An Arctic Strait of Two Halves: The Changing Dynamics of Nutrient Uptake and Limitation Across the Fram Strait
| العنوان: | An Arctic Strait of Two Halves: The Changing Dynamics of Nutrient Uptake and Limitation Across the Fram Strait |
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| المؤلفون: | Antonia Doncila, Pearse J. Buchanan, Ian Salter, Claire Mahaffey, Kai U. Ludwichowski, Paul A. Dodd, Alessandro Tagliabue, Jo Hopkins, Camille de la Vega, Robyn E. Tuerena, Raja S. Ganeshram, Louisa Norman, Wilken-Jon von Appen, Martin Graeve |
| المصدر: | EPIC3Global Biogeochemical Cycles, Wiley Online Library Tuerena, R E, Hopkins, J, Buchanan, P J, Ganeshram, R S, Norman, L, W-jvon-appen, Tagliabue, A, Doncila, A, Graeve, M, Ludwichowski, K, Dodd, P A, Vega, C D L, Salter, I & Mahaffey, C 2021, ' An Arctic strait of two halves: The changing dynamics of nutrient uptake and limitation across the Fram Strait ', Global Biogeochemical Cycles . https://doi.org/10.1029/2021GB006961 |
| بيانات النشر: | American Geophysical Union (AGU), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, Atmospheric Science, Global and Planetary Change, Water mass, 010504 meteorology & atmospheric sciences, 010604 marine biology & hydrobiology, Climate change, 01 natural sciences, chemistry.chemical_compound, Nutrient, Oceanography, Arctic, Nitrate, chemistry, 13. Climate action, Environmental Chemistry, Environmental science, 14. Life underwater, 0105 earth and related environmental sciences, General Environmental Science |
| الوصف: | The hydrography of the Arctic Seas is being altered by ongoing climate change, with knock-on effects to nutrient dynamics and primary production. As the major pathway of exchange between the Arctic and the Atlantic, the Fram Strait hosts two distinct water masses in the upper water column, northward flowing warm and saline Atlantic Waters in the east, and southward flowing cold and fresh Polar Surface Water in the west. Here, we assess how physical processes control nutrient dynamics in the Fram Strait using nitrogen isotope data collected during 2016 and 2018. In Atlantic Waters, a weakly stratified water column and a shallow nitracline reduce nitrogen limitation. To the west, in Polar Surface Water, nitrogen limitation is greater because stronger stratification inhibits nutrient resupply from deeper water and lateral nitrate supply from central Arctic waters is low. A historical hindcast simulation of ocean biogeochemistry from 1970 to 2019 corroborates these findings and highlights a strong link between nitrate supply to Atlantic Waters and the depth of winter mixing, which shoaled during the simulation in response to a local reduction in sea-ice formation. Overall, we find that while the eastern Fram Strait currently experiences seasonal nutrient replenishment and high primary production, the loss of winter sea ice and continued atmospheric warming has the potential to inhibit deep winter mixing and limit primary production in the future. |
| وصف الملف: | application/pdf; text |
| تدمد: | 1944-9224 0886-6236 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::120b185a7d357a57cca689a0eb01e374 https://doi.org/10.1029/2021gb006961 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....120b185a7d357a57cca689a0eb01e374 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19449224 08866236 |
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