Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia
The biogenic emissions of isoprene and monoterpenes are one of the main drivers of atmospheric photochemistry, including oxidant and secondary organic aerosol production. In this paper, the emission rates of isoprene and monoterpenes from Australian vegetation are investigated for the first time...
Main Authors: | , , , , , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2016-06-01
|
Series: | Atmospheric Chemistry and Physics |
Online Access: | https://www.atmos-chem-phys.net/16/6997/2016/acp-16-6997-2016.pdf |
id |
doaj-83dea01708824f859a374365cd217978 |
---|---|
record_format |
Article |
spelling |
doaj-83dea01708824f859a374365cd2179782020-11-24T22:08:13ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242016-06-01166997701110.5194/acp-16-6997-2016Current estimates of biogenic emissions from eucalypts uncertain for southeast AustraliaK. M. Emmerson0I. E. Galbally1A. B. Guenther2C. Paton-Walsh3E.-A. Guerette4M. E. Cope5M. D. Keywood6S. J. Lawson7S. B. Molloy8E. Dunne9M. Thatcher10T. Karl11S. D. Maleknia12CSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaDepartment of Earth System Science, University of California, Irvine, USACentre for Atmospheric Chemistry, School of Chemistry, University of Wollongong, Wollongong, NSW, AustraliaCentre for Atmospheric Chemistry, School of Chemistry, University of Wollongong, Wollongong, NSW, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaCSIRO Oceans & Atmosphere, PMB1, Aspendale, VIC, AustraliaInstitute of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, AustriaCentre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, AustraliaThe biogenic emissions of isoprene and monoterpenes are one of the main drivers of atmospheric photochemistry, including oxidant and secondary organic aerosol production. In this paper, the emission rates of isoprene and monoterpenes from Australian vegetation are investigated for the first time using the Model of Emissions of Gases and Aerosols from Nature version 2.1 (MEGANv2.1); the CSIRO chemical transport model; and atmospheric observations of isoprene, monoterpenes and isoprene oxidation products (methacrolein and methyl vinyl ketone). Observations from four field campaigns during three different seasons are used, covering urban, coastal suburban and inland forest areas. The observed concentrations of isoprene and monoterpenes were of a broadly similar magnitude, which may indicate that southeast Australia holds an unusual position where neither chemical species dominates. The model results overestimate the observed atmospheric concentrations of isoprene (up to a factor of 6) and underestimate the monoterpene concentrations (up to a factor of 4). This may occur because the emission rates currently used in MEGANv2.1 for Australia are drawn mainly from young eucalypt trees (< 7 years), which may emit more isoprene than adult trees. There is no single increase/decrease factor for the emissions which suits all seasons and conditions studied. There is a need for further field measurements of in situ isoprene and monoterpene emission fluxes in Australia.https://www.atmos-chem-phys.net/16/6997/2016/acp-16-6997-2016.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
K. M. Emmerson I. E. Galbally A. B. Guenther C. Paton-Walsh E.-A. Guerette M. E. Cope M. D. Keywood S. J. Lawson S. B. Molloy E. Dunne M. Thatcher T. Karl S. D. Maleknia |
spellingShingle |
K. M. Emmerson I. E. Galbally A. B. Guenther C. Paton-Walsh E.-A. Guerette M. E. Cope M. D. Keywood S. J. Lawson S. B. Molloy E. Dunne M. Thatcher T. Karl S. D. Maleknia Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia Atmospheric Chemistry and Physics |
author_facet |
K. M. Emmerson I. E. Galbally A. B. Guenther C. Paton-Walsh E.-A. Guerette M. E. Cope M. D. Keywood S. J. Lawson S. B. Molloy E. Dunne M. Thatcher T. Karl S. D. Maleknia |
author_sort |
K. M. Emmerson |
title |
Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia |
title_short |
Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia |
title_full |
Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia |
title_fullStr |
Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia |
title_full_unstemmed |
Current estimates of biogenic emissions from eucalypts uncertain for southeast Australia |
title_sort |
current estimates of biogenic emissions from eucalypts uncertain for southeast australia |
publisher |
Copernicus Publications |
series |
Atmospheric Chemistry and Physics |
issn |
1680-7316 1680-7324 |
publishDate |
2016-06-01 |
description |
The biogenic emissions of isoprene and monoterpenes are one of the main
drivers of atmospheric photochemistry, including oxidant and secondary
organic aerosol production. In this paper, the emission rates of isoprene and
monoterpenes from Australian vegetation are investigated for the first time
using the Model of Emissions of Gases and Aerosols from Nature version 2.1
(MEGANv2.1); the CSIRO chemical transport model; and atmospheric observations
of isoprene, monoterpenes and isoprene oxidation products (methacrolein and
methyl vinyl ketone). Observations from four field campaigns during three
different seasons are used, covering urban, coastal suburban and inland
forest areas. The observed concentrations of isoprene and monoterpenes were
of a broadly similar magnitude, which may indicate that southeast Australia
holds an unusual position where neither chemical species dominates. The model
results overestimate the observed atmospheric concentrations of isoprene (up
to a factor of 6) and underestimate the monoterpene concentrations (up to a
factor of 4). This may occur because the emission rates currently used in
MEGANv2.1 for Australia are drawn mainly from young eucalypt trees
(< 7 years), which may emit more isoprene than adult trees. There is
no single increase/decrease factor for the emissions which suits all seasons
and conditions studied. There is a need for further field measurements of in
situ isoprene and monoterpene emission fluxes in Australia. |
url |
https://www.atmos-chem-phys.net/16/6997/2016/acp-16-6997-2016.pdf |
work_keys_str_mv |
AT kmemmerson currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT iegalbally currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT abguenther currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT cpatonwalsh currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT eaguerette currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT mecope currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT mdkeywood currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT sjlawson currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT sbmolloy currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT edunne currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT mthatcher currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT tkarl currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia AT sdmaleknia currentestimatesofbiogenicemissionsfromeucalyptsuncertainforsoutheastaustralia |
_version_ |
1725817095449477120 |