1. Retraction: Methane Emissions From the Marcellus Shale in Southwestern Pennsylvania and Northern West Virginia Based on Airborne Measurements. Issue 2 (22nd January 2018) Authors: Ren, X.; Hall, D. L.; Vinciguerra, T.; Benish, S. E.; Stratton, P. R.; Ahn, D.; Hansford, J. R.; Cohen, M. D.; Sahu, S.; He, H.; Grimes, C.; Salawitch, R. J.; Ehrman, S. H.; Dickerson, R. R. Journal: Journal of geophysical research Issue: Volume 123:Issue 2(2018) Page Start: 1478 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗