Cruise: 29AH20110128 (dataset:GLODAPv2.2019) Data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023 Successor: GLODAPv3
Synonyms (including errata!) for this cruise: 24N_Malaspina; 29AH20110128; alias: Malaspina; 24N_Malaspina
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:11
cruise:1
nitrate:10
oxygen:12
ph:13
phosphate:9
salinity:12
silicate:13


| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MT19970107_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 06MT20040311_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 29HE20130320_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 316N19970717_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 32OC19880723_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33AT20120324_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33MW19930704.1_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/salinity!] |
View | |
| 74DI20100106_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 29AH20110128
GLODAPv3 release: salinity update of 29AH20110128 based on salinity_offset:
0.0000; inversion: 0.0000; inversion_full: -0.0002; preadjustment: 0;
offsets_raw: 0.0000; offsets_preadj: 0.0003; offsets_preadj_u: 0.0010;
offsets_post: 0.0004; offsets_post_u: 0.0009; offsets_post_rt: 0.0001;
numberofxovers: 31; trends_pre: -0.0001; trends_adj: 0.0000.
Posted by nlange@geomar.de on 2026-08-04 17:11:40 UTC for data product: GLODAPv3
29AH20110128 - salinity
All offsets are within the acceptable range, except MT1997 (bad crossover). All
in all the data shows good accuracy. No need for an adjustment.
Posted by nlange@geomar.de on 2018-05-25 10:53:49 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 29AH20110128
GLODAPv3 release: tco2 update of 29AH20110128 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 17:12:10 UTC for data product: GLODAPv3

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MT20040311_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 316N19970815_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 33AT20120324_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 33AT20120419_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 33MW19930704.1_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 74DI19980423_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| 74DI20100106_Xover.png | [autogenerated from RC_Nico/alkalinity!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/alkalinity!] |
View | |

View comment(s) (filtered by alkalinity in subject)
GLODAPv3 release: autogenerated alkalinity update for 29AH20110128
GLODAPv3 release: alkalinity update of 29AH20110128 based on alkalinity_offset:
0.0; inversion: 0.0; inversion_full: -0.7; preadjustment: 0; offsets_raw: 1.4;
offsets_preadj: 2.0; offsets_preadj_u: 0.5; offsets_post: 1.2; offsets_post_u:
0.5; offsets_post_rt: 0.5; numberofxovers: 23; trends_pre: -0.1; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 13:46:24 UTC for data product: GLODAPv3
29AH20110128 - alkalinity
All but one offset located within the acceptable range.
33MW1993 has itself doubtful alk data... Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:49:25 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MT20040311_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 29HE20130320_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 316N19821201_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 316N19970815_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 33AT20120324_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 33AT20120419_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 33MW19930704.1_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 74DI19980423_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| 74DI20100106_Xover.png | [autogenerated from RC_Nico/ph!] |
View | |
| Xresults.png | [autogenerated from RC_Nico/ph!] |
View | |

View comment(s) (filtered by ph in subject)
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:41 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 29AH20110128
GLODAPv3 release: phosphate update of 29AH20110128 based on phosphate_offset:
0.0; inversion: 0.0; inversion_full: 0.9; preadjustment: 0; offsets_raw: -0.9;
offsets_preadj: -1.0; offsets_preadj_u: 0.5; offsets_post: -1.1; offsets_post_u:
0.4; offsets_post_rt: -0.9; numberofxovers: 19; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:26 UTC for data product: GLODAPv3
29AH20110128 - ph
The pH measurements was done using the mcp of sigma and the Clayton&Byrne'93
recipe. We does not add the delValls & Dickson (1998) correction of 0.0047.
Our previous crossover also confirm a slight low pH.
Thus, I agree to add at least the 0.0047 DelVall correction or directly the
0.0075 proposed by Nico
Posted by fiz.perez@iim.csic.es on 2018-09-24 17:26:34 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - ph
All but one - of doubtful quality - crossover (316N1981) have negative offsets.
Even though 316N1997 shows a much stronger offset than other cruises I would not
disregard it. Hence, the crossover results seem reliable. Following the weighted
mean of -0.0075 an additional inter consistency check has been performed (type
3). The calculated tco2 offset was reduced from 5.57 (no pH adjustment) to 2.40
(pH + 0.0075). All in all I would suggest an adjustment upward of 0.0075.
Posted by nlange@geomar.de on 2018-07-27 09:28:49 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - phosphate
All offsets within acceptable range, indicating slightly too low (<1%)
concentrations. Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:52:23 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023



| Filename: | Comment: | Action | |
|---|---|---|---|
| 29HE19920714_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 29HE20130320_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 316N19810401_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 32OC19880723_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 33MW19930704.1_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/nitrate!] |
View | |
| 74DI20100106_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 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for nitrate_offset from percent
to factor: 1.067.
Posted by nlange@geomar.de on 2026-08-05 16:37:17 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 29AH20110128
GLODAPv3 release: nitrate update of 29AH20110128 based on nitrate_offset: 6.7;
inversion: 0.7; inversion_full: 0.7; preadjustment: 6; offsets_raw: -0.9;
offsets_preadj: -0.9; offsets_preadj_u: 0.5; offsets_post: -0.0; offsets_post_u:
0.4; offsets_post_rt: -0.0; numberofxovers: 22; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:00 UTC for data product: GLODAPv3
29AH20110128 - nitrate
All but one offset indicate too low nitrate concentrations.
Also, in total only three crossovers show acceptable offsets. With the suggested
adjustment concentartions are very close to 33AT2012 which seem fine. Adjust 5%
upward.
Posted by nlange@geomar.de on 2018-05-25 10:52:04 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MT19970107_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 29HE20030408_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 316N19810401_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 32OC19830501_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 33AT20120419_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/phosphate!] |
View | |
| 74DI20100106_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 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:41 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 29AH20110128
GLODAPv3 release: phosphate update of 29AH20110128 based on phosphate_offset:
0.0; inversion: 0.0; inversion_full: 0.9; preadjustment: 0; offsets_raw: -0.9;
offsets_preadj: -1.0; offsets_preadj_u: 0.5; offsets_post: -1.1; offsets_post_u:
0.4; offsets_post_rt: -0.9; numberofxovers: 19; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:26 UTC for data product: GLODAPv3
29AH20110128 - phosphate
All offsets within acceptable range, indicating slightly too low (<1%)
concentrations. Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:52:23 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MT19970107_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 29HE19920714_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 29HE20130320_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 316N19970717_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 32OC19830501_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 32OC19880723_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 33MW19930704.1_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 74DI20040404_Xover.png | [autogenerated from RC_Nico/silicate!] |
View | |
| 74DI20100106_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 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: -777.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:54 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 29AH20110128[1-last] based on
silicate_offset: -777.0; 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 14:17:24 UTC for data product: GLODAPv3
29AH20110128 - silicate
In december '2019, I had contact with Francisco Dominguez that he did the
nutrient analysis during the cruise, in order to check the calibration curves of
silicate becasue they are ussually non-linear and some people do not take this
into account.
He said me that he did not have the file data to work in it. Thus, it is
impossible to go backward and try to recalibrate de silicate numbers.
Posted by fiz.perez@iim.csic.es on 2019-02-08 11:58:33 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - silicate
There seems to be an issue with offset based vs concentration, i.e. high offset
at low concentration. Flag the data (that are high precision) to the PI for
recalibration
Posted by ttanhua@geomar.de on 2018-09-26 18:54:31 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - silicate
There are several trustworthy offsets above the max limit, e.g. 33RO2003. But
there are also several below the min. limit, such as 316N1997/2003.
Excluding 06MT1997 (due to bad locations of the crossover stations), the
weighted mean offset still is 1.0197. Nonetheless, this is within the range,
thus no adjustment.
Posted by nlange@geomar.de on 2018-05-25 10:57:06 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023

| Filename: | Comment: | Action | |
|---|---|---|---|
| 06MT19970107_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 06MT20050813_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 29HE20130320_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 316N20030922_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 32OC19880723_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33AT20120324_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33AT20120419_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33MW19930704.1_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33RO19980123_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 33RO20030604_Xover.png | [autogenerated from RC_Nico/oxygen!] |
View | |
| 74DI20100106_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 29AH20110128[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 16:37:28 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 29AH20110128
GLODAPv3 release: oxygen update of 29AH20110128 based on oxygen_offset: 0.0;
inversion: 0.0; inversion_full: 0.1; preadjustment: 0; offsets_raw: -0.1;
offsets_preadj: 0.0; offsets_preadj_u: 0.3; offsets_post: -0.1; offsets_post_u:
0.2; offsets_post_rt: -0.2; numberofxovers: 31; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:12 UTC for data product: GLODAPv3
29AH20110128 - oxygen
One outlier (06MT1997) present with crossover stations being quite far away.
Also these stations are located near an upwelling region and near Islands. The
other crossovers show acceptable offsets. Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:50:41 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023














View 30 comment(s) (Lists all comments)
GLODAPv3 release: converted value for silicate_offset from percent to factor for 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for silicate_offset from percent
to factor: -777.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:54 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for phosphate_offset from percent to factor for 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for phosphate_offset from
percent to factor: 1.0.
Posted by nlange@geomar.de on 2026-08-05 16:37:41 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for oxygen_offset from percent to factor for 29AH20110128[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 16:37:28 UTC for data product: GLODAPv3
GLODAPv3 release: converted value for nitrate_offset from percent to factor for 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - converted value for nitrate_offset from percent
to factor: 1.067.
Posted by nlange@geomar.de on 2026-08-05 16:37:17 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated silicate update for 29AH20110128[1-last]
GLODAPv3 release: CORRIGENDUM - silicate update of 29AH20110128[1-last] based on
silicate_offset: -777.0; 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 14:17:24 UTC for data product: GLODAPv3
29AH20110128[1-last] GLODAPv3 release
GLODAPv3 release: silicate autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-05 14:17:24 UTC for data product: GLODAPv3
GLODAPv3 release: temperature added as NEW adjustment parameter to 29AH20110128[1-last]
Automated addition of temperature as NEW parameter to 29AH20110128[1-last] based
on temperature_offset: 0.
Posted by nlange@geomar.de on 2026-08-05 14:17:11 UTC for data product: GLODAPv3
29AH20110128[1-last] GLODAPv3 release
Automated addition of temperature as NEW adjustment parameter in GLODAPv3 to
29AH20110128[1-last] - select parameter to view annotation with specific
details.
Posted by nlange@geomar.de on 2026-08-05 14:17:11 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated tco2 update for 29AH20110128
GLODAPv3 release: tco2 update of 29AH20110128 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 17:12:10 UTC for data product: GLODAPv3
29AH20110128 GLODAPv3 release
GLODAPv3 release: tco2 autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:12:10 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated salinity update for 29AH20110128
GLODAPv3 release: salinity update of 29AH20110128 based on salinity_offset:
0.0000; inversion: 0.0000; inversion_full: -0.0002; preadjustment: 0;
offsets_raw: 0.0000; offsets_preadj: 0.0003; offsets_preadj_u: 0.0010;
offsets_post: 0.0004; offsets_post_u: 0.0009; offsets_post_rt: 0.0001;
numberofxovers: 31; trends_pre: -0.0001; trends_adj: 0.0000.
Posted by nlange@geomar.de on 2026-08-04 17:11:40 UTC for data product: GLODAPv3
29AH20110128 GLODAPv3 release
GLODAPv3 release: salinity autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:40 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated phosphate update for 29AH20110128
GLODAPv3 release: phosphate update of 29AH20110128 based on phosphate_offset:
0.0; inversion: 0.0; inversion_full: 0.9; preadjustment: 0; offsets_raw: -0.9;
offsets_preadj: -1.0; offsets_preadj_u: 0.5; offsets_post: -1.1; offsets_post_u:
0.4; offsets_post_rt: -0.9; numberofxovers: 19; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:26 UTC for data product: GLODAPv3
29AH20110128 GLODAPv3 release
GLODAPv3 release: phosphate autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:26 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated oxygen update for 29AH20110128
GLODAPv3 release: oxygen update of 29AH20110128 based on oxygen_offset: 0.0;
inversion: 0.0; inversion_full: 0.1; preadjustment: 0; offsets_raw: -0.1;
offsets_preadj: 0.0; offsets_preadj_u: 0.3; offsets_post: -0.1; offsets_post_u:
0.2; offsets_post_rt: -0.2; numberofxovers: 31; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:12 UTC for data product: GLODAPv3
29AH20110128 GLODAPv3 release
GLODAPv3 release: oxygen autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:12 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated nitrate update for 29AH20110128
GLODAPv3 release: nitrate update of 29AH20110128 based on nitrate_offset: 6.7;
inversion: 0.7; inversion_full: 0.7; preadjustment: 6; offsets_raw: -0.9;
offsets_preadj: -0.9; offsets_preadj_u: 0.5; offsets_post: -0.0; offsets_post_u:
0.4; offsets_post_rt: -0.0; numberofxovers: 22; trends_pre: 0.0; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 17:11:00 UTC for data product: GLODAPv3
29AH20110128 GLODAPv3 release
GLODAPv3 release: nitrate autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 17:11:00 UTC for data product: GLODAPv3
GLODAPv3 release: autogenerated alkalinity update for 29AH20110128
GLODAPv3 release: alkalinity update of 29AH20110128 based on alkalinity_offset:
0.0; inversion: 0.0; inversion_full: -0.7; preadjustment: 0; offsets_raw: 1.4;
offsets_preadj: 2.0; offsets_preadj_u: 0.5; offsets_post: 1.2; offsets_post_u:
0.5; offsets_post_rt: 0.5; numberofxovers: 23; trends_pre: -0.1; trends_adj:
0.0.
Posted by nlange@geomar.de on 2026-08-04 13:46:24 UTC for data product: GLODAPv3
29AH20110128 GLODAPv3 release
GLODAPv3 release: alkalinity autogenerated adjustment parameter update for
29AH20110128 - select parameter to view annotation with specific details.
Posted by nlange@geomar.de on 2026-08-04 13:46:24 UTC for data product: GLODAPv3
29AH20110128 - silicate
In december '2019, I had contact with Francisco Dominguez that he did the
nutrient analysis during the cruise, in order to check the calibration curves of
silicate becasue they are ussually non-linear and some people do not take this
into account.
He said me that he did not have the file data to work in it. Thus, it is
impossible to go backward and try to recalibrate de silicate numbers.
Posted by fiz.perez@iim.csic.es on 2019-02-08 11:58:33 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - silicate
There seems to be an issue with offset based vs concentration, i.e. high offset
at low concentration. Flag the data (that are high precision) to the PI for
recalibration
Posted by ttanhua@geomar.de on 2018-09-26 18:54:31 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - ph
The pH measurements was done using the mcp of sigma and the Clayton&Byrne'93
recipe. We does not add the delValls & Dickson (1998) correction of 0.0047.
Our previous crossover also confirm a slight low pH.
Thus, I agree to add at least the 0.0047 DelVall correction or directly the
0.0075 proposed by Nico
Posted by fiz.perez@iim.csic.es on 2018-09-24 17:26:34 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - ph
All but one - of doubtful quality - crossover (316N1981) have negative offsets.
Even though 316N1997 shows a much stronger offset than other cruises I would not
disregard it. Hence, the crossover results seem reliable. Following the weighted
mean of -0.0075 an additional inter consistency check has been performed (type
3). The calculated tco2 offset was reduced from 5.57 (no pH adjustment) to 2.40
(pH + 0.0075). All in all I would suggest an adjustment upward of 0.0075.
Posted by nlange@geomar.de on 2018-07-27 09:28:49 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - silicate
There are several trustworthy offsets above the max limit, e.g. 33RO2003. But
there are also several below the min. limit, such as 316N1997/2003.
Excluding 06MT1997 (due to bad locations of the crossover stations), the
weighted mean offset still is 1.0197. Nonetheless, this is within the range,
thus no adjustment.
Posted by nlange@geomar.de on 2018-05-25 10:57:06 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - salinity
All offsets are within the acceptable range, except MT1997 (bad crossover). All
in all the data shows good accuracy. No need for an adjustment.
Posted by nlange@geomar.de on 2018-05-25 10:53:49 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - phosphate
All offsets within acceptable range, indicating slightly too low (<1%)
concentrations. Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:52:23 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - nitrate
All but one offset indicate too low nitrate concentrations.
Also, in total only three crossovers show acceptable offsets. With the suggested
adjustment concentartions are very close to 33AT2012 which seem fine. Adjust 5%
upward.
Posted by nlange@geomar.de on 2018-05-25 10:52:04 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - oxygen
One outlier (06MT1997) present with crossover stations being quite far away.
Also these stations are located near an upwelling region and near Islands. The
other crossovers show acceptable offsets. Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:50:41 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
29AH20110128 - alkalinity
All but one offset located within the acceptable range.
33MW1993 has itself doubtful alk data... Maintain.
Posted by nlange@geomar.de on 2018-05-25 10:49:25 UTC for data product: GLODAPv2.2019, v2.2020, v2.2021, v2.2022, v2.2023
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