Dissolved trace elements in profiles and surface waters collected during the Chinese GEOTRACES cruise (GP09) in the tropical northwest Pacific Ocean from April to June 2019

Website: https://www.bco-dmo.org/dataset/931959
Data Type: Cruise Results
Version: 1
Version Date: 2024-07-10

Project
» Dissolved trace elements in the tropical Northwest Pacific Ocean (Trace elements in NW Pacific)
ContributorsAffiliationRole
Shiller, Alan M.University of Southern Mississippi (USM)Principal Investigator
Gilbert, MelissaUniversity of Southern Mississippi (USM)Scientist
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
This is a study of dissolved trace elements in profiles and surface waters collected during the Spring 2019 Chinese GEOTRACES cruise (GP09) in the tropical northwest Pacific Ocean. GP09 afforded the opportunity to obtain trace element clean water samples (provided by the cruise organizers) from a region that is geologically complex as well as being a meeting place for various ocean currents and water masses. GP09 sampled the southwest corner of the North Pacific subtropical gyre, one of the largest oligotropic ocean regions and arguably the largest continuous ecosystem on Earth. Yet this region has been poorly studied for trace element distributions. We determined dissolved trace element concentrations by using established high-resolution ICP-MS methods.


Coverage

Location: Tropical Northwest Pacific Ocean
Spatial Extent: N:23.59 E:155 S:10.994 W:118.414
Temporal Extent: 2019-04-28 - 2019-06-09

Methods & Sampling

Sampling protocol: GEOTRACES protocols were followed and are briefly described in the cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/report/17252/. Profile samples were collected using a clean rosette/CTD system using cleaned 12-liter (L) GO Niskin-X bottles. Water was filtered in a clean van through AcroPak 1000 cartridges. Clean surface water samples were obtained using a clean fish system similar to systems used on US GEOTRACES cruises. A 6-meter (m) boom kept the sampling system away from the ship and low-density polyethylene tubing was used to pump water to the clean van. Note that samples were collected and filtered by other GP09 scientists; we provided pre-cleaned bottles that were filled at sea and shipped to us.

Analytical protocol: We used high-resolution inductively coupled plasma mass spectrometry (ICP-MS) with calibration by isotope dilution, where possible. All elements except Mo and Ba were preconcentrated using a SeaFAST system. Mo and Ba were instead determined after 30-fold dilution in ultrapure water. See GEOTRACES Intercalibration Report (see Supplemental Files section of metadata) for details. Also see: Gilbert et al., 2023 (Ga); Ho et al., 2018 (Mo, V), Whitmore et al., 2022 (Ba); Rahman et al., 2022 (Ba); and Cao et al., 2024 (REEs).


Data Processing Description

Quality Flags:
SeaDataNet quality flags have been assigned. More information on SeaDataNet quality flags is available from GEOTRACES at https://www.geotraces.org/geotraces-quality-flag-policy/ and from SeaDataNet at https://www.seadatanet.org/Standards/Data-Quality-Control. In summary:

0 = no quality control;
1 = good value;
2 = probably good value;
3 = probably bad value;
4 = bad value;
5 = changed value;
6 = value below detection;
7 = value in excess;
8 = interpolated value;
9 = missing value;
A = value phenomenon uncertain.


BCO-DMO Processing Description

- Imported original file "KK1903_dataTemplate_Shiller.xlsx" into the BCO-DMO system.
- Renamed fields to comply with BCO-DMO naming conventions.
- Created start and end date-time columns in ISO8601 format.
- Removed Gear_ID column (not used).
- Saved the final file as "931959_v1_gp09_dissolved_trace_elements.csv".
- Converted the Intercalibration report from .docx to .pdf and attached it as a Supplemental File named "0000-0002-2068-7909-KK1903-multiple-param-intercal-report.pdf".


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Data Files

File
931959_v1_gp09_dissolved_trace_elements.csv
(Comma Separated Values (.csv), 186.46 KB)
MD5:057c5e0c237ebf1255cf4dce40ba506a
Primary data file for dataset ID 931959, version 1

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Supplemental Files

File
0000-0002-2068-7909-KK1903-multiple-param-intercal-report.pdf
(Portable Document Format (.pdf), 1.71 MB)
MD5:cc4408056ba1ebe7285819dfa8893723
Cruise KK1903 GEOTRACES Intercalibration Report for dataset 931959 (PI: Alan Shiller)

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Related Publications

Cao, A., Liu, Q., Zhang, J., Shiller, A. M., Cai, Y., Zhang, R., Gilbert, M., Guo, X., & Liu, Z. (2024). Dissolved rare earth elements in the North Pacific Subtropical Gyre: Lithogenic sources and water mass mixing control. Geochimica et Cosmochimica Acta, 372, 42–61. https://doi.org/10.1016/j.gca.2024.02.018
Methods
Gilbert, M., Ho, P., Whitmore, L., & Shiller, A. (2023). Automated determination of gallium in seawater using seaFAST pre-concentration and high-resolution inductively-coupled plasma mass spectrometry. Analytica Chimica Acta, 1241, 340799. https://doi.org/10.1016/j.aca.2023.340799
Methods
Ho, P., Lee, J.-M., Heller, M. I., Lam, P. J., & Shiller, A. M. (2018). The distribution of dissolved and particulate Mo and V along the U.S. GEOTRACES East Pacific Zonal Transect (GP16): The roles of oxides and biogenic particles in their distributions in the oxygen deficient zone and the hydrothermal plume. Marine Chemistry, 201, 242–255. https://doi.org/10.1016/j.marchem.2017.12.003
Methods
Rahman, S., Shiller, A. M., Anderson, R. F., Charette, M. A., Hayes, C. T., Gilbert, M., Grissom, K. R., Lam, P. J., Ohnemus, D. C., Pavia, F. J., Twining, B. S., & Vivancos, S. M. (2022). Dissolved and Particulate Barium Distributions Along the US GEOTRACES North Atlantic and East Pacific Zonal Transects (GA03 and GP16): Global Implications for the Marine Barium Cycle. Global Biogeochemical Cycles, 36(6). Portico. https://doi.org/10.1029/2022gb007330 https://doi.org/10.1029/2022GB007330
Methods
Whitmore, L. M., Shiller, A. M., Horner, T. J., Xiang, Y., Auro, M. E., Bauch, D., Dehairs, F., Lam, P. J., Li, J., Maldonado, M. T., Mears, C., Newton, R., Pasqualini, A., Planquette, H., Rember, R., & Thomas, H. (2022). Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis. Journal of Geophysical Research: Oceans, 127(4). Portico. https://doi.org/10.1029/2021jc017417 https://doi.org/10.1029/2021JC017417
Methods

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Parameters

ParameterDescriptionUnits
Station_ID

Station number

unitless
Event_ID

Event number

unitless
Start_ISO_DateTime_UTC

Date and time (UTC) at start of sampling event in ISO 8601 format

unitless
End_ISO_DateTime_UTC

Date and time (UTC) at end of sampling event in ISO 8601 format

unitless
Start_Date_UTC

Date at start of sampling event

unitless
Start_Time_UTC

Time (UTC) at start of sampling event

unitless
End_Date_UTC

Date at end of sampling event

unitless
End_Time_UTC

Time (UTC) at end of event

unitless
Start_Latitude

Latitude at start of sampling event

decimal degrees
Start_Longitude

Longitude at start of sampling event

decimal degrees
End_Latitude

Latitude at end of sampling event

decimal degrees
End_Longitude

Longitude at end of sampling event

decimal degrees
Rosette_Position

Bottle position on rosette

unitless
Sample_ID

Sample ID number

unitless
Sample_Depth

Sample depth

meters (m)
Ba_D_CONC_BOTTLE_itzwe9

Concentration of dissolved Ba from bottle samples

nanomoles per kilogram (nmol/kg)
SD1_Ba_D_CONC_BOTTLE_itzwe9

Standard deviation of Ba_D_CONC_BOTTLE_itzwe9

nanomoles per kilogram (nmol/kg)
Flag_Ba_D_CONC_BOTTLE_itzwe9

Quality flag for Ba_D_CONC_BOTTLE_itzwe9

unitless
Cu_D_CONC_BOTTLE_ccmjgy

Concentration of dissolved Cu from bottle samples

nanomoles per kilogram (nmol/kg)
SD1_Cu_D_CONC_BOTTLE_ccmjgy

Standard deviation of Cu_D_CONC_BOTTLE_ccmjgy

nanomoles per kilogram (nmol/kg)
Flag_Cu_D_CONC_BOTTLE_ccmjgy

Quality flag for Cu_D_CONC_BOTTLE_ccmjgy

unitless
Ga_D_CONC_BOTTLE_8cvxtj

Concentration of dissolved Ga from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Ga_D_CONC_BOTTLE_8cvxtj

Standard deviation of Ga_D_CONC_BOTTLE_8cvxtj

picomoles per kilogram (pmol/kg)
Flag_Ga_D_CONC_BOTTLE_8cvxtj

Quality flag for Ga_D_CONC_BOTTLE_8cvxtj

unitless
Mn_D_CONC_BOTTLE_do8nav

Concentration of dissolved Mn from bottle samples

nanomoles per kilogram (nmol/kg)
SD1_Mn_D_CONC_BOTTLE_do8nav

Standard deviation of Mn_D_CONC_BOTTLE_do8nav

nanomoles per kilogram (nmol/kg)
Flag_Mn_D_CONC_BOTTLE_do8nav

Quality flag for Mn_D_CONC_BOTTLE_do8nav

unitless
Mo_D_CONC_BOTTLE_ice49g

Concentration of dissolved Mo from bottle samples

nanomoles per kilogram (nmol/kg)
SD1_Mo_D_CONC_BOTTLE_ice49g

Standard deviation of Mo_D_CONC_BOTTLE_ice49g

nanomoles per kilogram (nmol/kg)
Flag_Mo_D_CONC_BOTTLE_ice49g

Quality flag for Mo_D_CONC_BOTTLE_ice49g

unitless
Ni_D_CONC_BOTTLE_n7tn4h

Concentration of dissolved Ni from bottle samples

nanomoles per kilogram (nmol/kg)
SD1_Ni_D_CONC_BOTTLE_n7tn4h

Standard deviation of Ni_D_CONC_BOTTLE_n7tn4h

nanomoles per kilogram (nmol/kg)
Flag_Ni_D_CONC_BOTTLE_n7tn4h

Quality flag for Ni_D_CONC_BOTTLE_n7tn4h

unitless
Pb_D_CONC_BOTTLE_5g4emy

Concentration of dissolved Pb from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Pb_D_CONC_BOTTLE_5g4emy

Standard deviation of Pb_D_CONC_BOTTLE_5g4emy

picomoles per kilogram (pmol/kg)
Flag_Pb_D_CONC_BOTTLE_5g4emy

Quality flag for Pb_D_CONC_BOTTLE_5g4emy

unitless
V_D_CONC_BOTTLE_rps5rc

Concentration of dissolved V from bottle samples

nanomoles per kilogram (nmol/kg)
SD1_V_D_CONC_BOTTLE_rps5rc

Standard deviation of V_D_CONC_BOTTLE_rps5rc

nanomoles per kilogram (nmol/kg)
Flag_V_D_CONC_BOTTLE_rps5rc

Quality flag for V_D_CONC_BOTTLE_rps5rc

unitless
Y_D_CONC_BOTTLE_i4xjdi

Concentration of dissolved Y from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Y_D_CONC_BOTTLE_i4xjdi

Standard deviation of Y_D_CONC_BOTTLE_i4xjdi

picomoles per kilogram (pmol/kg)
Flag_Y_D_CONC_BOTTLE_i4xjdi

Quality flag for Y_D_CONC_BOTTLE_i4xjdi

unitless
La_D_CONC_BOTTLE_0i4lyy

Concentration of dissolved La from bottle samples

picomoles per kilogram (pmol/kg)
SD1_La_D_CONC_BOTTLE_0i4lyy

Standard deviation of La_D_CONC_BOTTLE_0i4lyy

picomoles per kilogram (pmol/kg)
Flag_La_D_CONC_BOTTLE_0i4lyy

Quality flag for La_D_CONC_BOTTLE_0i4lyy

unitless
Ce_D_CONC_BOTTLE_5ujocf

Concentration of dissolved Ce from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Ce_D_CONC_BOTTLE_5ujocf

Standard deviation of Ce_D_CONC_BOTTLE_5ujocf

picomoles per kilogram (pmol/kg)
Flag_Ce_D_CONC_BOTTLE_5ujocf

Quality flag for Ce_D_CONC_BOTTLE_5ujocf

unitless
Pr_D_CONC_BOTTLE_hxzcbb

Concentration of dissolved Pr from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Pr_D_CONC_BOTTLE_hxzcbb

Standard deviation of Pr_D_CONC_BOTTLE_hxzcbb

picomoles per kilogram (pmol/kg)
Flag_Pr_D_CONC_BOTTLE_hxzcbb

Quality flag for Pr_D_CONC_BOTTLE_hxzcbb

unitless
Nd_D_CONC_BOTTLE_dlc4ah

Concentration of dissolved Nd from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Nd_D_CONC_BOTTLE_dlc4ah

Standard deviation of Nd_D_CONC_BOTTLE_dlc4ah

picomoles per kilogram (pmol/kg)
Flag_Nd_D_CONC_BOTTLE_dlc4ah

Quality flag for Nd_D_CONC_BOTTLE_dlc4ah

unitless
Sm_D_CONC_BOTTLE_t6f5zy

Concentration of dissolved Sm from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Sm_D_CONC_BOTTLE_t6f5zy

Standard deviation of Sm_D_CONC_BOTTLE_t6f5zy

picomoles per kilogram (pmol/kg)
Flag_Sm_D_CONC_BOTTLE_t6f5zy

Quality flag for Sm_D_CONC_BOTTLE_t6f5zy

unitless
Eu_D_CONC_BOTTLE_07fvuy

Concentration of dissolved Eu from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Eu_D_CONC_BOTTLE_07fvuy

Standard deviation of Eu_D_CONC_BOTTLE_07fvuy

picomoles per kilogram (pmol/kg)
Flag_Eu_D_CONC_BOTTLE_07fvuy

Quality flag for Eu_D_CONC_BOTTLE_07fvuy

unitless
Gd_D_CONC_BOTTLE_yk78vk

Concentration of dissolved Gd from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Gd_D_CONC_BOTTLE_yk78vk

Standard deviation of Gd_D_CONC_BOTTLE_yk78vk

picomoles per kilogram (pmol/kg)
Flag_Gd_D_CONC_BOTTLE_yk78vk

Quality flag for Gd_D_CONC_BOTTLE_yk78vk

unitless
Tb_D_CONC_BOTTLE_9zjxfm

Concentration of dissolved Tb from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Tb_D_CONC_BOTTLE_9zjxfm

Standard deviation of Tb_D_CONC_BOTTLE_9zjxfm

picomoles per kilogram (pmol/kg)
Flag_Tb_D_CONC_BOTTLE_9zjxfm

Quality flag for Tb_D_CONC_BOTTLE_9zjxfm

unitless
Dy_D_CONC_BOTTLE_khzysy

Concentration of dissolved Dy from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Dy_D_CONC_BOTTLE_khzysy

Standard deviation of Dy_D_CONC_BOTTLE_khzysy

picomoles per kilogram (pmol/kg)
Flag_Dy_D_CONC_BOTTLE_khzysy

Quality flag for Dy_D_CONC_BOTTLE_khzysy

unitless
Ho_D_CONC_BOTTLE_rrxp5y

Concentration of dissolved Ho from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Ho_D_CONC_BOTTLE_rrxp5y

Standard deviation of Ho_D_CONC_BOTTLE_rrxp5y

picomoles per kilogram (pmol/kg)
Flag_Ho_D_CONC_BOTTLE_rrxp5y

Quality flag for Ho_D_CONC_BOTTLE_rrxp5y

unitless
Er_D_CONC_BOTTLE_rzsrsx

Concentration of dissolved Er from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Er_D_CONC_BOTTLE_rzsrsx

Standard deviation of Er_D_CONC_BOTTLE_rzsrsx

picomoles per kilogram (pmol/kg)
Flag_Er_D_CONC_BOTTLE_rzsrsx

Quality flag for Er_D_CONC_BOTTLE_rzsrsx

unitless
Tm_D_CONC_BOTTLE_thtfhx

Concentration of dissolved Tm from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Tm_D_CONC_BOTTLE_thtfhx

Standard deviation of Tm_D_CONC_BOTTLE_thtfhx

picomoles per kilogram (pmol/kg)
Flag_Tm_D_CONC_BOTTLE_thtfhx

Quality flag for Tm_D_CONC_BOTTLE_thtfhx

unitless
Yb_D_CONC_BOTTLE_ft7p4l

Concentration of dissolved Yb from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Yb_D_CONC_BOTTLE_ft7p4l

Standard deviation of Yb_D_CONC_BOTTLE_ft7p4l

picomoles per kilogram (pmol/kg)
Flag_Yb_D_CONC_BOTTLE_ft7p4l

Quality flag for Yb_D_CONC_BOTTLE_ft7p4l

unitless
Lu_D_CONC_BOTTLE_vm4rjv

Concentration of dissolved Lu from bottle samples

picomoles per kilogram (pmol/kg)
SD1_Lu_D_CONC_BOTTLE_vm4rjv

Standard deviation of Lu_D_CONC_BOTTLE_vm4rjv

picomoles per kilogram (pmol/kg)
Flag_Lu_D_CONC_BOTTLE_vm4rjv

Quality flag for Lu_D_CONC_BOTTLE_vm4rjv

unitless
Ba_D_CONC_FISH_hra1ob

Concentration of dissolved Ba from towed fish samples

nanomoles per kilogram (nmol/kg)
SD1_Ba_D_CONC_FISH_hra1ob

Standard deviation of Ba_D_CONC_FISH_hra1ob

nanomoles per kilogram (nmol/kg)
Flag_Ba_D_CONC_FISH_hra1ob

Quality flag for Ba_D_CONC_FISH_hra1ob

unitless
Cu_D_CONC_FISH_1baozt

Concentration of dissolved Cu from towed fish samples

nanomoles per kilogram (nmol/kg)
SD1_Cu_D_CONC_FISH_1baozt

Standard deviation of Cu_D_CONC_FISH_1baozt

nanomoles per kilogram (nmol/kg)
Flag_Cu_D_CONC_FISH_1baozt

Quality flag for Cu_D_CONC_FISH_1baozt

unitless
Ga_D_CONC_FISH_dly4du

Concentration of dissolved Ga from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Ga_D_CONC_FISH_dly4du

Standard deviation of Ga_D_CONC_FISH_dly4du

picomoles per kilogram (pmol/kg)
Flag_Ga_D_CONC_FISH_dly4du

Quality flag for Ga_D_CONC_FISH_dly4du

unitless
Mn_D_CONC_FISH_b7capx

Concentration of dissolved Mn from towed fish samples

nanomoles per kilogram (nmol/kg)
SD1_Mn_D_CONC_FISH_b7capx

Standard deviation of Mn_D_CONC_FISH_b7capx

nanomoles per kilogram (nmol/kg)
Flag_Mn_D_CONC_FISH_b7capx

Quality flag for Mn_D_CONC_FISH_b7capx

unitless
Mo_D_CONC_FISH_nuboeh

Concentration of dissolved Mo from towed fish samples

nanomoles per kilogram (nmol/kg)
SD1_Mo_D_CONC_FISH_nuboeh

Standard deviation of Mo_D_CONC_FISH_nuboeh

nanomoles per kilogram (nmol/kg)
Flag_Mo_D_CONC_FISH_nuboeh

Quality flag for Mo_D_CONC_FISH_nuboeh

unitless
Ni_D_CONC_FISH_uxcluf

Concentration of dissolved Ni from towed fish samples

nanomoles per kilogram (nmol/kg)
SD1_Ni_D_CONC_FISH_uxcluf

Standard deviation of Ni_D_CONC_FISH_uxcluf

nanomoles per kilogram (nmol/kg)
Flag_Ni_D_CONC_FISH_uxcluf

Quality flag for Ni_D_CONC_FISH_uxcluf

unitless
Pb_D_CONC_FISH_n6tdnb

Concentration of dissolved Pb from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Pb_D_CONC_FISH_n6tdnb

Standard deviation of Pb_D_CONC_FISH_n6tdnb

picomoles per kilogram (pmol/kg)
Flag_Pb_D_CONC_FISH_n6tdnb

Quality flag for Pb_D_CONC_FISH_n6tdnb

unitless
V_D_CONC_FISH_opbkyb

Concentration of dissolved V from towed fish samples

nanomoles per kilogram (nmol/kg)
SD1_V_D_CONC_FISH_opbkyb

Standard deviation of V_D_CONC_FISH_opbkyb

nanomoles per kilogram (nmol/kg)
Flag_V_D_CONC_FISH_opbkyb

Quality flag for V_D_CONC_FISH_opbkyb

unitless
Y_D_CONC_FISH_tmyjc3

Concentration of dissolved Y from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Y_D_CONC_FISH_tmyjc3

Standard deviation of Y_D_CONC_FISH_tmyjc3

picomoles per kilogram (pmol/kg)
Flag_Y_D_CONC_FISH_tmyjc3

Quality flag for Y_D_CONC_FISH_tmyjc3

unitless
La_D_CONC_FISH_j3fhke

Concentration of dissolved La from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_La_D_CONC_FISH_j3fhke

Standard deviation of La_D_CONC_FISH_j3fhke

picomoles per kilogram (pmol/kg)
Flag_La_D_CONC_FISH_j3fhke

Quality flag for La_D_CONC_FISH_j3fhke

unitless
Ce_D_CONC_FISH_zhuata

Concentration of dissolved Ce from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Ce_D_CONC_FISH_zhuata

Standard deviation of Ce_D_CONC_FISH_zhuata

picomoles per kilogram (pmol/kg)
Flag_Ce_D_CONC_FISH_zhuata

Quality flag for Ce_D_CONC_FISH_zhuata

unitless
Pr_D_CONC_FISH_iqdohc

Concentration of dissolved Pr from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Pr_D_CONC_FISH_iqdohc

Standard deviation of Pr_D_CONC_FISH_iqdohc

picomoles per kilogram (pmol/kg)
Flag_Pr_D_CONC_FISH_iqdohc

Quality flag for Pr_D_CONC_FISH_iqdohc

unitless
Nd_D_CONC_FISH_atm156

Concentration of dissolved Nd from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Nd_D_CONC_FISH_atm156

Standard deviation of Nd_D_CONC_FISH_atm156

picomoles per kilogram (pmol/kg)
Flag_Nd_D_CONC_FISH_atm156

Quality flag for Nd_D_CONC_FISH_atm156

unitless
Sm_D_CONC_FISH_1vsmf0

Concentration of dissolved Sm from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Sm_D_CONC_FISH_1vsmf0

Standard deviation of Sm_D_CONC_FISH_1vsmf0

picomoles per kilogram (pmol/kg)
Flag_Sm_D_CONC_FISH_1vsmf0

Quality flag for Sm_D_CONC_FISH_1vsmf0

unitless
Eu_D_CONC_FISH_xodk9s

Concentration of dissolved Eu from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Eu_D_CONC_FISH_xodk9s

Standard deviation of Eu_D_CONC_FISH_xodk9s

picomoles per kilogram (pmol/kg)
Flag_Eu_D_CONC_FISH_xodk9s

Quality flag for Eu_D_CONC_FISH_xodk9s

unitless
Gd_D_CONC_FISH_xiy5ir

Concentration of dissolved Gd from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Gd_D_CONC_FISH_xiy5ir

Standard deviation of Gd_D_CONC_FISH_xiy5ir

picomoles per kilogram (pmol/kg)
Flag_Gd_D_CONC_FISH_xiy5ir

Quality flag for Gd_D_CONC_FISH_xiy5ir

unitless
Tb_D_CONC_FISH_nvbybp

Concentration of dissolved Tb from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Tb_D_CONC_FISH_nvbybp

Standard deviation of Tb_D_CONC_FISH_nvbybp

picomoles per kilogram (pmol/kg)
Flag_Tb_D_CONC_FISH_nvbybp

Quality flag for Tb_D_CONC_FISH_nvbybp

unitless
Dy_D_CONC_FISH_50moex

Concentration of dissolved Dy from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Dy_D_CONC_FISH_50moex

Standard deviation of Dy_D_CONC_FISH_50moex

picomoles per kilogram (pmol/kg)
Flag_Dy_D_CONC_FISH_50moex

Quality flag for Dy_D_CONC_FISH_50moex

unitless
Ho_D_CONC_FISH_r1m8ab

Concentration of dissolved Ho from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Ho_D_CONC_FISH_r1m8ab

Standard deviation of Ho_D_CONC_FISH_r1m8ab

picomoles per kilogram (pmol/kg)
Flag_Ho_D_CONC_FISH_r1m8ab

Quality flag for Ho_D_CONC_FISH_r1m8ab

unitless
Er_D_CONC_FISH_aemigv

Concentration of dissolved Er from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Er_D_CONC_FISH_aemigv

Standard deviation of Er_D_CONC_FISH_aemigv

picomoles per kilogram (pmol/kg)
Flag_Er_D_CONC_FISH_aemigv

Quality flag for Er_D_CONC_FISH_aemigv

unitless
Tm_D_CONC_FISH_k9km6b

Concentration of dissolved Tm from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Tm_D_CONC_FISH_k9km6b

Standard deviation of Tm_D_CONC_FISH_k9km6b

picomoles per kilogram (pmol/kg)
Flag_Tm_D_CONC_FISH_k9km6b

Quality flag for Tm_D_CONC_FISH_k9km6b

unitless
Yb_D_CONC_FISH_t7qjfy

Concentration of dissolved Yb from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Yb_D_CONC_FISH_t7qjfy

Standard deviation of Yb_D_CONC_FISH_t7qjfy

picomoles per kilogram (pmol/kg)
Flag_Yb_D_CONC_FISH_t7qjfy

Quality flag for Yb_D_CONC_FISH_t7qjfy

unitless
Lu_D_CONC_FISH_q2njui

Concentration of dissolved Lu from towed fish samples

picomoles per kilogram (pmol/kg)
SD1_Lu_D_CONC_FISH_q2njui

Standard deviation of Lu_D_CONC_FISH_q2njui

picomoles per kilogram (pmol/kg)
Flag_Lu_D_CONC_FISH_q2njui

Quality flag for Lu_D_CONC_FISH_q2njui

unitless


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Instruments

Dataset-specific Instrument Name
12-L GO Niskin-X bottles
Generic Instrument Name
Niskin bottle
Generic Instrument Description
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Dataset-specific Instrument Name
ThermoFisher Element XR ICP-MS
Generic Instrument Name
Thermo Scientific ELEMENT XR high resolution inductively coupled plasma mass spectrometer
Generic Instrument Description
A high-resolution (HR) inductively coupled plasma (ICP) mass spectrometer (MS) composed of a dual mode secondary electron multiplier (SEM) and a Faraday detector. The ELEMENT XR instrument has a dynamic range of 5 x 10^7 to 1 x 10^12 counts per second (cps), and allows simultaneous measurement of elements at concentrations over 1000 ug/g.

Dataset-specific Instrument Name
a clean fish system similar to systems used on US GEOTRACES cruises
Generic Instrument Name
towed undulating vehicle
Generic Instrument Description
A towed undulating vehicle is a generic class of instruments. See the data set specific information for a detailed description. These are often prototype instrument packages designed to make very specific measurements.


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Deployments

KK1903

Website
Platform
R/V Tan Kah Kee
Report
Start Date
2019-04-25
End Date
2019-06-13


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Project Information

Dissolved trace elements in the tropical Northwest Pacific Ocean (Trace elements in NW Pacific)

Coverage: tropical Northwest Pacific Ocean


NSF Award Abstract:
This project involves a collaboration with Chinese scientists in the analysis of seawater samples collected during mid-2019 in the Northwest Pacific Ocean. The cruise (designated GP09) is part of an international collaborative research effort known as GEOTRACES, which is examining the distributions of trace elements and isotopes throughout the oceans. Some trace elements are micro-nutrients in the ocean, others are potentially toxic in small quantities, and still others can be tracers or indictors of the extent of various ocean processes such as hydrothermal inputs or productivity. The GP09 cruise affords an opportunity to obtain trace element clean water samples from a region that is geologically complex as well as being a meeting place for various ocean currents and water masses. It will sample the southwest corner of the North Pacific subtropical gyre, one of the largest oligotrophic (i.e., low nutrient) ocean regions and arguably the largest continuous ecosystem on Earth. This region is likely impacted by dust input (including anthropogenic aerosols), nitrogen fixation, hydrothermal inputs, and island effects associated with weathering of the Philippines and margin cycling. Determining material sources, sinks, and cycling in this region is ultimately important for understanding controls on the region's productivity. Many of the trace elements to be determined are also of relevance for paleo-proxy applications (i.e., for understanding what the sediment records of these elements tell us about past ocean processes). However, successful paleo-proxy applications generally require further insight into the processes that affect the cycling of the proxy elements. Because of the wide range of parameters to be determined by GP09 participants, the cruise affords substantial opportunities for collaboration with Chinese colleagues. The knowledge and experience gained from this project will be incorporated into the principle investigator's courses in oceanography. For outreach activities, in collaboration with the University of Southern Mississippi Marine Education Center, high school students will be invited to attend lectures given by scientists about their research. A postdoctoral scholar will also be trained as part of the project

A researcher from the University of Southern Mississippi will obtain clean, filtered trace element samples from a mid-2019 oceanographic research cruise in the Northwest Pacific Ocean. The cruise (GP09) is part of the GEOTRACES program and was led by researchers from Xiamen University, China, with additional participants from other major Chinese oceanographic institutions. The geological and hydrographic complexity, along with the oligotrophic nature of the GP09 cruise track, make this an especially interesting region for study. Trace element distributions are likely to provide insight into various source, sink, and cycling processes of broad interest. For example, a number of the elements we will study have been used (or proposed to be used) as paleoredox and paleoproductivity proxies [e.g., barium (Ba), rare earth elements (REEs), vanadium (V), cadmium (Cd)], but a better understanding of their oceanic cycling is needed to more fully understand their proxy signals. The studies proposed here are also pertinent to important issues including delivery of mineral dust and nutrient iron to the surface ocean [gallium (Ga), REEs and possibly Cd and V], removal and internal cycling of trace elements [Ba, REEs], tracing sources of material including margin sources [Ba, manganese (Mn), REEs, V] and hydrothermal influences [Mn, Ba, REEs], as well as understanding of conservative versus non-conservative changes in tracer distributions [Ba, REEs, V]. The cruise also allows extensive collaboration with other, mainly Chinese, investigators. Thus, the dissolved Ga data will be compared with data obtained by colleagues on distributions of other lithogenic, rapidly-scavenged elements like aluminum (Al) and thorium-232; the dissolved Ba data will be shared with those determining radium and Ba isotopes; and, the REE data will be made available to those examining neodymium isotopes, as well as compared with other scavenging tracers such as Ga, Al, and Th.

This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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