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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Radium tracing nutrient inputs through submarine groundwater discharge in the global ocean
Scientific Reports, Vol.8(1), pp.1-7
05/02/2018
PMCID: PMC5799265
PMID: 29403050
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Source: InCites
Abstract
Riverine and atmospheric inputs are often considered as the main terrestrial sources of dissolved inorganic nitrogen (DIN), phosphorus (DIP), and silicon (DSi) in the ocean. However, the fluxes of nutrients via submarine groundwater discharge (SGD) often exceed riverine inputs in different local and regional scale settings. In this study, we provide a first approximation of global nutrient fluxes to the ocean via total SGD, including pore water fluxes, by combining a global compilation of nutrient concentrations in groundwater and the SGD-derived 228Ra fluxes. In order to avoid overestimations in calculating SGD-derived nutrient fluxes, the endmember value of nutrients in global groundwater was chosen from saline groundwater samples (salinity >10) which showed relatively lower values over all regions. The results show that the total SGD-derived fluxes of DIN, DIP, and DSi could be approximately 1.4-, 1.6-, and 0.7-fold of the river fluxes to the global ocean (Indo-Pacific and Atlantic Oceans), respectively. Although significant portions of these SGD-derived nutrient fluxes are thought to be recycled within sediment-aquifer systems over various timescales, SGD-derived nutrient fluxes should be included in the global ocean budget in order to better understand dynamic interactions at the land-ocean interface.
Details
- Title
- Radium tracing nutrient inputs through submarine groundwater discharge in the global ocean
- Creators
- Hyung-Mi Cho - Seoul National UniversityGuebuem Kim - Seoul National UniversityEun Young Kwon - Pusan National UniversityNils Moosdorf - Leibniz Centre for Tropical Marine ResearchJordi Garcia-Orellana - Universitat Autònoma de BarcelonaIsaac R Santos - Southern Cross University
- Publication Details
- Scientific Reports, Vol.8(1), pp.1-7
- Publisher
- Nature Publishing Group; England
- Grant note
- This work is supported by the National Research Foundation (NRF) of Korea (NRF-2015R1A2A1A10054309) funded by the Korean government. Support provided by the Generalitat de Catalunya to MERS (2014 SGR – 1356) is also acknowledged.
- Identifiers
- 991012925679102368
- Copyright
- © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Academic Unit
- Science; National Marine Science Centre; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article