Cruise: 58GS20150410 (dataset:GLODAPv2.2019) Data product: GLODAPv2.2019, v2.2020, v2.2021 Successor: GLODAPv2.2022, v2.2023
Synonyms (including errata!) for this cruise: GOS2015107; 58GS20150410; alias: GOS2015107; SNACS
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)
Please wait while loading list of related files

| Filename: | Comment: | Action | |
|---|---|---|---|
| Redfield.png | View | ||

Plot/Data files re. Parameter(s) (select parameter on left side to view!):
alkalinity:7
cfc12:1
cruise:1
nitrate:11
oxygen:13
phosphate:12
salinity:15
silicate:13
tco2:11


| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MM20060523_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06MM20090714_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06MT19910902_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06MT20010717_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06MT20030626_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 316N19720718.1_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 32OC19880723_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 35TH20100608_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 64PE20000926_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 64PE20070830_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 64TR19910408_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 74DI19970807_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 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 58GS20150410
GLODAPv3 release: salinity update of 58GS20150410 based on salinity_offset:
-0.0077; inversion: -0.0077; inversion_full: -0.0074; preadjustment: 0;
offsets_raw: 0.0086; offsets_preadj: 0.0078; offsets_preadj_u: 0.0015;
offsets_post: 0.0000; offsets_post_u: 0.0014; offsets_post_rt: 0.0001;
numberofxovers: 39; trends_pre: 0.0003; trends_adj: 0.0000.
Posted by nlange@geomar.de on 2026-08-04 17:11:49 UTC for data product: GLODAPv3
58GS20150410 - salinity
There seems to be a temporal trend towards more saline waters within the last 15
years. However, the trend line is not that clear making this a tricky decision.
Due to the large uncertainty involved in this decision I cannot recommend any
adjustment...
Posted by nlange@geomar.de on 2018-06-15 09:29:50 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021



| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MM20060523_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 06MT19970707_Xover_norm .png | [autogenerated from RC_Nico/tco2!] |
View | |
| 35TH20020611_Xover_norm .png | [autogenerated from RC_Nico/tco2!] |
View | |
| 35TH20040604_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 35TH20080610_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 35TH20100608_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 64PE20000926_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 64PE20050907_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 64PE20070830_Xover_norm.png | [autogenerated from RC_Nico/tco2!] |
View | |
| 64TR19910408_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 58GS20150410
GLODAPv3 release: tco2 update of 58GS20150410 based on tco2_offset: 0.0;
inversion: 0.0; inversion_full: 1.3; preadjustment: 0; offsets_raw: 1.5;
offsets_preadj: -1.7; offsets_preadj_u: 0.6; offsets_post: -1.6; offsets_post_u:
0.3; offsets_post_rt: 1.2; numberofxovers: 17; trends_pre: 0.6; trends_adj: 0.4.
Posted by nlange@geomar.de on 2026-08-04 17:12:19 UTC for data product: GLODAPv3
58GS20150410 - tco2
The analysis is performed for normalized tco2 (Frijs et al. 2003). There is a
temporal trend visible, e.g. TH2002 - TH2010. Mean weighted offset thus not
relevant. In respect to the trend line data seems to be too low. However given
the uncertainties of the trend line - maintain.
Posted by nlange@geomar.de on 2018-06-15 09:15:09 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021

| Filename: | Comment: | Action | |
|---|---|---|---|
| 35TH20020611_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 35TH20040604_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 35TH20080610_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 35TH20100608_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 64PE20050907_Xover_norm.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 64PE20070830_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 58GS20150410
GLODAPv3 release: alkalinity update of 58GS20150410 based on alkalinity_offset:
0.0; inversion: 0.0; inversion_full: -1.1; preadjustment: 0; offsets_raw: 1.5;
offsets_preadj: 1.5; offsets_preadj_u: 0.9; offsets_post: 1.2; offsets_post_u:
0.6; offsets_post_rt: 1.3; numberofxovers: 24; 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
58GS20150410 - alkalinity
The analysis is performed for normalized alkalinity (Frijs et al. 2003). All
offsets are clearly within the acceptable range, also reflected in the weighetd
mean of 0.84. Note that the analysis is based on few samples. Maintain.
Posted by nlange@geomar.de on 2018-06-15 09:17:22 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021


View comment(s) (filtered by ph in subject)
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.879.
Posted by nlange@geomar.de on 2026-08-05 16:37:49 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 58GS20150410
GLODAPv3 release: phosphate update of 58GS20150410 based on phosphate_offset:
-12.1; inversion: -0.1; inversion_full: -0.1; preadjustment: -12; offsets_raw:
0.6; offsets_preadj: 0.5; offsets_preadj_u: 0.5; offsets_post: -0.0;
offsets_post_u: 0.7; offsets_post_rt: 0.0; numberofxovers: 16; 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
58GS20150410 - phosphate
All crossovers show at least a 8% offset - clearly indicating too high
concentrations. Note the strong agreement between all crossovers. There is only
one offset below 1.1. Further, the Redfield-Ratio also indicates too high
phosphate values supporting the crossover result. Adjust downward following the
weighted mean offset of 1.13.
Posted by nlange@geomar.de on 2018-06-15 09:26:02 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021



| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MM20060523_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 06MT19910902_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 06MT19970707_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 06MT20010717_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 35TH20100608_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 64PE20050907_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 64PE20070830_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 64TR19900701_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 64TR19910408_Xover_press.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 74DI20080820_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 58GS20150410[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 58GS20150410
GLODAPv3 release: nitrate update of 58GS20150410 based on nitrate_offset: 0.0;
inversion: 0.0; inversion_full: -0.5; preadjustment: 0; offsets_raw: -0.4;
offsets_preadj: 0.2; offsets_preadj_u: 0.4; offsets_post: 0.3; offsets_post_u:
0.4; offsets_post_rt: -0.1; numberofxovers: 21; trends_pre: -0.1; trends_adj:
-0.1.
Posted by nlange@geomar.de on 2026-08-04 17:11:07 UTC for data product: GLODAPv3
58GS20150410 - nitrate
Most crossover offsets are within the acceptable range, (more or less) centered
around 1. Note that the deepest measurement might downgrade the quality of some
crossovers, e.g. 06MT1997.
Posted by nlange@geomar.de on 2018-06-15 09:21:04 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MM20060523_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 06MT19941115_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 06MT19970815_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 35TH20020611_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 35TH20080610_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 35TH20100608_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 64PE20000926_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 64PE20050907_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 64PE20070830_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 64TR19900701_Xover_press.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 64TR19910408_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 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.879.
Posted by nlange@geomar.de on 2026-08-05 16:37:49 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 58GS20150410
GLODAPv3 release: phosphate update of 58GS20150410 based on phosphate_offset:
-12.1; inversion: -0.1; inversion_full: -0.1; preadjustment: -12; offsets_raw:
0.6; offsets_preadj: 0.5; offsets_preadj_u: 0.5; offsets_post: -0.0;
offsets_post_u: 0.7; offsets_post_rt: 0.0; numberofxovers: 16; 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
58GS20150410 - phosphate
All crossovers show at least a 8% offset - clearly indicating too high
concentrations. Note the strong agreement between all crossovers. There is only
one offset below 1.1. Further, the Redfield-Ratio also indicates too high
phosphate values supporting the crossover result. Adjust downward following the
weighted mean offset of 1.13.
Posted by nlange@geomar.de on 2018-06-15 09:26:02 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MM20060523_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 06MT19941115_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 06MT19970707_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 06MT20010717_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 316N19810401_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 35TH20080610_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 35TH20100608_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 64PE20050907_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 64TR19900701_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 64TR19910408_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 74DI19970807_Xover_press.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 74DI20080820_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 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: 0.9339999999999999.
Posted by nlange@geomar.de on 2026-08-05 16:38:03 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 58GS20150410[1-last] based on
silicate_offset: -6.6; inversion: -6.6; inversion_full: -6.8; preadjustment: 0;
offsets_raw: 7.0; offsets_preadj: 6.9; offsets_preadj_u: 2.1; offsets_post: 0.0;
offsets_post_u: 1.9; offsets_post_rt: 0.2; numberofxovers: 13; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-05 14:17:33 UTC for data product: GLODAPv3
58GS20150410 - silicate
This is a difficult analysis due to the large variability between the different
offsets and their large uncertainties. Also the analysis depends onvery few
data. Note that crossovers in front of Iceland only show strong negative
offsets. Thus, even though the weighted mean offset is 1.04, maintain.
Posted by nlange@geomar.de on 2018-06-15 09:32:02 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MM20060523_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06MM20090714_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06MT19970815_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06MT20010717_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 316N19970530_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 35TH20040604_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 35TH20080610_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 35TH20100608_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 64PE20070830_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 64TR19900701_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 74DI19970807_Xover_press.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 74DI20080820_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 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 0.993.
Posted by nlange@geomar.de on 2026-08-05 16:37:36 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 58GS20150410
GLODAPv3 release: oxygen update of 58GS20150410 based on oxygen_offset: -0.7;
inversion: -0.7; inversion_full: -0.7; preadjustment: 0; offsets_raw: 0.6;
offsets_preadj: 0.6; offsets_preadj_u: 0.2; offsets_post: -0.0; offsets_post_u:
0.2; offsets_post_rt: 0.0; numberofxovers: 33; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:21 UTC for data product: GLODAPv3
58GS20150410 - oxygen
There is a large variability of offsets between the different crossovers.
However, most offsets are within the acceptable range. Maintain.
Posted by nlange@geomar.de on 2018-06-15 09:18:40 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021



View comment(s) (filtered by cfc12 in subject)
58GS20150410 - cfc12
The later stations show a clear oversaturation of about 20% - seems too high if
compared to other 75N lines. E.g. compare against 06AQ20120614 (overstauration
barely 10%).
The great variability of the different stations (ranging from a saturation ratio
of 0.88 to over 1.4) question the overall quality of the data strongly...
Posted by nlange@geomar.de on 2018-06-15 09:33:35 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021










View 28 comment(s) (Lists all comments)
GLODAPv3 release: converted value for silicate_offset from percent to factor for 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: 0.9339999999999999.
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 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 0.879.
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 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for oxygen_offset from percent
to factor: 0.993.
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 58GS20150410[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 58GS20150410[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 58GS20150410[1-last] based on
silicate_offset: -6.6; inversion: -6.6; inversion_full: -6.8; preadjustment: 0;
offsets_raw: 7.0; offsets_preadj: 6.9; offsets_preadj_u: 2.1; offsets_post: 0.0;
offsets_post_u: 1.9; offsets_post_rt: 0.2; numberofxovers: 13; trends_pre: 0.0;
trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-05 14:17:33 UTC for data product: GLODAPv3
58GS20150410[1-last] GLODAPv3 release
GLODAPv3 release: silicate autogenerated adjustment parameter update for
58GS20150410 - 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 58GS20150410[1-last]
Automated addition of temperature as NEW parameter to 58GS20150410[1-last] based
on temperature_offset: 0.
Posted by nlange@geomar.de on 2026-08-05 14:17:18 UTC for data product: GLODAPv3
58GS20150410[1-last] GLODAPv3 release
Automated addition of temperature as NEW adjustment parameter in GLODAPv3 to
58GS20150410[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 58GS20150410
GLODAPv3 release: tco2 update of 58GS20150410 based on tco2_offset: 0.0;
inversion: 0.0; inversion_full: 1.3; preadjustment: 0; offsets_raw: 1.5;
offsets_preadj: -1.7; offsets_preadj_u: 0.6; offsets_post: -1.6; offsets_post_u:
0.3; offsets_post_rt: 1.2; numberofxovers: 17; trends_pre: 0.6; trends_adj: 0.4.
Posted by nlange@geomar.de on 2026-08-04 17:12:19 UTC for data product: GLODAPv3
58GS20150410 GLODAPv3 release
GLODAPv3 release: tco2 autogenerated adjustment parameter update for
58GS20150410 - 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 58GS20150410
GLODAPv3 release: salinity update of 58GS20150410 based on salinity_offset:
-0.0077; inversion: -0.0077; inversion_full: -0.0074; preadjustment: 0;
offsets_raw: 0.0086; offsets_preadj: 0.0078; offsets_preadj_u: 0.0015;
offsets_post: 0.0000; offsets_post_u: 0.0014; offsets_post_rt: 0.0001;
numberofxovers: 39; trends_pre: 0.0003; trends_adj: 0.0000.
Posted by nlange@geomar.de on 2026-08-04 17:11:49 UTC for data product: GLODAPv3
58GS20150410 GLODAPv3 release
GLODAPv3 release: salinity autogenerated adjustment parameter update for
58GS20150410 - 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 58GS20150410
GLODAPv3 release: phosphate update of 58GS20150410 based on phosphate_offset:
-12.1; inversion: -0.1; inversion_full: -0.1; preadjustment: -12; offsets_raw:
0.6; offsets_preadj: 0.5; offsets_preadj_u: 0.5; offsets_post: -0.0;
offsets_post_u: 0.7; offsets_post_rt: 0.0; numberofxovers: 16; 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
58GS20150410 GLODAPv3 release
GLODAPv3 release: phosphate autogenerated adjustment parameter update for
58GS20150410 - 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 58GS20150410
GLODAPv3 release: oxygen update of 58GS20150410 based on oxygen_offset: -0.7;
inversion: -0.7; inversion_full: -0.7; preadjustment: 0; offsets_raw: 0.6;
offsets_preadj: 0.6; offsets_preadj_u: 0.2; offsets_post: -0.0; offsets_post_u:
0.2; offsets_post_rt: 0.0; numberofxovers: 33; trends_pre: 0.0; trends_adj: 0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:21 UTC for data product: GLODAPv3
58GS20150410 GLODAPv3 release
GLODAPv3 release: oxygen autogenerated adjustment parameter update for
58GS20150410 - 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 58GS20150410
GLODAPv3 release: nitrate update of 58GS20150410 based on nitrate_offset: 0.0;
inversion: 0.0; inversion_full: -0.5; preadjustment: 0; offsets_raw: -0.4;
offsets_preadj: 0.2; offsets_preadj_u: 0.4; offsets_post: 0.3; offsets_post_u:
0.4; offsets_post_rt: -0.1; numberofxovers: 21; trends_pre: -0.1; trends_adj:
-0.1.
Posted by nlange@geomar.de on 2026-08-04 17:11:07 UTC for data product: GLODAPv3
58GS20150410 GLODAPv3 release
GLODAPv3 release: nitrate autogenerated adjustment parameter update for
58GS20150410 - 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 58GS20150410
GLODAPv3 release: alkalinity update of 58GS20150410 based on alkalinity_offset:
0.0; inversion: 0.0; inversion_full: -1.1; preadjustment: 0; offsets_raw: 1.5;
offsets_preadj: 1.5; offsets_preadj_u: 0.9; offsets_post: 1.2; offsets_post_u:
0.6; offsets_post_rt: 1.3; numberofxovers: 24; 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
58GS20150410 GLODAPv3 release
GLODAPv3 release: alkalinity autogenerated adjustment parameter update for
58GS20150410 - 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
58GS20150410 - cfc12
The later stations show a clear oversaturation of about 20% - seems too high if
compared to other 75N lines. E.g. compare against 06AQ20120614 (overstauration
barely 10%).
The great variability of the different stations (ranging from a saturation ratio
of 0.88 to over 1.4) question the overall quality of the data strongly...
Posted by nlange@geomar.de on 2018-06-15 09:33:35 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - silicate
This is a difficult analysis due to the large variability between the different
offsets and their large uncertainties. Also the analysis depends onvery few
data. Note that crossovers in front of Iceland only show strong negative
offsets. Thus, even though the weighted mean offset is 1.04, maintain.
Posted by nlange@geomar.de on 2018-06-15 09:32:02 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - salinity
There seems to be a temporal trend towards more saline waters within the last 15
years. However, the trend line is not that clear making this a tricky decision.
Due to the large uncertainty involved in this decision I cannot recommend any
adjustment...
Posted by nlange@geomar.de on 2018-06-15 09:29:50 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - phosphate
All crossovers show at least a 8% offset - clearly indicating too high
concentrations. Note the strong agreement between all crossovers. There is only
one offset below 1.1. Further, the Redfield-Ratio also indicates too high
phosphate values supporting the crossover result. Adjust downward following the
weighted mean offset of 1.13.
Posted by nlange@geomar.de on 2018-06-15 09:26:02 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - nitrate
Most crossover offsets are within the acceptable range, (more or less) centered
around 1. Note that the deepest measurement might downgrade the quality of some
crossovers, e.g. 06MT1997.
Posted by nlange@geomar.de on 2018-06-15 09:21:04 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - oxygen
There is a large variability of offsets between the different crossovers.
However, most offsets are within the acceptable range. Maintain.
Posted by nlange@geomar.de on 2018-06-15 09:18:40 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - alkalinity
The analysis is performed for normalized alkalinity (Frijs et al. 2003). All
offsets are clearly within the acceptable range, also reflected in the weighetd
mean of 0.84. Note that the analysis is based on few samples. Maintain.
Posted by nlange@geomar.de on 2018-06-15 09:17:22 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
58GS20150410 - tco2
The analysis is performed for normalized tco2 (Frijs et al. 2003). There is a
temporal trend visible, e.g. TH2002 - TH2010. Mean weighted offset thus not
relevant. In respect to the trend line data seems to be too low. However given
the uncertainties of the trend line - maintain.
Posted by nlange@geomar.de on 2018-06-15 09:15:09 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021
Hide comments