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Large interannual variations in nonmethane volatile organic compound emissions based on measurements of carbon monoxide


Citation:Park, K., L. Emmons, Z. Wang (more) , 2013: Large interannual variations in nonmethane volatile organic compound emissions based on measurements of carbon monoxide. Geophysical Research Letters, 40, 221-226, DOI: 10.1029/2012GL052303.
UCAR/NCAR/UCP Authors:
  • Emmons, L. , Atmospheric Chemistry Division (ACD)
Other Authors:
UCAR Affiliations: Atmospheric Chemistry Division (ACD)
Abstract:[1] We present source estimates of atmospheric carbon monoxide from nonmethane volatile organic compound (NMVOC) oxidation during a period of 8 years (1997-2004) using a Bayesian inversion analysis. The optimized global NMVOC-derived CO source strength indicates a change of a factor of 2 between the 1997-1998 strong El Niño and subsequent La Niña conditions. For comparison, the average 8-year interannual variability (IAV) is 18%. The variation of NMVOC-derived CO is closely correlated with the Oceanic Niño Index (ONI) and surface temperature. A time-lagged correlation analysis between ONI and NMVOC-derived CO inventory indicated El Niño/Southern Oscillation leads the Northern Hemisphere (NH) NMVOC-derived CO production by about 3 months earlier than the Southern Hemisphere's (SH). The SH NMVOC-derived CO was positively correlated with the lagged-ONI (r=0.57), while the temperature change barely influenced SH NMVOC-derived CO (r=0.01). In the NH, temperature was more robustly correlated with NMVOC-derived CO (r=0.58) than the lagged-ONI (r=0.35). In particular, the extra-tropical temperature showed a strong correlation (r=0.90) with the NH NMVOC-derived CO and suggested its primary role in controlling the interannual variability of the NH NMVOC-derived CO.
Classification:Refereed
Resource Type:Article
Date Published2013-01-16
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Published Version:10.1029/2012GL052303
Copyright Notice:Copyright 2013 American Geophysical Union.
Citable URL:http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-872