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Lightning NOx, a key chemistry–climate interaction: impacts of future climate change and consequences for tropospheric oxidising capacity

Banerjee, A.; Archibald, A.T.; Maycock, A.C.; Telford, P.; Abraham, N.L.; Yang, X.; Braesicke, P.; Pyle, J.A.

Abstract:
Lightning is one of the major natural sources of NOx in the atmosphere. A suite of time slice experiments using a stratosphere-resolving configuration of the Unified Model (UM), containing the United Kingdom Chemistry and Aerosols sub-model (UKCA), has been performed to investigate the impact of climate change on emissions of NOx from lightning (LNOx) and to highlight its critical impacts on photochemical ozone production and the oxidising capacity of the troposphere. Two Representative Concentration Pathway (RCP) scenarios (RCP4.5 and RCP8.5) are explored. LNOx is simulated to increase in a year-2100 climate by 33% (RCP4.5) and 78% (RCP8.5), primarily as a result of increases in the depth of convection. The total tropospheric chemical odd oxygen production (P(Ox)) increases linearly with increases in total LNOx and consequently, tropospheric ozone burdens of 29±4 Tg(O3) (RCP4.5) and 46±4 Tg(O3) (RCP8.5) are calculated here. By prescribing a uniform surface boundary concentration for methane in these simulations, methane-driven feedbacks are essentially neglected. A simple estimate of the contribution of the feedback reduces the increase in ozone burden to 24 and 33 Tg(O3), respectively. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000065773
Veröffentlicht am 15.03.2018
Originalveröffentlichung
DOI: 10.5194/acp-14-9871-2014
Scopus
Zitationen: 34
Web of Science
Zitationen: 31
Coverbild
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 1680-7324, 1680-7316
urn:nbn:de:swb:90-657739
KITopen-ID: 1000065773
HGF-Programm 12.04.03 (POF II, LK 01)
Erschienen in Atmospheric chemistry and physics
Band 14
Heft 18
Seiten 9871–9881
Nachgewiesen in Scopus
Web of Science
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