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Global particulate organic carbon flux derived from Th-234: 13 ocean regions, 3 export depths

The 234Th–238U disequilibrium technique has been widely used to estimate the amount of particulate organic carbon (POC) exported from surface ocean layers to the deep sea. This method is based on determining 234Th fluxes from vertical 234Th–238U profiles in the water column and converting them into POC fluxes using POC/234Th ratios measured in sinking particles at a given calculation depth. We present here an extensive repository of POC fluxes, together with Th fluxes and POC/234Th ratios. Covering all the global ocean, classified in 13 regions, season and moment of the bloom and calculated at three different depths: i) a fixed depth (100 m) ii) the reference depth in the paper associated to the base of the euphotic zone iii) the 234Th–238U equilibrium depth. To ensure a compilation representative of the global ocean, the dataset were selected using the division areas proposed by the international network JETZON (Joint Exploration of the Twilight Zone Ocean Network); that agreed a division of the oceans in 13 regions based on their contrasted physics and biogeochemical characteristics. The stations from 234Th publications associated to each JETZON region were carefully selected according to their ability to represent regional environmental conditions. Furthermore, station selection was based on essential criteria such as data quality and accessibility, availability of time series, clear definition of export depth, measurements from established programs, e.g. GEOTRACES, and the presence of other additional relevant ancillary data. The data in the compilation are thus organized by region and include geographic coordinates, season, selected export depth, and other key factors (such as a description of the flux evaluation depth or the export depth zone). After 234Th–238U compilation, 234Th fluxes were calculated, when possible, at the three different depths, i), ii) and iii), under the assumption of steady-state conditions, following Le Moigne et al. 2013. Using POC/234Th ratios, POC fluxes are estimated from Th fluxes and both fluxes were included in the repository. POC/234Th ratios were chosen from pump samples, prioritizing particles larger than 53 μm when available. These ratios must be estimated at the flux calculation depth [i), ii) and iii)]. When they were not available at the calculation depth POC/234Th values were interpolated as described in the readme text file. The values of the ratios are included in the repository, specifying the depth at which they were determined and indicating whether they have been interpolated. Similarly, when 234Th, 238U concentrations were not available at the calculation depth, values were interpolated (see readme text file).

Open Research Data

<<<!!!<<< Attention! Data sets are not updated anymore. Please, visit the BonaRes Repositor​ium​ for new datasets. https://www.re3data.org/repository/r3d100013470 >>>!!!>>> Open Research Data provides quality assessed data and their metadata such as context information on measurement objectives, equipment, methods, testing and investigation areas. The purpose of the repository is to secure quality, integrity and long-term availability of landscape and ecosystem research data as well as to enhance accessibility of free data from ZALF long-term monitoring campaigns, landscape laboratories (Agro-ScapeLabs), field trials and experiments. The Leibniz Centre for Agricultural Landscape Research (ZALF) explores ecosystems in agricultural landscapes and the development of ecologically and economically viable land use systems. ZALF combines scientific expertise from agricultural science, geosciences, biosciences and socio-economics.

Global Heat Flow Database Data Template

Since 1963, the International Heat Flow Commission (IHFC | www.ihfc-iugg.org) has been dedicated to providing standards for heat flow measurements and maintaining the Global Heat Flow Database (GHFDB) — a collection of heat flow data from around the world. The first quality framework for heat-flow-density data was proposed by Jessop et al. (1976), reflecting the state of knowledge, measurement techniques, and technical developments at that time. In 2019, the IHFC initiated a major revision of the GHFDB to develop an authenticated and quality-assessed database. This initiative involved multinational working groups and led to a comprehensive update of key parameters affecting heat-flow calculations. These updates included measurement methods for both temperature and thermal conductivity, as well as metadata structures. The new standard for a revised GHFDB structure was developed through a collaborative community approach and published in 2021 (Fuchs et al., 2021). This standard reflected changes in database technology and scientific documentation and served as a template for users submitting data to the GHFDB. It was further developed into the currently valid data and metadata standard in 2023, which also introduced an enhanced quality evaluation framework (Fuchs et al., 2023). The ongoing assessment work and the latest release of the GHFDB (Global Heat Flow Database Assessment Group et al., 2024), along with its frequent use, revealed the need for additional refinements. These refinements were particularly necessary in aspects related to metadata consistency, measurement techniques, and classification criteria. Consequently, further updates were implemented to improve the reliability and applicability of the dataset, ensuring a more robust evaluation of global heat-flow data. Here, we present the 2026.03 version of the GHFDB Data Template. The previous template introduced by Fuchs et al. (2023) has been improved based on the latest data ass6ssment process. The current version of the template incorporates the advancements in data collection methodologies, the IHFC quality evaluation framework, and metadata management, ensuring that data submitted to the GHFDB follows the IHFC standards for the GHFDB. A changelog is available and a summary of changes is also provided in the data descripton file (PDF). To promote open access, the template is also hosted on the official GitHub repository of the IHFC: https://github.com/ihfc-iugg. Users can download both the original version from 2023 and the revised templates. Version 2025.06 is also available in the previous-versions folder of this data publication. Maintaining the GHFDB Data Template in a version-controlled environment ensures transparency regarding changes over time and fosters a documentation style that sets high standards to support the reproducibility of research results. Moreover, it supports a smooth and fast integration of data from the research community into the Global Heat Flow Database of the IHFC.

Höffigkeitsgebiete Sande & Kiessande (Rohstoffverbreitung)

Oberflächennahe Rohstoffverbreitung und erkundete Lagerstätten der Landesfläche M-V und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte A (Rohstoffverbreitung)

Lagerstätten Tonige Rohstoffe (Sicherungswürdigkeit)

Sicherungswürdigkeit der oberflächennahen Rohstoffe der Landesfläche MV und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte D (Sicherungswürdigkeit Rohstoff)

Höffigkeitsgebiete Raseneisenerz(Rohstoffverbreitung)

Oberflächennahe Rohstoffverbreitung und erkundete Lagerstätten der Landesfläche M-V und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte A (Rohstoffverbreitung)

Höffigkeitsgebiete Tonige Rohstoffe(Rohstoffverbreitung)

Oberflächennahe Rohstoffverbreitung und erkundete Lagerstätten der Landesfläche M-V und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte A (Rohstoffverbreitung)

Lagerstätten Sande & Kiessande (Sicherungswürdigkeit)

Sicherungswürdigkeit der oberflächennahen Rohstoffe der Landesfläche MV und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte D (Sicherungswürdigkeit Rohstoff)

Lagerstätten Kalk (Sicherungswürdigkeit)

Sicherungswürdigkeit der oberflächennahen Rohstoffe der Landesfläche MV und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte D (Sicherungswürdigkeit Rohstoff)

Höffigkeitsgebiete Kalke (Rohstoffverbreitung)

Oberflächennahe Rohstoffverbreitung und erkundete Lagerstätten der Landesfläche M-V und des angrenzenden Ostseegrundes im Maßstab 1:50.000 Karte der oberflächennahen Rohstoffe Mecklenburg-Vorpommern Maßstab 1:50.000 - Grundkarte A (Rohstoffverbreitung)

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