Long-range transport of dust enhances oceanic iron bioavailability

Autor: Bridget Kenlee, Jeremy D. Owens, Robert Raiswell, Simon W. Poulton, Silke Severmann, Peter M. Sadler, Timothy W. Lyons

Publikováno v: Frontiers in Marine Science, Vol 11 (2024)

Wind-borne dust supply of iron (Fe) to the oceans plays a crucial role in Earth’s biogeochemical cycles. Iron, a limiting micronutrient for phytoplankton growth, is fundamental in regulating ocean primary productivity and in turn the global carbon

Externí odkaz: https://doaj.org/article/be97d2356a6f43a7ba3f0f5df87ccf3a

Globally elevated chemical weathering rates beneath glaciers

Autor: Xiangying Li, Ninglian Wang, Yongjian Ding, Jon R. Hawkings, Jacob C. Yde, Robert Raiswell, Jintao Liu, Shiqiang Zhang, Shichang Kang, Rongjun Wang, Qiao Liu, Shiyin Liu, Roland Bol, Xiaoni You, Guoyu Li

Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-13 (2022)

Global glacial chemical denudation is one of the largest contributors to global elemental cycles and, amplified by climate warming, will significantly impact nutrient loads in downstream ecosystems.

Externí odkaz: https://doaj.org/article/2cb19bf506a74798b88659a3791a4edd

Iron in Glacial Systems: Speciation, Reactivity, Freezing Behavior, and Alteration During Transport

Autor: Robert Raiswell, Jon Hawkings, Amira Elsenousy, Ros Death, Martyn Tranter, Jemma Wadham

Publikováno v: Frontiers in Earth Science, Vol 6 (2018)

A more insightful view of iron in glacial systems requires consideration of iron speciation and mineralogy, the potential for iron minerals to undergo weathering in ice-water environments, the impact of freezing on concentration and speciation, and p

Externí odkaz: https://doaj.org/article/2aae7b8cfd9649a5a7f2fef3e2ce3dd7

The formation mechanisms of sedimentary pyrite nodules determined by trace element and sulfur isotope microanalysis

Autor: John Cliff, Daniel D. Gregory, Ross R. Large, Janaína N. Ávila, Leonid V. Danyushevsky, Paul Olin, Valeriy V. Maslennikov, Timothy W. Lyons, Stephanie L. Olson, Trevor Ireland, Aleksandr S. Stepanov, Robert Raiswell, Indrani Mukherjee

Publikováno v: Geochimica et Cosmochimica Acta. 259:53-68

Redox sensitive trace elements in pyrite, including nodules, are increasingly used to infer the chemical conditions of ancient oceans - but considerable uncertainty remains regarding the mechanism and timing of nodule formation. Resolving these uncer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41014bb507806fd0af0082511a074b33
https://doi.org/10.1016/j.gca.2019.05.035

Biolabile ferrous iron bearing nanoparticles in glacial sediments

Autor: Robert Raiswell, Jon R. Hawkings, Jemma L. Wadham, Majid Kazemian Abyaneh, Liane G. Benning, Anthony Stockdale, Tohru Araki, Burkhard Kaulich, Martyn Tranter, Monika Koch-Müller

Publikováno v: Earth and Planetary Science Letters
Hawkings, J R, Benning, L G, Raiswell, R, Kaulich, B, Araki, T, Abyaneh, M, Stockdale, A, Koch-Müller, M, Wadham, J L & Tranter, M 2018, ' Biolabile ferrous iron bearing nanoparticles in glacial sediments ', Earth and Planetary Science Letters, vol. 493, pp. 92-101 . https://doi.org/10.1016/j.epsl.2018.04.022

Glaciers and ice sheets are a significant source of nanoparticulate Fe, which is potentially important in sustaining the high productivity observed in the near-coastal regions proximal to terrestrial ice cover. However, the bioavailability of particu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d29d3eff42a2914b99bbed213e94c0d
https://doi.org/10.1016/j.epsl.2018.04.022