ArticlePhilosophical transactions. Series A, Mathematical, physical, and engineering sciences2018
A 'shallow bathtub ring' of local sedimentary iron input maintains the Palmer Deep biological hotspot on the West Antarctic Peninsula shelf.
Article in Philosophical transactions. Series A, Mathematical, physical, and engineering sciences, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed.
- Warming substantially amplifies Antarctic coastal polynyas as key carbon sinks.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Tidewater cycle drives alpine glacial sediment plume geochemistry.Nature communications · 2025Article
- Antarctic glaciers export carbon-stabilised iron(II)-rich particles to the surface Southern Ocean.Nature communications · 2025Article
- The contribution of penguin guano to the Southern Ocean iron pool.Nature communications · 2023Article
- Seasonal Dynamics of Dissolved Iron on the Antarctic Continental Shelf: Late-Fall Observations From the Terra Nova Bay and Ross Ice Shelf Polynyas.Journal of geophysical research. Oceans · 2022Article
- Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf.Nature communications · 2019Article
- Ice sheets matter for the global carbon cycle.Nature communications · 2019Review
- Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle.Proceedings. Mathematical, physical, and engineering sciences · 2019Review
- Modeling the Seasonal Cycle of Iron and Carbon Fluxes in the Amundsen Sea Polynya, Antarctica.Journal of geophysical research. Oceans · 2019Article
- Shelf-ocean exchange and hydrography west of the Antarctic Peninsula: a review.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2018Review
- The marine system of the West Antarctic Peninsula: status and strategy for progress.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2018Article
- Spring-summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012-2014.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2018Article
- Evidences of strong sources of DFe and DMn in Ryder Bay, Western Antarctic Peninsula.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2018Article
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5 authors.
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Abstract
Palmer Deep (PD) is one of several regional hotspots of biological productivity along the inner shelf of the West Antarctic Peninsula. The proximity of hotspots to shelf-crossing deep troughs has led to the 'canyon hypothesis', which proposes that circumpolar deep water flowing shoreward along the canyons is upwelled on the inner shelf, carrying nutrients including iron (Fe) to surface waters, maintaining phytoplankton blooms. We present here full-depth profiles of dissolved and particulate Fe and manganese (Mn) from eight stations around PD, sampled in January and early February of 2015 and 2016, allowing the first detailed evaluation of Fe sources to the area's euphotic zone. We show that upwelling of deep water does not control Fe flux to the surface; instead, shallow sediment-sourced Fe inputs are transported horizontally from surrounding coastlines, creating strong vertical gradients of dissolved Fe within the upper 100 m that supply this limiting nutrient to the local ecosystem. The supply of bioavailable Fe is, therefore, not significantly related to the canyon transport of deep water. Near shore time-series samples reveal that local glacial meltwater appears to be an important Mn source but, surprisingly, is not a large direct Fe input to this biological hotspot.This article is part of the theme issue 'The marine system of the West Antarctic Peninsula: status and strategy for progress in a region of rapid change'.
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