Rights statement: Copyright 2008 by the American Geophysical Union.
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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 - How sensitive is tropospheric oxidation to anthropogenic emissions?
AU - Wild, Oliver
AU - Palmer, Paul I.
N1 - ©2008. American Geophysical Union. All Rights Reserved.
PY - 2008/11/18
Y1 - 2008/11/18
N2 - We use a global chemistry transport model to explore how changes in anthropogenic emissions alter ozone production and tropospheric oxidizing capacity over decadal (1990–2010) and centennial timescales (1900–2100). We find that the spatial extent of O3 production and loss in the troposphere changes very little despite large projected increases in precursor emissions. While tropospheric OH shows a long-term decrease of only 20% between 1900 and 2100, there are widespread changes in distribution which alter regional oxidation capacity substantially. We show that the remote marine boundary layer remains an important net sink of O3, as greater production related to increased continental NO x emissions is outweighed by greater O3 destruction. The critical NO x level required to support net O3 production doubles between 1900 and 2100, from 28 to 55 pptv on average, preventing any large-scale shift in production regime.
AB - We use a global chemistry transport model to explore how changes in anthropogenic emissions alter ozone production and tropospheric oxidizing capacity over decadal (1990–2010) and centennial timescales (1900–2100). We find that the spatial extent of O3 production and loss in the troposphere changes very little despite large projected increases in precursor emissions. While tropospheric OH shows a long-term decrease of only 20% between 1900 and 2100, there are widespread changes in distribution which alter regional oxidation capacity substantially. We show that the remote marine boundary layer remains an important net sink of O3, as greater production related to increased continental NO x emissions is outweighed by greater O3 destruction. The critical NO x level required to support net O3 production doubles between 1900 and 2100, from 28 to 55 pptv on average, preventing any large-scale shift in production regime.
KW - Tropospheric composition
KW - tropospheric chemistry
KW - OH radicals
KW - global change
UR - http://www.scopus.com/inward/record.url?scp=60149091181&partnerID=8YFLogxK
U2 - 10.1029/2008GL035718
DO - 10.1029/2008GL035718
M3 - Journal article
VL - 35
SP - n/a
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - n/a
M1 - L22802
ER -