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  "alternate_identifier": "Data MetalGate 64PE474",
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  "alternate_identifier": "Data MetalGate 64PE474",
            
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  "author": "Rob Middag (Royal Netherlands Institute for Sea 
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  "author": "Rob Middag (Royal Netherlands Institute for Sea 
            
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Research)",
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Research)",
            
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  "author_email": "rob.middag@nioz.nl",
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  "author_email": "rob.middag@nioz.nl",
            
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  "code": "7b.b.ck",
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  "code": "7b.b.ck",
            
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  "contributor": "Royal Netherlands Institute for Sea Research 
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  "contributor": "Royal Netherlands Institute for Sea Research 
            
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(NIOZ)",
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(NIOZ)",
            
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  "creator_user_id": "334efdb2-de58-453b-bdc7-c35ca8fa561f",
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  "creator_user_id": "334efdb2-de58-453b-bdc7-c35ca8fa561f",
            
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  "creators": 
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  "creators": 
            
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":\"Middag\",\"orcid\":\"0000-0002-3326-530X\",\"affiliation\":\"Royal 
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":\"Middag\",\"orcid\":\"0000-0002-3326-530X\",\"affiliation\":\"Royal 
            
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Netherlands Institute for Sea 
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Netherlands Institute for Sea 
            
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rue,\"contactemailaddress\":\"rob.middag@nioz.nl\",\"formatted\":\"Rob 
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rue,\"contactemailaddress\":\"rob.middag@nioz.nl\",\"formatted\":\"Rob 
            
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Middag - Royal Netherlands Institute for Sea Research - ORCID: 
14
Middag - Royal Netherlands Institute for Sea Research - ORCID: 
            
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0000-0002-3326-530X - Corresponding Author - 
15
0000-0002-3326-530X - Corresponding Author - 
            
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rob.middag@nioz.nl\"},{\"firstname\":\"Erin M.\",\"lastname\":\" 
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rob.middag@nioz.nl\"},{\"firstname\":\"Erin M.\",\"lastname\":\" 
            
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rtrand\",\"orcid\":\"0000-0002-5950-6810\",\"affiliation\":\"Dalhousie 
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rtrand\",\"orcid\":\"0000-0002-5950-6810\",\"affiliation\":\"Dalhousie 
            
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pondingauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Erin 
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pondingauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Erin 
            
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M.  Bertrand - Dalhousie University - ORCID: 
19
M.  Bertrand - Dalhousie University - ORCID: 
            
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0000-0002-5950-6810\"},{\"firstname\":\"Willem\",\"lastname\":\"van de 
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0000-0002-5950-6810\"},{\"firstname\":\"Willem\",\"lastname\":\"van de 
            
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Poll\",\"orcid\":\"0000-0003-4095-4338\",\"affiliation\":\"University 
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Poll\",\"orcid\":\"0000-0003-4095-4338\",\"affiliation\":\"University 
            
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of 
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of 
            
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ndingauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Willem 
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ndingauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Willem 
            
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van de Poll - University of Groningen - ORCID: 
24
van de Poll - University of Groningen - ORCID: 
            
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0000-0003-4095-4338\"},{\"firstname\":\"Rebecca 
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0000-0003-4095-4338\"},{\"firstname\":\"Rebecca 
            
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name\":\"Zitoun\",\"orcid\":\"0001-5539-7701\",\"affiliation\":\"Royal 
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name\":\"Zitoun\",\"orcid\":\"0001-5539-7701\",\"affiliation\":\"Royal 
            
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Netherlands Institute for Sea 
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Netherlands Institute for Sea 
            
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dingauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Rebecca  
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dingauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Rebecca  
            
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Zitoun - Royal Netherlands Institute for Sea Research - ORCID: 
29
Zitoun - Royal Netherlands Institute for Sea Research - ORCID: 
            
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0001-5539-7701\"},{\"firstname\":\"Wen-Hsuan 
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0001-5539-7701\"},{\"firstname\":\"Wen-Hsuan 
            
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:\"Liao\",\"orcid\":\"0000-0002-3687-3423\",\"affiliation\":\"National 
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:\"Liao\",\"orcid\":\"0000-0002-3687-3423\",\"affiliation\":\"National 
            
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Cheng Kung 
32
Cheng Kung 
            
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ngauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Wen-Hsuan  
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ngauthor\":null,\"contactemailaddress\":null,\"formatted\":\"Wen-Hsuan  
            
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Liao - National Cheng Kung University - ORCID: 
34
Liao - National Cheng Kung University - ORCID: 
            
35
0000-0002-3687-3423\"},{\"firstname\":\" Loay J. 
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0000-0002-3687-3423\"},{\"firstname\":\" Loay J. 
            
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tname\":\"Jabre\",\"orcid\":\"0000-0003-3177-6824\",\"affiliation\":\" 
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tname\":\"Jabre\",\"orcid\":\"0000-0003-3177-6824\",\"affiliation\":\" 
            
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* Present Address: Department of Biology, 
37
* Present Address: Department of Biology, 
            
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rrespondingauthor\":null,\"contactemailaddress\":null,\"formatted\":\" 
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rrespondingauthor\":null,\"contactemailaddress\":null,\"formatted\":\" 
            
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Loay J.  Jabre -  * Present Address: Department of Biology,  - ORCID: 
39
Loay J.  Jabre -  * Present Address: Department of Biology,  - ORCID: 
            
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0000-0003-3177-6824\"}]",
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0000-0003-3177-6824\"}]",
            
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  "deposit_date": "2025-12-17",
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  "deposit_date": "2025-12-17",
            
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  "depositor": "Rob Middag (rob.middag@nioz.nl)",
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  "depositor": "Rob Middag (rob.middag@nioz.nl)",
            
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  "distribution_date": "2025-12-17",
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  "distribution_date": "2025-12-17",
            
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  "distributor": "Research Data Management(NIOZ Royal Netherlands 
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  "distributor": "Research Data Management(NIOZ Royal Netherlands 
            
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Institute for Sea Research)",
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Institute for Sea Research)",
            
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  "doi_date_published": "2025-12-17T11:50:24.2007709",
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  "doi_date_published": "2025-12-17T11:50:24",
            
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  "funding_references": 
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  "funding_references": 
            
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\":\"NWO\",\"awardnumber\":\"016.Vidi.189.138\",\"awardtitle\":\"Trace 
49
\":\"NWO\",\"awardnumber\":\"016.Vidi.189.138\",\"awardtitle\":\"Trace 
            
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metals and the Arctic-Atlantic gateway in a changing world, local 
50
metals and the Arctic-Atlantic gateway in a changing world, local 
            
51
processes and global connections\",\"formatted\":\"NWO - 
51
processes and global connections\",\"formatted\":\"NWO - 
            
52
016.Vidi.189.138 - Trace metals and the Arctic-Atlantic gateway in a 
52
016.Vidi.189.138 - Trace metals and the Arctic-Atlantic gateway in a 
            
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changing world, local processes and global connections\"}]",
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changing world, local processes and global connections\"}]",
            
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  "geographic_coverage": "[{\"place\":\"Around 
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  "geographic_coverage": "[{\"place\":\"Around 
            
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\",\"longitude_2\":\"45\",\"longitude_1\":\"0\",\"formatted\":\"Around 
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",\"longitude_2\":\"-45\",\"longitude_1\":\"0\",\"formatted\":\"Around 
            
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Iceland N: 71 S: 59 E: 0 W: 45\"}]",
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Iceland N: 71 S: 59 E: 0 W: -45\"}]",
            
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  "maintainer": "Rob",
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  "maintainer": "Rob",
            
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  "maintainer_email": "rob.middag@nioz.nl",
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  "maintainer_email": "rob.middag@nioz.nl",
            
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  "metadata_modified": "2026-04-08T10:48:36.918594",
            
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  "name": "metalgate-cruise-data-00000001",
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  "name": "metalgate-cruise-data",
            
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  "notes": "The expedition 64PE474 aboard RV Pelagia started on the 
66
  "notes": "The expedition 64PE474 aboard RV Pelagia started on the 
            
67
18th of July 2021, leaving from Reykjavik (Iceland), half a day later 
67
18th of July 2021, leaving from Reykjavik (Iceland), half a day later 
            
68
than initially planned owing to delayed luggage that also contained 
68
than initially planned owing to delayed luggage that also contained 
            
69
essential equipment for the expedition. The expedition ended on August 
69
essential equipment for the expedition. The expedition ended on August 
            
70
16th 2021, also in Reykjavik (Iceland). During the expedition, samples 
70
16th 2021, also in Reykjavik (Iceland). During the expedition, samples 
            
71
were taken using several systems. The \u2018Titan\u2019 ultraclean CTD 
71
were taken using several systems. The \u2018Titan\u2019 ultraclean CTD 
            
72
sampling system (UCC) for trace metal collection (De Baar, et al. 
72
sampling system (UCC) for trace metal collection (De Baar, et al. 
            
73
2008), mounted with pristine large volume samplers (Rijkenberg, et al. 
73
2008), mounted with pristine large volume samplers (Rijkenberg, et al. 
            
74
2015), was used the most as part of the trace metal focal point of the 
74
2015), was used the most as part of the trace metal focal point of the 
            
75
expedition. The large volume Pristine samplers were made from 
75
expedition. The large volume Pristine samplers were made from 
            
76
polypropylene to allow sampling for light sensitive phytoplankton. 
76
polypropylene to allow sampling for light sensitive phytoplankton. 
            
77
After deployment, the complete CTD sampling system was placed in a 
77
After deployment, the complete CTD sampling system was placed in a 
            
78
cleanroom environment inside a modified high cube shipping container 
78
cleanroom environment inside a modified high cube shipping container 
            
79
where subsamples were collected for trace metals, isotopes, ligands, 
79
where subsamples were collected for trace metals, isotopes, ligands, 
            
80
and various auxiliary parameters (see section 2.4). The other deployed 
80
and various auxiliary parameters (see section 2.4). The other deployed 
            
81
instruments included a conventional CTD rosette system (CTD),  a 
81
instruments included a conventional CTD rosette system (CTD),  a 
            
82
multi-corer (MUC) to collect sediment cores from which samples were 
82
multi-corer (MUC) to collect sediment cores from which samples were 
            
83
taken for both sediments and porewaters, and a novel bottom gradient 
83
taken for both sediments and porewaters, and a novel bottom gradient 
            
84
sampler (BGS) to sample dissolved and particulate trace metals close 
84
sampler (BGS) to sample dissolved and particulate trace metals close 
            
85
to the seafloor. \nOverall, 38 full depth stations were sampled with 
85
to the seafloor. \nOverall, 38 full depth stations were sampled with 
            
86
in total 38 UCC casts, 14 CTD casts, 19 BGS casts, and 13 MUC casts. 
86
in total 38 UCC casts, 14 CTD casts, 19 BGS casts, and 13 MUC casts. 
            
87
Additionally, 2 shallow stations (station 4 and 26) were occupied to 
87
Additionally, 2 shallow stations (station 4 and 26) were occupied to 
            
88
collect surface water to start the planned bioassays. During the 
88
collect surface water to start the planned bioassays. During the 
            
89
expedition, 2 large, 6-day bio-assays were conducted (see section 2.5) 
89
expedition, 2 large, 6-day bio-assays were conducted (see section 2.5) 
            
90
to investigate the influence of Fe concentrations and temperature on 
90
to investigate the influence of Fe concentrations and temperature on 
            
91
phytoplankton biomass and composition. Another 2-day bioassay was also 
91
phytoplankton biomass and composition. Another 2-day bioassay was also 
            
92
carried out to further investigate the influence of Fe and ammonium on 
92
carried out to further investigate the influence of Fe and ammonium on 
            
93
phytoplankton productivity and composition. For these bioassays, 2 
93
phytoplankton productivity and composition. For these bioassays, 2 
            
94
large custom-built temperature-controlled incubators where used that 
94
large custom-built temperature-controlled incubators where used that 
            
95
were place on the deck in front of the bridge of RV Pelagia where 
95
were place on the deck in front of the bridge of RV Pelagia where 
            
96
irradiance was mostly unobstructed. Additionally, 32 smaller bioassays 
96
irradiance was mostly unobstructed. Additionally, 32 smaller bioassays 
            
97
were conducted by Willem Poll\u2019s group at controlled temperature 
97
were conducted by Willem Poll\u2019s group at controlled temperature 
            
98
and irradiance levels inside a climate-controlled container laboratory 
98
and irradiance levels inside a climate-controlled container laboratory 
            
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on Pelagia.",
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on Pelagia.",
            
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