@article{articlea665276d, title = {Atmospheric effects on extensive air showers observed with the surface detector of the Pierre Auger Observatory}, author = {Abraham, J. and Abreu, P. and Aglietta, M. and Aguirre, C. and Ahn, E. J. and Allard, D. and Allekotte, I. and Allen, J. and Allison, P. and Alvarez-Muñiz, J. and Ambrosio, M. and Anchordoqui, L. and Andringa, S. and Anzalone, A. and Aramo, C. and Arganda, E. and Argirò, S. and Arisaka, K. and Arneodo, F. and Arqueros, F. and Asch, T. and Asorey, H. and Assis, P. and Aublin, J. and Ave, M. and Avila, G. and Bäcker, T. and Badagnani, D. and Barber, K. B. and Barbosa, A. F. and Barroso, S. L. C. and Baughman, B. and Bauleo, P. and Beatty, J. J. and Beau, T. and Becker, B. R. and Becker, K. H. and Bellétoile, A. and Bellido, J. A. and BenZvi, S. and Berat, C. and Bernardini, P. and Bertou, X. and Biermann, P. L. and Billoir, P. and Bigas, O. Blanch and Blanco, F. and Bleve, C. and Blümer, H. and Bohácová, M. and Bonifazi, C. and Bonino, R. and Borodai, N. and Brack, J. and Brogueira, P. and Brown, W. C. and Bruijn, R. and Buchholz, P. and Bueno, A. and Burton, R. E. and Busca, N. G. and Caballero-Mora, K. S. and Caramete, L. and Caruso, R. and Carvalho, W. and Castellina, A. and Catalano, O. and Cazon, L. and Cester, R. and Chauvin, J. and Chiavassa, A. and Chinellato, J. A. and Chou, A. and Chudoba, J. and Chye, J. and Clay, R. W. and Colombo, E. and Conceição, R. and Connoly, B. and Contreras, F. and Coppens, J. and Cordier, A. and Cotti, U. and Coutu, S. and Covault, C. E. and Creusot, A. and Criss, A. and Cronin, J. and Curutiu, A. and Campagne, S. Dagoret and Dallier, R. and Daumiller, K. and Dawson, B. R. and Almeida, R. M. and De Domenico, M. and De Donato, C. and Jong, S. J. and De La Vega, G. and Mello Junior, W. J. M. and Mello Neto, J. R. T. and De Mitri, I. and Souza, Vitor de and Vries, K. D. and Decerprit, G. and Peral, L. and Deligny, O. and Della Selva, A. and Delle Fratte, C. and Dembinski, H. and Di Giulio, C. and Diaz, J. C. and Diep, P. N. and Dobrigkeit, C. and D´Olivo, J. C. and Dong, P. N. and Dornic, D. and Gouffon, Philippe and Tridapalli, Diogo Bernardes}, year = {2009}, doi = {10.1016/j.astropartphys.2009.06.004}, journal = {Astroparticle Physics} }