| 234Th flux in epipelagic waters at Station ALOHA and the Equatorial Pacific from R/V Kilo Moana cruises KM1407, KM1418, & KM1515 during 2014-2015 | Integrated 234Th flux; BD = below detection
| Th_flux |
| 234Th flux in epipelagic waters at Station ALOHA and the Equatorial Pacific from R/V Kilo Moana cruises KM1407, KM1418, & KM1515 during 2014-2015 | Integrated 234Th flux error
| Th_flux_error |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | RAP234 activities or the residual ? activity derived from beta counting after all unsupported 234Th has decayed away. RAP234 was first described in Lin et al. (2016). The residual background counts are reported for total particulates (large and small particle background counts were summed).
| RAp234_TPT_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Activity of large particle (>51 µm) thorium-234 from Niskin sampling and shipboard vacuum filtration.
| Th_234_LPT_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Activity of small particle (1-51 µm) thorium-234 from Niskin sampling and shipboard vacuum filtration.
| Th_234_SPT_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Activity of total thorium-234 from ODF rosette Niskins or above-McLane pump Niskins
| Th_234_T_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Uncertainty for RAp234_TPT_CONC. Propagated counting and measurement uncertainties ranged from 8% to 20%. To provide a conservative uncertainty estimate, a 20% uncertainty was applied to all values.
| Unc_RAp234_TPT_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Uncertainty for Th_234_LPT_CONC. Derived from counting statistics and error propagation for sample processing.
| Unc_Th_234_LPT_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Uncertainty for Th_234_SPT_CONC. Derived from counting statistics and error propagation for sample processing.
| Unc_Th_234_SPT_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from April to August 2019 | Uncertainty for Th_234_T_CONC. Derived from counting statistics and error propagation for mass/volume measurements and ICP-MS recovery analysis. See report for additional details.
| Unc_Th_234_T_CONC |
| Carbon content and radioisotope data from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from February to August 2019 | Excess 234Th activity in sediments (decays per minute per gram). BD indicates that while 234Th activities were measured, the activity of 234Th determined was within the uncertainty values of the supported 234Th determined for the sediment core. Thus, the supported and measured 234Th activities are indistinguishable.
| Th_234_EX_CONC_SED |
| Carbon content and radioisotope data from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from February to August 2019 | Uncertainty for Th_234_EX_CONC_SED. Sediment uncertainties for 234Th activities are the propagation of gamma counting errors and an assessment of potential variability in porosity and density estimates.
| Unc_Th_234_EX_CONC_SED |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | activity of particulate 234Th (sum of large and small particle 234Th activity)
| Part_Th_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | activity of 234Th
| Th_234_T_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | uncertainty of activity of particulate 234Th (sum of large and small particle 234Th activity)
| Unc_Part_Th_CONC |
| Seawater radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | uncertainty of activity of 234Th
| Unc_Th_234_T_CONC |
| Sediment radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | 234Th activity corrected for radioactive decay between collection and counting
| Decay_corr_234Th |
| Sediment radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | Measured (uncorrected) 234Th activity in the sample
| Raw_234Th |
| Sediment radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | Excess (unsupported) 234Th activity
| Thxs234 |
| Sediment radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | Analytical uncertainty (1?) associated with 234Thxs
| Unc_234Thxs |
| Sediment radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | Analytical uncertainty on decay-corrected 234Th
| Unc_Decay_corr_234Th |
| Sediment radioisotope (234Th) and carbon from sampling conducted at the Compass Station in Bedford Basin, Nova Scotia, Canada from 2021 to 2024 | Analytical uncertainty associated with Raw_234Th
| Unc_Raw_234Th |
| Water column total and particulate Thorium-234 from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Th_234_SPT_CONC_PUMP uncertainty.
| SD1_Th_234_LPT_CONC_PUMP_ndfccj |
| Water column total and particulate Thorium-234 from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Th-234 uncertainty. Derived from counting statistics and error propagation for mass/volume measurements and ICP-MS recovery analysis.
| SD1_Th_234_SPT_CONC_PUMP_kcfgxs |
| Water column total and particulate Thorium-234 from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Th_234_LPT_CONC_PUMP uncertainty.
| SD1_Th_234_T_CONC_BOTTLE_o9yxf7 |
| Water column total and particulate Thorium-234 from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Particulate Thorium-234 from QMA filters. Particle size of 1 to 51 um. Data were decay corrected back to mid-pump times.
| Th_234_LPT_CONC_PUMP_ndfccj |
| Water column total and particulate Thorium-234 from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Total Th-234 concentration collected from Niskin bottles on the CTD rosette.
| Th_234_SPT_CONC_PUMP_kcfgxs |
| Water column total and particulate Thorium-234 from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Particulate Thorium-234 from mesh screens, filtered onto silver filters. Particle size greater than 51 um. Data were decay corrected back to mid-pump times.
| Th_234_T_CONC_BOTTLE_o9yxf7 |
| Water column total and particulate Thorium-234 from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Th_234_SPT_CONC_PUMP uncertainty.
| SD1_Th_234_LPT_CONC_PUMP_dpcdrs |
| Water column total and particulate Thorium-234 from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Th-234 uncertainty. Derived from counting statistics and error propagation for mass/volume measurements and ICP-MS recovery analysis.
| SD1_Th_234_SPT_CONC_PUMP_r3ul1b |
| Water column total and particulate Thorium-234 from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Th_234_LPT_CONC_PUMP uncertainty.
| SD1_Th_234_T_CONC_BOTTLE_unblcb |
| Water column total and particulate Thorium-234 from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Particulate Thorium-234 from QMA filters. Particle size of 1 to 51 um. Data were decay corrected back to mid-pump times.
| Th_234_LPT_CONC_PUMP_dpcdrs |
| Water column total and particulate Thorium-234 from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Total Th-234 concentration collected from Niskin bottles on the CTD rosette.
| Th_234_SPT_CONC_PUMP_r3ul1b |
| Water column total and particulate Thorium-234 from Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Particulate Thorium-234 from mesh screens, filtered onto silver filters. Particle size greater than 51 um. Data were decay corrected back to mid-pump times.
| Th_234_T_CONC_BOTTLE_unblcb |
| Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 | Th_234_LPT_CONC_PUMP uncertainty
| SD1_Th_234_LPT_CONC_PUMP_cgdpur |
| Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 | Th_234_SPT_CONC_PUMP uncertainty
| SD1_Th_234_SPT_CONC_PUMP_sgquid |
| Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 | Th_234_T_CONC_BOTTLE uncertainty
| SD1_Th_234_T_CONC_BOTTLE_82mvlk |
| Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 | Particulate Thorium-234 from QMA filters. Particle size of 1 to 51um. Data were decay corrected back to mid-pump times.
| Th_234_LPT_CONC_PUMP_cgdpur |
| Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 | Particulate Thorium-234 from QMA filters. Particle size of 1um. Data were decay corrected back to mid-pump times.
| Th_234_SPT_CONC_PUMP_sgquid |
| Water column total and particulate Thorium-234 from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 | Total Thorium-234 from 2L unfiltered water. Data were decay corrected back to mid-collection time.
| Th_234_T_CONC_BOTTLE_82mvlk |
| Bottle data along with US GEOTRACES North Atlantic Transect from the R/V Knorr KN204-01 cruise in the subtropical N. Atlantic during 2011 (U.S. GEOTRACES NAT project) | TH-234
| TH234 |
| TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017 | particulate thorium-234 activity
| Th234_part |
| TPC, PIC, POC, TPN, and Th-234 from in-situ pumps at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) site in the Northeast Atlantic Ocean during RRS Discovery cruise DY077 in April of 2017 | particulate thorium-234 uncertainty, propagated from counting statistics. See note in Processing Description regarding QMA punch-to-punch variability.
| Th234_part_err |
| Activity percent and composition percent of radionuclides, protein, carbohydrates, and iron at various pH levels using isoelectric focusing of radionuclide-labeled EPS | 234Th exopolymeric substance extracted from diatoms cultured under Si-depleted (f/2-Si medium) conditions
| Th234_pcnt_activity_EPS_Si_minus |
| Activity percent and composition percent of radionuclides, protein, carbohydrates, and iron at various pH levels using isoelectric focusing of radionuclide-labeled EPS | 234Th exopolymeric substance extracted from diatoms cultured under Si-replete (f/2 medium) conditions
| Th234_pcnt_activity_EPS_Si_plus |
| Small and large particle concentrations of total carbon, total nitrogen, and inorganic carbon, and particulate thorium-234 and RAP234 from large volume pump profiles collected on R/V Endeavor cruise EN665 in the Gulf of Maine in April 2021 | Large particle residual beta activity for thorium-234
| RAP234_LP |
| Small and large particle concentrations of total carbon, total nitrogen, and inorganic carbon, and particulate thorium-234 and RAP234 from large volume pump profiles collected on R/V Endeavor cruise EN665 in the Gulf of Maine in April 2021 | Large particle residual beta activity for thorium-234 error
| RAP234_LP_ERR |
| Small and large particle concentrations of total carbon, total nitrogen, and inorganic carbon, and particulate thorium-234 and RAP234 from large volume pump profiles collected on R/V Endeavor cruise EN665 in the Gulf of Maine in April 2021 | Small particle residual beta activity for thorium-234
| RAP234_SP |
| Small and large particle concentrations of total carbon, total nitrogen, and inorganic carbon, and particulate thorium-234 and RAP234 from large volume pump profiles collected on R/V Endeavor cruise EN665 in the Gulf of Maine in April 2021 | Small particle residual beta activity for thorium-234 error
| RAP234_SP_ERR |
| Small and large particle concentrations of total carbon, total nitrogen, and inorganic carbon, and particulate thorium-234 and RAP234 from large volume pump profiles collected on R/V Endeavor cruise EN665 in the Gulf of Maine in April 2021 | Large particle thorium-234 activity
| Th234_LP |
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