Global modeling of tropospheric iodine aerosol

Tomás Sherwen; Mathew John Evans; Lucy Jane Carpenter; Rosemary Jane Chance; D. V. Spracklen; Alex Baker; Johan A. Schmidt; Thomas Breider

doi:10.1002/2016GL070062

Global modeling of tropospheric iodine aerosol

Tomás Sherwen, Mathew John Evans, Lucy Jane Carpenter, Rosemary Jane Chance, D. V. Spracklen, Alex Baker, Johan A. Schmidt, Thomas Breider

Chemistry

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

Abstract

Natural aerosols play a central role in the Earth system. The conversion of dimethyl sulfide to sulfuric acid is the dominant source of oceanic secondary aerosol. Ocean emitted iodine can also produce aerosol. Using a GEOS-Chem model, we present a simulation of iodine aerosol. The simulation compares well with the limited observational data set. Iodine aerosol concentrations are highest in the tropical marine boundary layer (MBL) averaging 5.2 ng (I) m ⁻³ with monthly maximum concentrations of 90 ng (I) m ⁻³. These masses are small compared to sulfate (0.75% of MBL burden, up to 11% regionally) but are more significant compared to dimethyl sulfide sourced sulfate (3% of the MBL burden, up to 101% regionally). In the preindustrial, iodine aerosol makes up 0.88% of the MBL burden sulfate mass and regionally up to 21%. Iodine aerosol may be an important regional mechanism for ocean-atmosphere interaction.

Original language	English
Pages (from-to)	10012-10019
Number of pages	8
Journal	Geophysical Research Letters
Volume	43
Issue number	18
Early online date	4 Sept 2016
DOIs	https://doi.org/10.1002/2016GL070062
Publication status	Published - 28 Sept 2016

Bibliographical note

Keywords

DMS
aerosol
dimethyl sulfide
iodine
marine boundary layer
sulfate

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10.1002/2016GL070062Licence: CC BY

Global modelling of tropospheric iodine aerosol
© 2016 American Geophysical Union.
Accepted author manuscript, 1.47 MBLicence: CC BY
Sherwen_et_al-2016-Geophysical_Research_Letters
©2016. The Authors.
Final published version, 1.11 MBLicence: CC BY

Cite this

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title = "Global modeling of tropospheric iodine aerosol",

abstract = "Natural aerosols play a central role in the Earth system. The conversion of dimethyl sulfide to sulfuric acid is the dominant source of oceanic secondary aerosol. Ocean emitted iodine can also produce aerosol. Using a GEOS-Chem model, we present a simulation of iodine aerosol. The simulation compares well with the limited observational data set. Iodine aerosol concentrations are highest in the tropical marine boundary layer (MBL) averaging 5.2 ng (I) m −3 with monthly maximum concentrations of 90 ng (I) m −3. These masses are small compared to sulfate (0.75% of MBL burden, up to 11% regionally) but are more significant compared to dimethyl sulfide sourced sulfate (3% of the MBL burden, up to 101% regionally). In the preindustrial, iodine aerosol makes up 0.88% of the MBL burden sulfate mass and regionally up to 21%. Iodine aerosol may be an important regional mechanism for ocean-atmosphere interaction. ",

keywords = "DMS, aerosol, dimethyl sulfide, iodine, marine boundary layer, sulfate",

author = "Tom{\'a}s Sherwen and Evans, {Mathew John} and Carpenter, {Lucy Jane} and Chance, {Rosemary Jane} and Spracklen, {D. V.} and Alex Baker and Schmidt, {Johan A.} and Thomas Breider",

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TY - JOUR

T1 - Global modeling of tropospheric iodine aerosol

AU - Sherwen, Tomás

AU - Evans, Mathew John

AU - Carpenter, Lucy Jane

AU - Chance, Rosemary Jane

AU - Spracklen, D. V.

AU - Baker, Alex

AU - Schmidt, Johan A.

AU - Breider, Thomas

PY - 2016/9/28

Y1 - 2016/9/28

N2 - Natural aerosols play a central role in the Earth system. The conversion of dimethyl sulfide to sulfuric acid is the dominant source of oceanic secondary aerosol. Ocean emitted iodine can also produce aerosol. Using a GEOS-Chem model, we present a simulation of iodine aerosol. The simulation compares well with the limited observational data set. Iodine aerosol concentrations are highest in the tropical marine boundary layer (MBL) averaging 5.2 ng (I) m −3 with monthly maximum concentrations of 90 ng (I) m −3. These masses are small compared to sulfate (0.75% of MBL burden, up to 11% regionally) but are more significant compared to dimethyl sulfide sourced sulfate (3% of the MBL burden, up to 101% regionally). In the preindustrial, iodine aerosol makes up 0.88% of the MBL burden sulfate mass and regionally up to 21%. Iodine aerosol may be an important regional mechanism for ocean-atmosphere interaction.

AB - Natural aerosols play a central role in the Earth system. The conversion of dimethyl sulfide to sulfuric acid is the dominant source of oceanic secondary aerosol. Ocean emitted iodine can also produce aerosol. Using a GEOS-Chem model, we present a simulation of iodine aerosol. The simulation compares well with the limited observational data set. Iodine aerosol concentrations are highest in the tropical marine boundary layer (MBL) averaging 5.2 ng (I) m −3 with monthly maximum concentrations of 90 ng (I) m −3. These masses are small compared to sulfate (0.75% of MBL burden, up to 11% regionally) but are more significant compared to dimethyl sulfide sourced sulfate (3% of the MBL burden, up to 101% regionally). In the preindustrial, iodine aerosol makes up 0.88% of the MBL burden sulfate mass and regionally up to 21%. Iodine aerosol may be an important regional mechanism for ocean-atmosphere interaction.

KW - DMS

KW - aerosol

KW - dimethyl sulfide

KW - iodine

KW - marine boundary layer

KW - sulfate

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U2 - 10.1002/2016GL070062

DO - 10.1002/2016GL070062

M3 - Article

SN - 0094-8276

VL - 43

SP - 10012

EP - 10019

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 18

ER -

Global modeling of tropospheric iodine aerosol

Abstract

Bibliographical note

Keywords

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Other files and links

Lucy Jane Carpenter

Mathew John Evans

Talk: Oceanic controls of atmospheric photochemistry

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Global modeling of tropospheric iodine aerosol

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Profiles

Lucy Jane Carpenter

Mathew John Evans

Activities

Talk: Oceanic controls of atmospheric photochemistry

Cite this