Stratospheric AOD after the 2011 eruption of Nabro volcano measured by lidars over the Northern Hemisphere Sawamura, P Vernier, J. E. Barnes, J. E. Welton, E. J. Alados Arboledas, Lucas Navas Guzmán, Francisco Pappalardo, G Mona, L. Madonna, F. Lange, D Sicard, M. Godin-Beekmann, S. Payene, G. Wang, Z. Hu, S. Tripathi, S. N. Córdoba-Jabonero, Carmen Hoff, R. M. Lidar work at UMBC was funded by grant NNX10AR38G (DISCOVER-AQ). The NASA Micro-Pulse Lidar Network is funded by the NASA Earth Observing System and Radiation Sciences Program. Lidar work at the Hefei site was funded by the National Key Basic Research Project of China under Grant No. 2007FY110700. Lidar work at Universidad de Granada was funded by grants CGL2010-18782 and P10-RNM-6299. The EARLINET stations are funded by the EU FP7 Project ‘ACTRIS’. SNT was supported under the program, Changing Water Cycle funded jointly by Ministry of Earth Sciences, India and Natural Environment Research Council, UK. The OHP lidar measurements are funded by CNRS INSU. Nabro volcano (13.37 N, 41.70 E) in Eritrea erupted on 13 June 2011 generating a layer of sulfate aerosols that persisted in the stratosphere for months. For the first time we report on ground-based lidar observations of the same event from every continent in the Northern Hemisphere, taking advantage of the synergy between global lidar networks such as EARLINET, MPLNET and NDACC with independent lidar groups and satellite CALIPSO to track the evolution of the stratospheric aerosol layer in various parts of the globe. The globally averaged aerosol optical depth (AOD) due to the stratospheric vol- canic aerosol layers was of the order of 0.018±0.009 at 532 nm, ranging from 0.003 to 0.04. Compared to the total column AOD from the available collocated AERONET stations, the stratospheric contribution varied from 2% to 23% at 532 nm. 2025-01-28T08:51:09Z 2025-01-28T08:51:09Z 2012-08-06 journal article Sawamura, P. et al. Stratospheric AOD after the 2011 eruption of Nabro volcano measured by lidars over the Northern Hemisphere, Environmental Research Letters, 7, 2012. 034013,1-9, doi:10.1088/1748-9326/7/3/034013 https://hdl.handle.net/10481/100659 10.1088/1748-9326/7/3/034013 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional IOP Science