Comparing the Importance of Iodine and Isoprene on Tropospheric Photochemistry

R. J. Pound; D. P. Durcan; M. J. Evans; L. J. Carpenter

doi:10.1029/2022GL100997

Comparing the Importance of Iodine and Isoprene on Tropospheric Photochemistry

R. J. Pound^*, D. P. Durcan, M. J. Evans, L. J. Carpenter

^*Corresponding author for this work

Chemistry

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

Abstract

Isoprene, arguably the most studied biogenically emitted gas, is thought to have a large impact on tropospheric composition. Other naturally emitted species have been considered to play a less important role. Here the GEOS-Chem model is used to compare the impacts of isoprene and iodine emissions on present-day tropospheric composition. Removing isoprene emissions leads to a 3.4 burden, a smaller absolute change than the 5.9+0.60.05 whereas isoprene has a substantial impact on both (−4.34.2. Isoprene emissions and chemistry are seen as essential for tropospheric chemistry models, but iodine is often not. We suggest that iodine should receive greater attention in model development and experimental research to allow improved predictions of past, present, and future tropospheric O3.

Original language	English
Article number	e2022GL100997
Number of pages	11
Journal	Geophysical Research Letters
Volume	50
Issue number	8
Early online date	25 Apr 2023
DOIs	https://doi.org/10.1029/2022GL100997
Publication status	Published - 28 Apr 2023

Bibliographical note

Keywords

iodine
isoprene
ozone
natural emissions

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10.1029/2022GL100997Licence: CC BY

Geophysical Research Letters - 2023 - Pound - Comparing the Importance of Iodine and Isoprene on Tropospheric
© 2023, The Authors.
Final published version, 2.6 MBLicence: CC BY

O3-SML: Ozone dry deposition to the sea surface microlayer
Carpenter, L. J. (Principal investigator), Evans, M. J. (Co-investigator), Hughes, C. (Co-investigator) & Lee, J. D. (Co-investigator)
EUROPEAN COMMISSION
1/10/19 → 30/09/25
Project: Research project (funded) › Research

Cite this

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title = "Comparing the Importance of Iodine and Isoprene on Tropospheric Photochemistry",

abstract = "Isoprene, arguably the most studied biogenically emitted gas, is thought to have a large impact on tropospheric composition. Other naturally emitted species have been considered to play a less important role. Here the GEOS-Chem model is used to compare the impacts of isoprene and iodine emissions on present-day tropospheric composition. Removing isoprene emissions leads to a 3.4 burden, a smaller absolute change than the 5.9+0.60.05 whereas isoprene has a substantial impact on both (−4.34.2. Isoprene emissions and chemistry are seen as essential for tropospheric chemistry models, but iodine is often not. We suggest that iodine should receive greater attention in model development and experimental research to allow improved predictions of past, present, and future tropospheric O3.",

keywords = "iodine, isoprene, ozone, natural emissions",

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T1 - Comparing the Importance of Iodine and Isoprene on Tropospheric Photochemistry

AU - Pound, R. J.

AU - Durcan, D. P.

AU - Evans, M. J.

AU - Carpenter, L. J.

PY - 2023/4/28

Y1 - 2023/4/28

N2 - Isoprene, arguably the most studied biogenically emitted gas, is thought to have a large impact on tropospheric composition. Other naturally emitted species have been considered to play a less important role. Here the GEOS-Chem model is used to compare the impacts of isoprene and iodine emissions on present-day tropospheric composition. Removing isoprene emissions leads to a 3.4 burden, a smaller absolute change than the 5.9+0.60.05 whereas isoprene has a substantial impact on both (−4.34.2. Isoprene emissions and chemistry are seen as essential for tropospheric chemistry models, but iodine is often not. We suggest that iodine should receive greater attention in model development and experimental research to allow improved predictions of past, present, and future tropospheric O3.

AB - Isoprene, arguably the most studied biogenically emitted gas, is thought to have a large impact on tropospheric composition. Other naturally emitted species have been considered to play a less important role. Here the GEOS-Chem model is used to compare the impacts of isoprene and iodine emissions on present-day tropospheric composition. Removing isoprene emissions leads to a 3.4 burden, a smaller absolute change than the 5.9+0.60.05 whereas isoprene has a substantial impact on both (−4.34.2. Isoprene emissions and chemistry are seen as essential for tropospheric chemistry models, but iodine is often not. We suggest that iodine should receive greater attention in model development and experimental research to allow improved predictions of past, present, and future tropospheric O3.

KW - iodine

KW - isoprene

KW - ozone

KW - natural emissions

U2 - 10.1029/2022GL100997

DO - 10.1029/2022GL100997

M3 - Article

SN - 0094-8276

VL - 50

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 8

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ER -

Comparing the Importance of Iodine and Isoprene on Tropospheric Photochemistry

Abstract

Bibliographical note

Keywords

Access to Document

Projects

O3-SML: Ozone dry deposition to the sea surface microlayer

Cite this