Martin, Randall V.Jacob, DanielLogan, JenniferZiemke, Jerry M.Washington, Richard2015-03-122000Martin, Randall V., Daniel J. Jacob, Jennifer A. Logan, Jerry M. Ziemke, and Richard Washington. 2000. “Detection of a Lightning Influence on Tropical Tropospheric Ozone.” Geophys. Res. Lett. 27 (11) (June 1): 1639–1642. doi:10.1029/1999gl011181.0094-8276http://nrs.harvard.edu/urn-3:HUL.InstRepos:14121851Empirical orthogonal functions (EOFs) are used to analyze a 14-year record of tropical tropospheric ozone columns (TTOCs) determined from satellite measurements. The first EOF explains 54% of TTOC variance and represents biomass burning in Africa and South America. The second EOF explains 20% of the variance and has a distinct lightning signature.en-USJournal Article2015-03-1210.1029/1999GL011181