Iron solubility in crustal and anthropogenic aerosols: The Eastern Mediterranean as a case study

M. J.M. Séguret; M. Koçak; C. Theodosi; S. J. Ussher; P. J. Worsfold; B. Herut; N. Mihalopoulos; N. Kubilay; M. Nimmo

doi:10.1016/j.marchem.2011.05.007

Iron solubility in crustal and anthropogenic aerosols: The Eastern Mediterranean as a case study

M. J.M. Séguret, M. Koçak, C. Theodosi, S. J. Ussher, P. J. Worsfold, B. Herut, N. Mihalopoulos, N. Kubilay, M. Nimmo

Research output: Contribution to journal › Article › peer-review

Abstract

We report seawater dissolution experiments for aerosol samples simultaneously collected (October 2007) across the Levantine Basin (LB, Eastern Mediterranean Sea), a marine system influenced by seasonal atmospheric inputs. Two distinct populations exhibited contrasting kinetic profiles; those representative of strong Saharan dust events which had variable iron release profiles with a maximum solubility of 0.94±1.48% (1 s.d.) whereas those which had a relatively greater anthropogenic influence had consistent profiles (fast release, ≤2 h, of dissolved iron in seawater followed by removal) with a maximum solubility of 11.5±9.3% (1 s.d.). First estimates of atmospheric fluxes of soluble iron are presented, ranging from 8.64±10.76mgm^-2y^-1 for the Northern LB to 6.48±7.78mgm^-2y^-1 for the Southern LB. Estimates of Fe fluxes to oceanic basins are important for constraining the global iron budget, and dust dissolution kinetic profiles provide information on the mechanisms involved during the release of aerosol Fe in seawater post atmospheric deposition.

Original language	English
Pages (from-to)	229-238
Number of pages	10
Journal	Marine Chemistry
Volume	126
Issue number	1-4
DOIs	https://doi.org/10.1016/j.marchem.2011.05.007
State	Published - 20 Sep 2011
Externally published	Yes

Bibliographical note

Funding Information:
We gratefully acknowledge Dr M. Rijkenberg and Prof E. Achterberg for the collection of the seawater and the determination of total Fe complexing ligands. We gratefully acknowledge the two anonymous reviewers for their critical comments and suggestions. The authors acknowledge the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and/or READY website ( http://www.arl.noaa.gov/ready.html ) used in this publication. This work was supported by NATO (NATO CLG 982862 ).

Keywords

Aerosol iron
Dissolution
FI-CL
Kinetic
Levantine Basin

ASJC Scopus subject areas

Oceanography
Environmental Chemistry
General Chemistry
Water Science and Technology

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10.1016/j.marchem.2011.05.007

Cite this

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title = "Iron solubility in crustal and anthropogenic aerosols: The Eastern Mediterranean as a case study",

abstract = "We report seawater dissolution experiments for aerosol samples simultaneously collected (October 2007) across the Levantine Basin (LB, Eastern Mediterranean Sea), a marine system influenced by seasonal atmospheric inputs. Two distinct populations exhibited contrasting kinetic profiles; those representative of strong Saharan dust events which had variable iron release profiles with a maximum solubility of 0.94±1.48% (1 s.d.) whereas those which had a relatively greater anthropogenic influence had consistent profiles (fast release, ≤2 h, of dissolved iron in seawater followed by removal) with a maximum solubility of 11.5±9.3% (1 s.d.). First estimates of atmospheric fluxes of soluble iron are presented, ranging from 8.64±10.76mgm-2y-1 for the Northern LB to 6.48±7.78mgm-2y-1 for the Southern LB. Estimates of Fe fluxes to oceanic basins are important for constraining the global iron budget, and dust dissolution kinetic profiles provide information on the mechanisms involved during the release of aerosol Fe in seawater post atmospheric deposition.",

keywords = "Aerosol iron, Dissolution, FI-CL, Kinetic, Levantine Basin",

author = "S{\'e}guret, {M. J.M.} and M. Ko{\c c}ak and C. Theodosi and Ussher, {S. J.} and Worsfold, {P. J.} and B. Herut and N. Mihalopoulos and N. Kubilay and M. Nimmo",

note = "Funding Information: We gratefully acknowledge Dr M. Rijkenberg and Prof E. Achterberg for the collection of the seawater and the determination of total Fe complexing ligands. We gratefully acknowledge the two anonymous reviewers for their critical comments and suggestions. The authors acknowledge the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and/or READY website ( http://www.arl.noaa.gov/ready.html ) used in this publication. This work was supported by NATO (NATO CLG 982862 ).",

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doi = "10.1016/j.marchem.2011.05.007",

language = "English",

volume = "126",

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journal = "Marine Chemistry",

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T1 - Iron solubility in crustal and anthropogenic aerosols

T2 - The Eastern Mediterranean as a case study

AU - Séguret, M. J.M.

AU - Koçak, M.

AU - Theodosi, C.

AU - Ussher, S. J.

AU - Worsfold, P. J.

AU - Herut, B.

AU - Mihalopoulos, N.

AU - Kubilay, N.

AU - Nimmo, M.

N1 - Funding Information: We gratefully acknowledge Dr M. Rijkenberg and Prof E. Achterberg for the collection of the seawater and the determination of total Fe complexing ligands. We gratefully acknowledge the two anonymous reviewers for their critical comments and suggestions. The authors acknowledge the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and/or READY website ( http://www.arl.noaa.gov/ready.html ) used in this publication. This work was supported by NATO (NATO CLG 982862 ).

PY - 2011/9/20

Y1 - 2011/9/20

N2 - We report seawater dissolution experiments for aerosol samples simultaneously collected (October 2007) across the Levantine Basin (LB, Eastern Mediterranean Sea), a marine system influenced by seasonal atmospheric inputs. Two distinct populations exhibited contrasting kinetic profiles; those representative of strong Saharan dust events which had variable iron release profiles with a maximum solubility of 0.94±1.48% (1 s.d.) whereas those which had a relatively greater anthropogenic influence had consistent profiles (fast release, ≤2 h, of dissolved iron in seawater followed by removal) with a maximum solubility of 11.5±9.3% (1 s.d.). First estimates of atmospheric fluxes of soluble iron are presented, ranging from 8.64±10.76mgm-2y-1 for the Northern LB to 6.48±7.78mgm-2y-1 for the Southern LB. Estimates of Fe fluxes to oceanic basins are important for constraining the global iron budget, and dust dissolution kinetic profiles provide information on the mechanisms involved during the release of aerosol Fe in seawater post atmospheric deposition.

AB - We report seawater dissolution experiments for aerosol samples simultaneously collected (October 2007) across the Levantine Basin (LB, Eastern Mediterranean Sea), a marine system influenced by seasonal atmospheric inputs. Two distinct populations exhibited contrasting kinetic profiles; those representative of strong Saharan dust events which had variable iron release profiles with a maximum solubility of 0.94±1.48% (1 s.d.) whereas those which had a relatively greater anthropogenic influence had consistent profiles (fast release, ≤2 h, of dissolved iron in seawater followed by removal) with a maximum solubility of 11.5±9.3% (1 s.d.). First estimates of atmospheric fluxes of soluble iron are presented, ranging from 8.64±10.76mgm-2y-1 for the Northern LB to 6.48±7.78mgm-2y-1 for the Southern LB. Estimates of Fe fluxes to oceanic basins are important for constraining the global iron budget, and dust dissolution kinetic profiles provide information on the mechanisms involved during the release of aerosol Fe in seawater post atmospheric deposition.

KW - Aerosol iron

KW - Dissolution

KW - FI-CL

KW - Kinetic

KW - Levantine Basin

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JO - Marine Chemistry

JF - Marine Chemistry

IS - 1-4

ER -

Iron solubility in crustal and anthropogenic aerosols: The Eastern Mediterranean as a case study

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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