update of 74JC19990315 based on salinity_offset:
0.0000; inversion: 0.0000; inversion_full: -0.0003; preadjustment: 0;
offsets_raw: 0.0008; offsets_preadj: 0.0009; offsets_preadj_u: 0.0024;
offsets_post: 0.0005; offsets_post_u: 0.0023; offsets_post_rt: 0.0004;
numberofxovers: 25; 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
74JC19990315 - salinity
Most offstes are within the acceptable range centered around 0. Maintain.
Posted by nlange@geomar.de on 2018-06-15 11:45:55 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023




View comment(s) (filtered by tco2 in subject)
GLODAPv3 release: autogenerated tco2 update for 74JC19990315
GLODAPv3 release: tco2 update of 74JC19990315 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


View comment(s) (filtered by alkalinity in subject)
GLODAPv3 release: autogenerated alkalinity update for 74JC19990315
GLODAPv3 release: alkalinity update of 74JC19990315 based on alkalinity_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 13:46:33 UTC for data product: GLODAPv3


View comment(s) (filtered by ph in subject)
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 1.032.
Posted by nlange@geomar.de on 2026-08-05 16:37:50 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 74JC19990315
GLODAPv3 release: phosphate update of 74JC19990315 based on phosphate_offset:
3.2; inversion: 3.2; inversion_full: 3.3; preadjustment: 0; offsets_raw: -3.0;
offsets_preadj: -3.0; offsets_preadj_u: 0.7; offsets_post: 0.0; offsets_post_u:
0.6; offsets_post_rt: -0.1; numberofxovers: 16; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:35 UTC for data product: GLODAPv3
74JC19990315 - phosphate
All crossovers - except for 316N1987 - have offsets smaller 1. Most offsets are
even below the 2% limit.
Note that some measurements hint towards bad precision (strong outliers) of the
datat, i.e. recheck 1st QC. Nonetheless, following the weighted mean adjust
upward.
Posted by nlange@geomar.de on 2018-06-15 11:45:33 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023



| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 06AQ20060825_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 06MT19900123_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 29HE19951203_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 29HE20100208_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 316N19720718.1_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 316N19831007_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 316N19871123.1_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 33RO20050111_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 740H20090203_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 74JC20100319_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/nitrate!] |
View | |

View comment(s) (filtered by nitrate in subject)
GLODAPv3 release: converted value for nitrate_offset from percent to factor for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for nitrate_offset from percent
to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:25 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 74JC19990315
GLODAPv3 release: nitrate update of 74JC19990315 based on nitrate_offset: 0.0;
inversion: 0.0; inversion_full: -0.9; preadjustment: 0; offsets_raw: 0.9;
offsets_preadj: 0.9; offsets_preadj_u: 0.5; offsets_post: 1.0; offsets_post_u:
0.4; offsets_post_rt: 0.9; numberofxovers: 16; 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
74JC19990315 - nitrate
Most offsets are within the accepatble range. Some of the more recent cruises
indicate slightly too high concentrations though (74JC2010).
But that is not enough evidence for a small adjustment especially given the fact
that cruises close to 1999 do not show strong Offsets. Maintain.
Posted by nlange@geomar.de on 2018-06-15 11:43:53 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 06AQ20060825_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 06MT19900123_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 29HE19951203_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 29HE19960117_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 316N19720718.1_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 316N19871123.1_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 740H20090203_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 74JC19950320_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 74JC20100319_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/phosphate!] |
View | |

View comment(s) (filtered by phosphate in subject)
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 1.032.
Posted by nlange@geomar.de on 2026-08-05 16:37:50 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 74JC19990315
GLODAPv3 release: phosphate update of 74JC19990315 based on phosphate_offset:
3.2; inversion: 3.2; inversion_full: 3.3; preadjustment: 0; offsets_raw: -3.0;
offsets_preadj: -3.0; offsets_preadj_u: 0.7; offsets_post: 0.0; offsets_post_u:
0.6; offsets_post_rt: -0.1; numberofxovers: 16; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:35 UTC for data product: GLODAPv3
74JC19990315 - phosphate
All crossovers - except for 316N1987 - have offsets smaller 1. Most offsets are
even below the 2% limit.
Note that some measurements hint towards bad precision (strong outliers) of the
datat, i.e. recheck 1st QC. Nonetheless, following the weighted mean adjust
upward.
Posted by nlange@geomar.de on 2018-06-15 11:45:33 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ20050122_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 06AQ20060825_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 06MT19900123_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 29HE19951203_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 29HE19960117_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 29HE20100208_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 316N19720718.1_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 316N19871123.1_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 33RO20050111_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 740H20090203_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 74JC20100319_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/silicate!] |
View | |

View comment(s) (filtered by silicate in subject)
GLODAPv3 release: converted value for silicate_offset from percent to factor for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: 0.973.
Posted by nlange@geomar.de on 2026-08-05 16:38:04 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 74JC19990315[1-last] based on
silicate_offset: -2.7; inversion: 2.3; inversion_full: 2.4; preadjustment: -5;
offsets_raw: -1.6; offsets_preadj: -1.6; offsets_preadj_u: 0.9; offsets_post:
-0.0; offsets_post_u: 0.6; offsets_post_rt: -0.0; numberofxovers: 16;
trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-05 14:17:34 UTC for data product: GLODAPv3
74JC19990315 - silicate
This cruise clearly appears to be too high. The weighted mean does indeed also
show this. The x-overs that would show that this cruise be too low, are not
convincing x-overs (variability and too different station locations for
comparison). I would even suggest a larger adjustment, namely 0.97 because of
this and the fact that especially the most recent x-over cruises are clearly
lower than the rest.
Posted by mario.hoppema@awi.de on 2018-10-01 14:27:22 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - silicate
These silicate data are consistently high with recent cruises. Adjust down byh
3%
Posted by siv.lauvset@uib.no on 2018-10-01 10:31:27 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - silicate
There are three "bad" outliers which distort the overall impression of at least
2% too high concentrations.
Other crossover agree nicely. Adjust downward.
Posted by nlange@geomar.de on 2018-06-15 11:46:57 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06AQ19980328_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06AQ20050122_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06AQ20060825_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06MT19900123_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 29HE19951203_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 316N19720718.1_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 316N19831007_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 316N19871123.1_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33LG20060321_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33RO20050111_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 740H20090203_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 74JC19950320_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 74JC20100319_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/oxygen!] |
View | |

View comment(s) (filtered by oxygen in subject)
GLODAPv3 release: converted value for oxygen_offset from percent to factor for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 1.019.
Posted by nlange@geomar.de on 2026-08-05 16:37:37 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 74JC19990315
GLODAPv3 release: oxygen update of 74JC19990315 based on oxygen_offset: 1.9;
inversion: -0.1; inversion_full: 0.4; preadjustment: 2; offsets_raw: 0.2;
offsets_preadj: 0.2; offsets_preadj_u: 0.7; offsets_post: 0.0; offsets_post_u:
0.4; offsets_post_rt: 0.0; numberofxovers: 20; 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
74JC19990315 - oxygen
All crossovers indicate too low concentrations, i.e. there is a nice agreement.
Further, the offset is quite consistent in depth. Adjust accordingly to 06AQ1998
- hence adjustment is rather on the conservative side...
Posted by nlange@geomar.de on 2018-06-15 11:43:07 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023














View 27 comment(s) (Lists all comments)
GLODAPv3 release: converted value for silicate_offset from percent to factor for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: 0.973.
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 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 1.032.
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 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 1.019.
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 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for nitrate_offset from percent
to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:25 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 74JC19990315[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 74JC19990315[1-last] based on
silicate_offset: -2.7; inversion: 2.3; inversion_full: 2.4; preadjustment: -5;
offsets_raw: -1.6; offsets_preadj: -1.6; offsets_preadj_u: 0.9; offsets_post:
-0.0; offsets_post_u: 0.6; offsets_post_rt: -0.0; numberofxovers: 16;
trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-05 14:17:34 UTC for data product: GLODAPv3
74JC19990315[1-last] GLODAPv3 release
GLODAPv3 release: silicate autogenerated adjustment parameter update for
74JC19990315 - 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 74JC19990315[1-last]
Automated addition of temperature as NEW parameter to 74JC19990315[1-last] based
on temperature_offset: 0.
Posted by nlange@geomar.de on 2026-08-05 14:17:19 UTC for data product: GLODAPv3
74JC19990315[1-last] GLODAPv3 release
Automated addition of temperature as NEW adjustment parameter in GLODAPv3 to
74JC19990315[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 74JC19990315
GLODAPv3 release: tco2 update of 74JC19990315 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
74JC19990315 GLODAPv3 release
GLODAPv3 release: tco2 autogenerated adjustment parameter update for
74JC19990315 - 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 74JC19990315
GLODAPv3 release: salinity update of 74JC19990315 based on salinity_offset:
0.0000; inversion: 0.0000; inversion_full: -0.0003; preadjustment: 0;
offsets_raw: 0.0008; offsets_preadj: 0.0009; offsets_preadj_u: 0.0024;
offsets_post: 0.0005; offsets_post_u: 0.0023; offsets_post_rt: 0.0004;
numberofxovers: 25; 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
74JC19990315 GLODAPv3 release
GLODAPv3 release: salinity autogenerated adjustment parameter update for
74JC19990315 - 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 74JC19990315
GLODAPv3 release: phosphate update of 74JC19990315 based on phosphate_offset:
3.2; inversion: 3.2; inversion_full: 3.3; preadjustment: 0; offsets_raw: -3.0;
offsets_preadj: -3.0; offsets_preadj_u: 0.7; offsets_post: 0.0; offsets_post_u:
0.6; offsets_post_rt: -0.1; numberofxovers: 16; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:35 UTC for data product: GLODAPv3
74JC19990315 GLODAPv3 release
GLODAPv3 release: phosphate autogenerated adjustment parameter update for
74JC19990315 - 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 74JC19990315
GLODAPv3 release: oxygen update of 74JC19990315 based on oxygen_offset: 1.9;
inversion: -0.1; inversion_full: 0.4; preadjustment: 2; offsets_raw: 0.2;
offsets_preadj: 0.2; offsets_preadj_u: 0.7; offsets_post: 0.0; offsets_post_u:
0.4; offsets_post_rt: 0.0; numberofxovers: 20; 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
74JC19990315 GLODAPv3 release
GLODAPv3 release: oxygen autogenerated adjustment parameter update for
74JC19990315 - 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 74JC19990315
GLODAPv3 release: nitrate update of 74JC19990315 based on nitrate_offset: 0.0;
inversion: 0.0; inversion_full: -0.9; preadjustment: 0; offsets_raw: 0.9;
offsets_preadj: 0.9; offsets_preadj_u: 0.5; offsets_post: 1.0; offsets_post_u:
0.4; offsets_post_rt: 0.9; numberofxovers: 16; 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
74JC19990315 GLODAPv3 release
GLODAPv3 release: nitrate autogenerated adjustment parameter update for
74JC19990315 - 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 74JC19990315
GLODAPv3 release: alkalinity update of 74JC19990315 based on alkalinity_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 13:46:33 UTC for data product: GLODAPv3
74JC19990315 GLODAPv3 release
GLODAPv3 release: alkalinity autogenerated adjustment parameter update for
74JC19990315 - 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
74JC19990315 - silicate
This cruise clearly appears to be too high. The weighted mean does indeed also
show this. The x-overs that would show that this cruise be too low, are not
convincing x-overs (variability and too different station locations for
comparison). I would even suggest a larger adjustment, namely 0.97 because of
this and the fact that especially the most recent x-over cruises are clearly
lower than the rest.
Posted by mario.hoppema@awi.de on 2018-10-01 14:27:22 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - silicate
These silicate data are consistently high with recent cruises. Adjust down byh
3%
Posted by siv.lauvset@uib.no on 2018-10-01 10:31:27 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - silicate
There are three "bad" outliers which distort the overall impression of at least
2% too high concentrations.
Other crossover agree nicely. Adjust downward.
Posted by nlange@geomar.de on 2018-06-15 11:46:57 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - salinity
Most offstes are within the acceptable range centered around 0. Maintain.
Posted by nlange@geomar.de on 2018-06-15 11:45:55 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - phosphate
All crossovers - except for 316N1987 - have offsets smaller 1. Most offsets are
even below the 2% limit.
Note that some measurements hint towards bad precision (strong outliers) of the
datat, i.e. recheck 1st QC. Nonetheless, following the weighted mean adjust
upward.
Posted by nlange@geomar.de on 2018-06-15 11:45:33 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - nitrate
Most offsets are within the accepatble range. Some of the more recent cruises
indicate slightly too high concentrations though (74JC2010).
But that is not enough evidence for a small adjustment especially given the fact
that cruises close to 1999 do not show strong Offsets. Maintain.
Posted by nlange@geomar.de on 2018-06-15 11:43:53 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
74JC19990315 - oxygen
All crossovers indicate too low concentrations, i.e. there is a nice agreement.
Further, the offset is quite consistent in depth. Adjust accordingly to 06AQ1998
- hence adjustment is rather on the conservative side...
Posted by nlange@geomar.de on 2018-06-15 11:43:07 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
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