Cruise: 58GS20130717 (dataset:GLODAPv2.2019) Data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023 Successor: GLODAPv3
Synonyms (including errata!) for this cruise: GOS2013109; 58GS20130717; alias: GOS2013109
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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| Filename: | Comment: | Action | |
|---|---|---|---|
| Redfield.png | View | ||

Plot/Data files re. Parameter(s) (select parameter on left side to view!):
alkalinity:8
cruise:1
nitrate:12
oxygen:12
phosphate:11
salinity:12
silicate:13
tco2:10


| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58AA19970225_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58AA20010527_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58GS20030922_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58GS20060721_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58GS20090528_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58JH19931106_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58JH19970414_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 58JH20000527_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 74JC19960720_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 77DN20020420_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 58GS20130717
GLODAPv3 release: salinity update of 58GS20130717 based on salinity_offset:
0.0000; inversion: -0.0068; inversion_full: -0.0055; preadjustment: 0;
offsets_raw: 0.0180; offsets_preadj: 0.0069; offsets_preadj_u: 0.0018;
offsets_post: -0.0000; offsets_post_u: 0.0016; offsets_post_rt: 0.0138;
numberofxovers: 26; trends_pre: 0.0007; trends_adj: 0.0007.
Posted by nlange@geomar.de on 2026-08-04 17:11:49 UTC for data product: GLODAPv3
58GS20130717 - salinity
There is a temporal trend towards more saline water.
Still, the offset to the GS2009 cruise is very high (0.0086). Further, the
offsets are strongly depth dependant.
Need to consider a slight adjustment to put this cruise (at least) on the trend
line…
Posted by nlange@geomar.de on 2018-06-14 14:05:39 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023



| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 58AA19970225_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 58AA19980308_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 58GS20030922_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 58GS20060721_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 58GS20090528_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 58JH19970414_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 74JC19960720_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 77DN20020420_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| Xresults_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |

View comment(s) (filtered by tco2 in subject)
GLODAPv3 release: autogenerated tco2 update for 58GS20130717
GLODAPv3 release: tco2 update of 58GS20130717 based on tco2_offset: 0.0;
inversion: 0.0; inversion_full: -0.2; preadjustment: 0; offsets_raw: 2.4;
offsets_preadj: 0.7; offsets_preadj_u: 0.6; offsets_post: 0.4; offsets_post_u:
0.3; offsets_post_rt: 2.1; numberofxovers: 15; trends_pre: 0.2; trends_adj: 0.2.
Posted by nlange@geomar.de on 2026-08-04 17:12:19 UTC for data product: GLODAPv3
58GS20130717 - tco2
Analysis performed for normalized tco2 (Frijs et al. 2003).
There is a temporal trend towards higher concentrations. The most recent
cruises(younger 2002)show offsets within the limits. Maintain.
Posted by nlange@geomar.de on 2018-06-14 13:57:45 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 58GS20030922_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 58GS20060721_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 58GS20090528_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 58JH19970414_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 74JC19960720_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 77DN20020420_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| Xresults_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |

View comment(s) (filtered by alkalinity in subject)
GLODAPv3 release: autogenerated alkalinity update for 58GS20130717
GLODAPv3 release: alkalinity update of 58GS20130717 based on alkalinity_offset:
0.0; inversion: 0.0; inversion_full: -1.4; preadjustment: 0; offsets_raw: 1.4;
offsets_preadj: 1.4; offsets_preadj_u: 0.9; offsets_post: 1.5; offsets_post_u:
0.4; offsets_post_rt: 1.6; numberofxovers: 13; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 13:46:32 UTC for data product: GLODAPv3
58GS20130717 - alkalinity
Analysis performed for normalized alkalinity (Frijs et al. 2003).
The data is very scattery. However, all offsets are within the limits - mostly
postive. But the uncertainty in this region remains quite large - see also the
standard deviations of the offsets. Maintain.
Posted by nlange@geomar.de on 2018-06-14 13:59:30 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023


View comment(s) (filtered by ph in subject)
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.9299999999999999.
Posted by nlange@geomar.de on 2026-08-05 16:37:49 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 58GS20130717
GLODAPv3 release: phosphate update of 58GS20130717 based on phosphate_offset:
-7.0; inversion: -1.0; inversion_full: -0.8; preadjustment: -9; offsets_raw:
0.8; offsets_preadj: 0.7; offsets_preadj_u: 0.8; offsets_post: -0.0;
offsets_post_u: 0.4; offsets_post_rt: 0.1; numberofxovers: 20; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:34 UTC for data product: GLODAPv3
58GS20130717 - phosphate
Most crossovers indicate at least 10% too high values. Given the nice agreement
between the different offsets, adjust accordingly to the weighted mean downward.
Posted by nlange@geomar.de on 2018-06-14 14:02:45 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023



| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58AA19980308_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58GS20030922_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58GS20060721_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58GS20090528_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58JH19921105_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58JH19951108_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58JH19960720_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 58JH19970414_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 74JC19960720_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 77DN20020420_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| Xresults_press.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 58GS20130717[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 16:37:24 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 58GS20130717
GLODAPv3 release: nitrate update of 58GS20130717 based on nitrate_offset: 0.0;
inversion: 0.0; inversion_full: -1.6; preadjustment: 0; offsets_raw: 1.6;
offsets_preadj: 1.3; offsets_preadj_u: 0.5; offsets_post: 1.4; offsets_post_u:
0.3; offsets_post_rt: 1.9; numberofxovers: 24; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:07 UTC for data product: GLODAPv3
58GS20130717 - nitrate
Crossovers older 2000 indicate slightly too high concentrations, however given
the quality of many of these crossovers those results are doubtful. Also note
that the offsets of the different rossovers show a large variability, especially
JH cruises (compare both JH1996 cruises). Further, the more recent cruises fall
into the acceptable range. Maintain.
Posted by nlange@geomar.de on 2018-06-14 14:01:44 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58AA19950217_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58GS20030922_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58GS20060721_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58GS20090528_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58JH19941028_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58JH19970414_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 58JH20000527_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 74JC19960720_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 77DN20020420_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| Xresults_press.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 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.9299999999999999.
Posted by nlange@geomar.de on 2026-08-05 16:37:49 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 58GS20130717
GLODAPv3 release: phosphate update of 58GS20130717 based on phosphate_offset:
-7.0; inversion: -1.0; inversion_full: -0.8; preadjustment: -9; offsets_raw:
0.8; offsets_preadj: 0.7; offsets_preadj_u: 0.8; offsets_post: -0.0;
offsets_post_u: 0.4; offsets_post_rt: 0.1; numberofxovers: 20; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:34 UTC for data product: GLODAPv3
58GS20130717 - phosphate
Most crossovers indicate at least 10% too high values. Given the nice agreement
between the different offsets, adjust accordingly to the weighted mean downward.
Posted by nlange@geomar.de on 2018-06-14 14:02:45 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58AA19980308_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58GS20030922_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58GS20060721_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58GS20090528_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58JH19941028_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58JH19950427_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58JH19951108_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58JH19970414_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 58JH20000527_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 74JC19960720_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 77DN20020420_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| Xresults_press.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 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: 0.95.
Posted by nlange@geomar.de on 2026-08-05 16:38:03 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 58GS20130717[1-last] based on
silicate_offset: -5.0; inversion: 0.0; inversion_full: 0.6; preadjustment: 0;
offsets_raw: 10.8; offsets_preadj: -0.1; offsets_preadj_u: 0.8; offsets_post:
-0.5; offsets_post_u: 0.5; offsets_post_rt: 7.5; numberofxovers: 16; trends_pre:
0.8; trends_adj: 0.7.
Posted by nlange@geomar.de on 2026-08-05 14:17:33 UTC for data product: GLODAPv3
58GS20130717 - silicate
There seems to be a temporal trend towards higher concentrations until 2000. But
that trend seems to have stopped. Following the two most recent GS cruises (2006
& 2009) a 1.05 offset seems reasonable. Adjust downward accordingly.
Note that the data is very precise.
Posted by nlange@geomar.de on 2018-06-14 14:06:57 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 316N20020530_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58AA19980308_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58AA20010527_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58GS20030922_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58GS20060721_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58GS20090528_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58JH19921105_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58JH19970414_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 58JH20000527_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 74JC19960720_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 77DN20020420_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| Xresults_press.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 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 1.09.
Posted by nlange@geomar.de on 2026-08-05 16:37:36 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 58GS20130717
GLODAPv3 release: oxygen update of 58GS20130717 based on oxygen_offset: 9.0;
inversion: -0.7; inversion_full: -0.6; preadjustment: 9; offsets_raw: -0.7;
offsets_preadj: 0.8; offsets_preadj_u: 0.1; offsets_post: -0.0; offsets_post_u:
0.1; offsets_post_rt: -1.5; numberofxovers: 26; trends_pre: -0.1; trends_adj:
-0.2.
Posted by nlange@geomar.de on 2026-08-04 17:11:21 UTC for data product: GLODAPv3
58GS20130717 - oxygen
All crossvers show roughly 10% too low concentrations. Crossovers with cruises
older 1995 show rather stronger offsets, vice versa for more recent cruises (all
within a 6% range). Adjust
according to the weighted mean upward.
Posted by nlange@geomar.de on 2018-06-14 14:00:20 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 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: 0.95.
Posted by nlange@geomar.de on 2026-08-05 16:38:03 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.9299999999999999.
Posted by nlange@geomar.de on 2026-08-05 16:37:49 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for oxygen_offset from percent to factor for 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 1.09.
Posted by nlange@geomar.de on 2026-08-05 16:37:36 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for nitrate_offset from percent to factor for 58GS20130717[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 16:37:24 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 58GS20130717[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 58GS20130717[1-last] based on
silicate_offset: -5.0; inversion: 0.0; inversion_full: 0.6; preadjustment: 0;
offsets_raw: 10.8; offsets_preadj: -0.1; offsets_preadj_u: 0.8; offsets_post:
-0.5; offsets_post_u: 0.5; offsets_post_rt: 7.5; numberofxovers: 16; trends_pre:
0.8; trends_adj: 0.7.
Posted by nlange@geomar.de on 2026-08-05 14:17:33 UTC for data product: GLODAPv3
58GS20130717[1-last] GLODAPv3 release
GLODAPv3 release: silicate autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-05 14:17:33 UTC for data product: GLODAPv3
GLODAPv3 release: temperature added as NEW adjustment parameter to 58GS20130717[1-last]
Automated addition of temperature as NEW parameter to 58GS20130717[1-last] based
on temperature_offset: 0.
Posted by nlange@geomar.de on 2026-08-05 14:17:18 UTC for data product: GLODAPv3
58GS20130717[1-last] GLODAPv3 release
Automated addition of temperature as NEW adjustment parameter in GLODAPv3 to
58GS20130717[1-last] - select parameter to view annotation with specific
details.
Posted by nlange@geomar.de on 2026-08-05 14:17:18 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated tco2 update for 58GS20130717
GLODAPv3 release: tco2 update of 58GS20130717 based on tco2_offset: 0.0;
inversion: 0.0; inversion_full: -0.2; preadjustment: 0; offsets_raw: 2.4;
offsets_preadj: 0.7; offsets_preadj_u: 0.6; offsets_post: 0.4; offsets_post_u:
0.3; offsets_post_rt: 2.1; numberofxovers: 15; trends_pre: 0.2; trends_adj: 0.2.
Posted by nlange@geomar.de on 2026-08-04 17:12:19 UTC for data product: GLODAPv3
58GS20130717 GLODAPv3 release
GLODAPv3 release: tco2 autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:12:19 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated salinity update for 58GS20130717
GLODAPv3 release: salinity update of 58GS20130717 based on salinity_offset:
0.0000; inversion: -0.0068; inversion_full: -0.0055; preadjustment: 0;
offsets_raw: 0.0180; offsets_preadj: 0.0069; offsets_preadj_u: 0.0018;
offsets_post: -0.0000; offsets_post_u: 0.0016; offsets_post_rt: 0.0138;
numberofxovers: 26; trends_pre: 0.0007; trends_adj: 0.0007.
Posted by nlange@geomar.de on 2026-08-04 17:11:49 UTC for data product: GLODAPv3
58GS20130717 GLODAPv3 release
GLODAPv3 release: salinity autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:49 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 58GS20130717
GLODAPv3 release: phosphate update of 58GS20130717 based on phosphate_offset:
-7.0; inversion: -1.0; inversion_full: -0.8; preadjustment: -9; offsets_raw:
0.8; offsets_preadj: 0.7; offsets_preadj_u: 0.8; offsets_post: -0.0;
offsets_post_u: 0.4; offsets_post_rt: 0.1; numberofxovers: 20; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:34 UTC for data product: GLODAPv3
58GS20130717 GLODAPv3 release
GLODAPv3 release: phosphate autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:34 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 58GS20130717
GLODAPv3 release: oxygen update of 58GS20130717 based on oxygen_offset: 9.0;
inversion: -0.7; inversion_full: -0.6; preadjustment: 9; offsets_raw: -0.7;
offsets_preadj: 0.8; offsets_preadj_u: 0.1; offsets_post: -0.0; offsets_post_u:
0.1; offsets_post_rt: -1.5; numberofxovers: 26; trends_pre: -0.1; trends_adj:
-0.2.
Posted by nlange@geomar.de on 2026-08-04 17:11:21 UTC for data product: GLODAPv3
58GS20130717 GLODAPv3 release
GLODAPv3 release: oxygen autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:21 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 58GS20130717
GLODAPv3 release: nitrate update of 58GS20130717 based on nitrate_offset: 0.0;
inversion: 0.0; inversion_full: -1.6; preadjustment: 0; offsets_raw: 1.6;
offsets_preadj: 1.3; offsets_preadj_u: 0.5; offsets_post: 1.4; offsets_post_u:
0.3; offsets_post_rt: 1.9; numberofxovers: 24; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:07 UTC for data product: GLODAPv3
58GS20130717 GLODAPv3 release
GLODAPv3 release: nitrate autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:07 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated alkalinity update for 58GS20130717
GLODAPv3 release: alkalinity update of 58GS20130717 based on alkalinity_offset:
0.0; inversion: 0.0; inversion_full: -1.4; preadjustment: 0; offsets_raw: 1.4;
offsets_preadj: 1.4; offsets_preadj_u: 0.9; offsets_post: 1.5; offsets_post_u:
0.4; offsets_post_rt: 1.6; numberofxovers: 13; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 13:46:32 UTC for data product: GLODAPv3
58GS20130717 GLODAPv3 release
GLODAPv3 release: alkalinity autogenerated adjustment parameter update for
58GS20130717 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 13:46:32 UTC for data product: GLODAPv3
58GS20130717 - silicate
There seems to be a temporal trend towards higher concentrations until 2000. But
that trend seems to have stopped. Following the two most recent GS cruises (2006
& 2009) a 1.05 offset seems reasonable. Adjust downward accordingly.
Note that the data is very precise.
Posted by nlange@geomar.de on 2018-06-14 14:06:57 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
58GS20130717 - salinity
There is a temporal trend towards more saline water.
Still, the offset to the GS2009 cruise is very high (0.0086). Further, the
offsets are strongly depth dependant.
Need to consider a slight adjustment to put this cruise (at least) on the trend
line…
Posted by nlange@geomar.de on 2018-06-14 14:05:39 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
58GS20130717 - phosphate
Most crossovers indicate at least 10% too high values. Given the nice agreement
between the different offsets, adjust accordingly to the weighted mean downward.
Posted by nlange@geomar.de on 2018-06-14 14:02:45 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
58GS20130717 - nitrate
Crossovers older 2000 indicate slightly too high concentrations, however given
the quality of many of these crossovers those results are doubtful. Also note
that the offsets of the different rossovers show a large variability, especially
JH cruises (compare both JH1996 cruises). Further, the more recent cruises fall
into the acceptable range. Maintain.
Posted by nlange@geomar.de on 2018-06-14 14:01:44 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
58GS20130717 - oxygen
All crossvers show roughly 10% too low concentrations. Crossovers with cruises
older 1995 show rather stronger offsets, vice versa for more recent cruises (all
within a 6% range). Adjust
according to the weighted mean upward.
Posted by nlange@geomar.de on 2018-06-14 14:00:20 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
58GS20130717 - alkalinity
Analysis performed for normalized alkalinity (Frijs et al. 2003).
The data is very scattery. However, all offsets are within the limits - mostly
postive. But the uncertainty in this region remains quite large - see also the
standard deviations of the offsets. Maintain.
Posted by nlange@geomar.de on 2018-06-14 13:59:30 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
58GS20130717 - tco2
Analysis performed for normalized tco2 (Frijs et al. 2003).
There is a temporal trend towards higher concentrations. The most recent
cruises(younger 2002)show offsets within the limits. Maintain.
Posted by nlange@geomar.de on 2018-06-14 13:57:45 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
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