The atmospheric iron cycle in EC-earth
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/331015
Tipus de documentText en actes de congrés
Data publicació2020-05
EditorBarcelona Supercomputing Center
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
The ocean is known to act as an atmospheric carbon
dioxide (CO2) sink. About a quarter of the CO2 emitted to the
atmosphere since the industrial revolution, has been captured
by the ocean [1]. The capacity of the ocean to capture CO2
highly depends on ocean productivity which relies upon bioavailable
iron (Fe) for photosynthesis, respiration and nitrogen
fixation [2]. Fe is in fact considered to be the limiting nutrient
in some remote regions of the ocean known as high-nutrient
low-chlorophyll (HNLC) [3]. Understanding and constraining
the bio-available iron supply to the ocean is thus fundamental
to be able to project future climate.
Fe supply reaches the oceans mainly from rivers as suspended
sediment. However, fluvial and glacial particulate Fe is
restricted to near-coastal areas. Therefore, the dominant input
of iron to open ocean surface is the deposition of atmospheric
mineral dust emitted from arid and semiarid areas of the
world. Another contributor to atmospheric Fe supply that is
not always accounted for in models, is combustion, which main
sources are anthropogenic combustion and biomass burning.
Just a fraction of the deposited Fe over ocean can be used
by marine biota as nutrient (bio-available). The assumption
that soluble Fe can be considered as bio-available will be
used here [4]. Freshly emitted Fe-dust is known to be mainly
insoluble. Observations, modelling and laboratory studies suggest
that the solubility of Fe-dust increases downwind of the
sources due to different processes [5] [6]. On the other hand,
although the total burden of emitted combustion Fe is known
to be smaller than Fe-dust, combustion Fe at emission may be
more soluble [7].
CitacióBergas-Massó, E.; Gonçalves Ageitos, M.; Pérez García-Pando, C. The atmospheric iron cycle in EC-earth. A: . Barcelona Supercomputing Center, 2020, p. 45-46.
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
BSC_SODS-20-16_The atmospheric iron.pdf | 149,1Kb | Visualitza/Obre | ||
license_rdf.rdf | 1,203Kb | application/rdf+xml; charset=utf-8 | Visualitza/Obre |