INVESTIGADORES
MONTES Maria Luciana
artículos
Título:
Low source-inherited iron solubility limits fertilization potential of South American dust
Autor/es:
SIMONELLA, L; COSENTINO, N.J; MONTES M.L.; CROOT P.L; PALOMEQUE M.E; GAIERO, D.M
Revista:
GEOCHIMICA ET COSMOCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2022 vol. 10
ISSN:
0016-7037
Resumen:
Where atmospheric processing is weak due to low anthropogenic emissions, fertilization of iron-limited oceans by non-volcanic mineral dust aerosols strongly depends on iron solubility at the sources. Southern South America (SSA) is a pristine environment and the main dust supplier to the southern oceans, the most sensitive to iron fertilization. Thus, the present-day lack of SSA dust fertilization of the southern oceans is hypothesized to reflect low source-inherited iron bioavailability. However, a dearth of geochemical studies on SSA dust prevents testing this hypothesis. To remedy this, we conducted the first systematic sampling of SSA dust sources. Iron leaching experiments showed fractional solubilities of close-to-source dust (bulk) and dust-emitting surface sediments (
