Wind-driven upwelling of iron sustains dense blooms and food webs in the eastern Weddell Gyre
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2023 |
| Auteurs (31) | : | MOREAU Sebastien HATTERMANN Tore DE STEUR Laura KAUKO Hanna,maria AHONEN Heidi ARDELAN Murat ASSMY P CHIERICI Melissa DESCAMPS Sebastien DINTER T FALKENHAUG Tone FRANSSON Agneta GRØNNINGSÆTER Eirik HALLFREDSSON Elvar,h HUHN Oliver LEBRUN Anais LOWTHER Andrew LÜBCKER Nico MONTEIRO P PEEKEN Ilka ROYCHOUDHURY Alakendra RÓŻAŃSKA Magdalena RYAN-KEOGH Thomas,j SANCHEZ Nicolas SINGH Arvind SIMONSEN Jan,henrik STEIGER Nadine THOMALLA Sandy VAN TONDER Andre WIKTOR Jozef STEEN Harald |
| Revue scientifique | : | Nature Communications |
| Volume | : | 14 |
| Fascicule | : | 1 |
| Pages | : | |
| DOI | : | 10.1038/s41467-023-36992-1 |
| URL | : | https://doi.org/10.1038/s41467-023-36992-1 |
| Abstract | : | The Southern Ocean is a major sink of anthropogenic CO2 and an important foraging area for top trophic level consumers. However, iron limitation sets an upper limit to primary productivity. Here we report on a considerably dense late summer phytoplankton bloom spanning 9000 km2 in the open ocean of the eastern Weddell Gyre. Over its 2.5 months duration, the bloom accumulated up to 20 g C m−2 of organic matter, which is unusually high for Southern Ocean open waters. We show that, over 1997–2019, this open ocean bloom was likely driven by anomalies in easterly winds that push sea ice southwards and favor the upwelling of Warm Deep Water enriched in hydrothermal iron and, possibly, other iron sources. This recurring open ocean bloom likely facilitates enhanced carbon export and sustains high standing stocks of Antarctic krill, supporting feeding hot spots for marine birds and baleen whales. |
| Mots-clés | : | - |
| Commentaire | : | - |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Moreau S, Hattermann T, De Steur L, Kauko HM, Ahonen H, Ardelan M, Assmy P, Chierici M, Descamps S, Dinter T, Falkenhaug T, Fransson A, Grønningsæter E, Hallfredsson EH, Huhn O, Lebrun A, Lowther A, Lübcker N, Monteiro P, Peeken I, Roychoudhury A, Różańska M, Ryan-Keogh TJ, Sanchez N, Singh A, Simonsen JH, Steiger N, Thomalla S, Van Tonder A, Wiktor J, Steen H (2023) Wind-driven upwelling of iron sustains dense blooms and food webs in the eastern Weddell Gyre. Nat Commun 14 | doi: 10.1038/s41467-023-36992-1
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