Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A global model study of the impact of land-use change in Borneo on atmospheric composition
AU - Warwick, N. J.
AU - Archibald, A. T.
AU - Ashworth, K.
AU - Dorsey, J.
AU - Edwards, P. M.
AU - Heard, D. E.
AU - Langford, B.
AU - Lee, J.
AU - Misztal, P. K.
AU - Whalley, L. K.
AU - Pyle, J. A.
PY - 2013
Y1 - 2013
N2 - In this study, a high resolution version of the Cambridge p-TOMCAT chemical transport model is used, along with measurement data from the 2008 NERC-funded Oxidant and Particle Photochemical Processes (OP3) project, to examine the potential impact of the expansion of oil palm in Borneo on atmospheric composition. Several model emission scenarios are run for the OP3 measurement period, incorporating emissions from both global datasets and local flux measurements. Using the OP3 observed isoprene fluxes and OH recycling chemistry in p-TOMCAT substantially improves the comparison between modelled and observed isoprene and OH concentrations relative to using MEGAN isoprene emissions without OH recycling. However, a similar improvement was also achieved without using HOx recycling, by fixing boundary layer isoprene concentrations over Borneo to follow the OP3 observations. An extreme hypothetical future scenario, in which all of Borneo is converted to oil palm plantation, assessed the sensitivity of the model to changes in isoprene and NOx emissions associated with land-use change. This scenario suggested a 70% upper limit on surface ozone increases resulting from land-use change on Borneo, excluding the impact of future changes in emissions elsewhere. Although the largest changes in this scenario occurred directly over Borneo, the model also calculated notable regional changes of O-3, OH and other species downwind of Borneo and in the free troposphere.
AB - In this study, a high resolution version of the Cambridge p-TOMCAT chemical transport model is used, along with measurement data from the 2008 NERC-funded Oxidant and Particle Photochemical Processes (OP3) project, to examine the potential impact of the expansion of oil palm in Borneo on atmospheric composition. Several model emission scenarios are run for the OP3 measurement period, incorporating emissions from both global datasets and local flux measurements. Using the OP3 observed isoprene fluxes and OH recycling chemistry in p-TOMCAT substantially improves the comparison between modelled and observed isoprene and OH concentrations relative to using MEGAN isoprene emissions without OH recycling. However, a similar improvement was also achieved without using HOx recycling, by fixing boundary layer isoprene concentrations over Borneo to follow the OP3 observations. An extreme hypothetical future scenario, in which all of Borneo is converted to oil palm plantation, assessed the sensitivity of the model to changes in isoprene and NOx emissions associated with land-use change. This scenario suggested a 70% upper limit on surface ozone increases resulting from land-use change on Borneo, excluding the impact of future changes in emissions elsewhere. Although the largest changes in this scenario occurred directly over Borneo, the model also calculated notable regional changes of O-3, OH and other species downwind of Borneo and in the free troposphere.
KW - TROPICAL RAIN-FOREST
KW - VOLATILE ORGANIC-COMPOUNDS
KW - OIL PALM PLANTATIONS
KW - TERRESTRIAL ISOPRENE EMISSIONS
KW - TROPOSPHERIC CHEMISTRY
KW - OXIDATION MECHANISMS
KW - COMPOUND EMISSIONS
KW - TRACE GASES
KW - BOX MODEL
KW - OZONE
U2 - 10.5194/acp-13-9183-2013
DO - 10.5194/acp-13-9183-2013
M3 - Journal article
VL - 13
SP - 9183
EP - 9194
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
SN - 1680-7316
IS - 18
ER -