Wilson, Stephanie J., Moody, Amy, McKenzie, Tristan, Cardenas, M. Bayani, Luijendijk, Elco, Sawyer, Audrey H., Wilson, Alicia, Michael, Holly A., Xu, Bochao, Knee, Karen L., Cho, Hyung‐Mi, Weinstein, Yishai, Paytan, Adina, Moosdorf, Nils ORCID: https://orcid.org/0000-0003-2822-8261, Chen, Chen‐Tung Aurthur, Beck, Melanie, Lopez, Cody, Murgulet, Dorina, Kim, Guebuem, Charette, Mathew A., Waska, Hannelore, Ibánhez, J. Severino P., Chaillou, Gwénaëlle, Oehler, Till, Onodera, Shin‐ichi, Saito, Mitsuyo, Rodellas, Valenti, Dimova, Natasha, Montiel, Daniel, Dulai, Henrietta, Richardson, Christina, Du, Jinzhou, Petermann, Eric, Chen, Xiaogang, Davis, Kay L., Lamontagne, Sebastien, Sugimoto, Ryo, Wang, Guizhi, Li, Hailong, Torres, Américo I., Demir, Cansu, Bristol, Emily, Connolly, Craig T., McClelland, James W., Silva, Brenno J., Tait, Douglas, Kumar, BSK, Viswanadham, R., Sarma, VVSS, Silva‐Filho, Emmanoel, Shiller, Alan, Lecher, Alanna, Tamborski, Joseph, Bokuniewicz, Henry, Rocha, Carlos, Reckhardt, Anja, Böttcher, Michael Ernst, Jiang, Shan, Stieglitz, Thomas, Gbewezoun, Houégnon Géraud Vinel, Charbonnier, Céline, Anschutz, Pierre, Hernández‐Terrones, Laura M., Babu, Suresh, Szymczycha, Beata, Sadat‐Noori, Mahmood, Niencheski, Felipe, Null, Kimberly, Tobias, Craig, Song, Bongkeun, Anderson, Iris C. and Santos, Isaac R. (2024) Global subterranean estuaries modify groundwater nutrient loading to the ocean. Limnology and Oceanography Letters . DOI https://doi.org/10.1002/lol2.10390.

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Abstract

Terrestrial groundwater travels through subterranean estuaries before reaching the sea. Groundwater-derived nutrients drive coastal water quality, primary production, and eutrophication. We determined how dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), and dissolved organic nitrogen (DON) are transformed within subterranean estuaries and estimated submarine groundwater discharge (SGD) nutrient loads compiling > 10,000 groundwater samples from 216 sites worldwide. Nutrients exhibited complex, nonconservative behavior in subterranean estuaries. Fresh groundwater DIN and DIP are usually produced, and DON is consumed during transport. Median total SGD (saline and fresh) fluxes globally were 5.4, 2.6, and 0.18 Tmol yr−1 for DIN, DON, and DIP, respectively. Despite large natural variability, total SGD fluxes likely exceed global riverine nutrient export. Fresh SGD is a small source of new nutrients, but saline SGD is an important source of mostly recycled nutrients. Nutrients exported via SGD via subterranean estuaries are critical to coastal biogeochemistry and a significant nutrient source to the oceans.

Document Type:	Article
Programme Area:	PA2
Research affiliation:	Biogeochemistry and Geology > Submarine Groundwater Discharge
Refereed:	Yes
Open Access Journal?:	Yes
DOI:	https://doi.org/10.1002/lol2.10390
ISSN:	2378-2242
Date Deposited:	31 May 2024 09:13
Last Modified:	31 May 2024 09:13
URI:	http://cris.leibniz-zmt.de/id/eprint/5442

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