Estimating the NOx produced by lightning from GOME and NLDN data: a case study in the Gulf of Mexico S. Beirle, N. Spichtinger, A. Stohl, K. L. Cummins, T. Turner, D. Boccippio, O. R. Cooper, M. Wenig, M. Grzegorski, U. Platt, and T. Wagner Institut für Umweltphysik, Universität Heidelberg, Germany Department of Ecology, Technical University of Munich, Germany Norsk institutt for luftforskning ...