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Data Publisher for Earth & Environmental Science

Ceballos-Romero, Elena; Buesseler, Ken O; Muñoz-Nevado, Carlos; Villa-Alfageme, María (2021): More than 50 years of Th-234 data: a comprehensive global oceanic compilation. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.918125 (dataset in review)

Abstract:
The ²³⁴Th-²³⁸U radioactive pair has been extensively used to evaluate the efficiency with which photosyntetically fixed carbon is exported from the surface ocean by means of the biological pump since the 90's. The seminal work of Buesseler et al. (1992) proposed that particulate organic carbon (POC) flux can be indirectly calculated from ²³⁴Th distributions if the ratio of POC to ²³⁴Th measured on sinking particles (POC:²³⁴Th) at the desired export depth is known. Since then, a huge amount of ²³⁴Th depth profiles have been collected using a variety of sampling instruments and strategies that have changed along years.
This is a global oceanic compilation of ²³⁴Th measurements, that collects results from innumerable researchers and laboratories over a period exceeding 50 years. The present compilation is made of a total 223 datasets: 214 from studies published either in articles in referred journals, PhD thesis or repositories, and 9 unpublished datasets. Including measurements from JGOFS, VERTIGO and GEOTRACES programs, with sampling from approximately 5000 locations spanning all the oceans.
The compilation includes total ²³⁴Th profiles, dissolved and particulate ²³⁴Th concentrations, and POC:²³⁴Th ratios (both from pumps and sediment traps) for two sizes classes (1-53 μm and < 53 μm) when available.
Appropriate metadata have been included, including geographic location, date, and sample depth, among others. When available, we also include water temperature, salinity, ²³⁸U data and particulate organic nitrogen data. Data sources and methods information (including ²³⁸U and ²³⁴Th) are also detailed along with valuable information for future data analysis such as bloom stage and steady/non-steady state conditions at the sampling moment. This undertaking is a treasure of data to understand and quantify how oceanic carbon cycle functions and how it will change in future.
The compiled version is available under doi:10.1594/PANGAEA.937414.
Keyword(s):
234Th; biological carbon pump; carbon export; POC flux
Other version:
Ceballos-Romero, Elena; Buesseler, Ken O; Muñoz-Nevado, Carlos; Villa-Alfageme, María (2021): More than 50 years of Th-234 data: a comprehensive global oceanic compilation (compiled csv format). PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.937414
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Coverage:
Date/Time Start: 1967-01-01T00:00:00 * Date/Time End: 2018-11-24T00:00:00
Minimum ELEVATION: -6825 m a.s.l. * Maximum ELEVATION: -3 m a.s.l.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Reference of dataRef dataVilla-Alfageme, María
2Binary ObjectBinaryCeballos-Romero, ElenaLink to the excel file
3Author(s)Author(s)Villa-Alfageme, MaríaFirst author
4Journal/report titleJournalVilla-Alfageme, María
5Year of publicationYearVilla-Alfageme, María
6Uniform resource locator/link to referenceURL refVilla-Alfageme, María
7OceanOceanVilla-Alfageme, María
8Ocean and sea regionOS regionVilla-Alfageme, María
9LATITUDELatitudeVilla-Alfageme, MaríaGeocode – Latitude, northbound
10LATITUDELatitudeVilla-Alfageme, MaríaGeocode – Latitude, southbound
11LONGITUDELongitudeVilla-Alfageme, MaríaGeocode – Longitude, eastbound
12LONGITUDELongitudeVilla-Alfageme, MaríaGeocode – Longitude, westbound
13ELEVATIONElevationm a.s.l.Villa-Alfageme, MaríaGeocode – Maximum bottom depth (neg.)
14PeriodPeriodVilla-Alfageme, María
15DATE/TIMEDate/TimeVilla-Alfageme, MaríaGeocode – Start
16DATE/TIMEDate/TimeVilla-Alfageme, MaríaGeocode – End
17ProjectProjectVilla-Alfageme, María
18Multiple cruises/expeditionsMult expeditionVilla-Alfageme, María
19Cruise/expeditionExpeditionVilla-Alfageme, María
20VesselVesselVilla-Alfageme, MaríaShip
21Chief scientist(s)Chief scientist(s)Villa-Alfageme, María
22Uranium-238238UCeballos-Romero, Elena
23Thorium-234, total234Th totCeballos-Romero, Elena
24Thorium-234, dissolved234Th dissCeballos-Romero, Elena
25Thorium-234, particulate234Th partCeballos-Romero, Elena
26Carbon, organic, particulate/Thorium-234 ratioPOC/234ThCeballos-Romero, Elena
27GearGearCeballos-Romero, ElenaSediment traps
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
4056 data points

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