https://hdl.handle.net/20.500.12085/59977a36-e8e7-4348-a4e8-2b13f3913590@metadata eng utf8 series GEOMAR Helmholtz Centre for Ocean Research Kiel datamanagement@geomar.de https://ror.org/02h2x0161 WWW:LINK web browser information pointOfContact 2021-05-12T09:17:22 ISO19115 Supplementary Data to "Riverine nitrogen supply to the global ocean and its limited impact on global marine primary production: a feedback study using an Earth System Model" 2021-10-01 publication https://hdl.handle.net/20.500.12085/59977a36-e8e7-4348-a4e8-2b13f3913590 Tivig, Miriam originator Keller, David P. https://orcid.org/0000-0002-7546-4614 WWW:LINK web browser information originator Oschlies, Andreas https://orcid.org/0000-0002-8295-4013 WWW:LINK web browser information originator A common notion is that negative feedbacks stabilize the natural marine nitrogen inventory. Recent modeling studies have shown, however, some potential for localized positive feedbacks leading to substantial nitrogen losses in regions where nitrogen fixation and denitrification occur in proximity to each other. Here we include dissolved nitrogen from river discharge in a global 3-D ocean biogeochemistry model and study the effects on near-coastal and remote-open-ocean biogeochemistry. We find that at a steady state the biogeochemical feedbacks in the marine nitrogen cycle, nitrogen input from biological N2 fixation, and nitrogen loss via denitrification mostly compensate for the imposed yearly addition of 22.8 to 45.6 Tg of riverine nitrogen and limit the impact on global marine productivity to < 2 %. Global experiments that regionally isolate river nutrient input show that the sign and strength of the feedbacks depend on the location of the river discharge and the oxygen status of the receiving marine environment. Marine productivity generally increases in proximity to the nitrogen input, but we also find a decline in productivity in the modeled Bay of Bengal and near the mouth of the Amazon River. While most of the changes are located in shelf and near-coastal oceans, nitrogen supply from the rivers can impact the open ocean, due to feedbacks or knock-on effects. GEOMAR Helmholtz Centre for Ocean Research Kiel datamanagement@geomar.de pointOfContact nitrogen marine primary production life in the ocean Sea regions GEMET - INSPIRE themes, version 1.0 GEMET 2008-06-01 publication otherRestrictions conditions to access and use unknown otherRestrictions no limitations to public access http://dx.doi.org/10.5194/bg-18-5327-2021 largerWorkCitation collection COMFORT largerWorkCitation project SFB754 largerWorkCitation project OceanNETs largerWorkCitation project Opendap largerWorkCitation project eng oceans geoscientificInformation oceanrep_eprintid: 52597\noceanrep_eprint_status: archive\noceanrep_lastmod: 2021-10-06 08:36:40\noceanrep_status_changed: 2021-05-12 09:17:22\noceanrep_ispublished: pub\noceanrep_full_text_status: public\noceanrep_publication: Biogeosciences (BG)\noceanrep_volume: 18\noceanrep_pagerange: 5327-5350\noceanrep_refereed: TRUE\noceanrep_issn: 1726-4189\noceanrep_collection: public\noceanrep_open_access: TRUE\noceanrep_oa_article_ref: MS No.: bg-2021-101\noceanrep_fp7_project_id: info:eu-repo/grantAgreement/EC/H2020/820989; info:eu-repo/grantAgreement/EC/H2020/869357)\noceanrep_fp7_type: info:eu-repo/semantics/article\noceanrep_access_rights: info:eu-repo/semantics/openAccess\n https://hdl.handle.net/20.500.12085/59977a36-e8e7-4348-a4e8-2b13f3913590 WWW:LINK information series Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication false Miriam Tivig, David P. Keller, Andreas Oschlies, created the series. notPlanned This metadata document contains metadata from the OAI EP3 export of http://oceanrep.geomar.de/id/eprint/52597. Data quality, in particular completeness, accuracy, precision, consistency and currentness have not been checked, yet.