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| Titel |
Linking the variability of atmospheric carbon monoxide to climate modes in the Southern Hemisphere |
| VerfasserIn |
Rebecca Buchholz, Sarah Monks, Dorit Hammerling, Helen Worden, Merritt Deeter, Louisa Emmons, David Edwards |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250147405
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| Publikation (Nr.) |
 EGU/EGU2017-11566.pdf |
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| Zusammenfassung |
| Biomass burning is a major driver of atmospheric carbon monoxide (CO) variability in the
Southern Hemisphere. The magnitude of emissions, such as CO, from biomass
burning is connected to climate through both the availability and dryness of fuel. We
investigate the link between CO and climate using satellite measured CO and climate
indices.
Observations of total column CO from the satellite instrument MOPITT are used to
build a record of interannual variability in CO since 2001. Four biomass burning
regions in the Southern Hemisphere are explored. Data driven relationships are
determined between CO and climate indices for the climate modes: El Niño Southern
Oscillation (ENSO); the Indian Ocean Dipole (IOD); the Tropical Southern Atlantic
(TSA); and the Southern Annular Mode (SAM). Stepwise forward and backward
regression is used to select the best statistical model from combinations of lagged
indices. We find evidence for the importance of first-order interaction terms of the
climate modes when explaining CO variability. Implications of the model results are
discussed for the Maritime Southeast Asia and Australasia regions. We also draw
on the chemistry-climate model CAM-chem to explain the source contribution as
well as the relative contributions of emissions and meteorology to CO variability. |
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