Sudden stratospheric warmings seen in MINOS deep underground muon data
نویسندگان
چکیده
S. Osprey, J. Barnett, J. Smith, P. Adamson,2,y C. Andreopoulos, K. E. Arms, R. Armstrong, D. J. Auty, D. S. Ayres, B. Baller, P. D. Barnes Jr., G. D. Barr, W. L. Barrett, B. R. Becker, A. Belias, R. H. Bernstein, D. Bhattacharya, M. Bishai, A. Blake, G. J. Bock, J. Boehm, D. J. Boehnlein, D. Bogert, C. Bower, E. Buckley-Geer, S. Cavanaugh, J. D. Chapman, D. Cherdack, S. Childress, B. C. Choudhary, J. H. Cobb, S. J. Coleman, A. J. Culling, J. K. de Jong, M. Dierckxsens, M. V. Diwan, M. Dorman, S. A. Dytman, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, M. V. Frohne, H. R. Gallagher, A. Godley, M. C. Goodman, P. Gouffon, R. Gran, E. W. Grashorn, N. Grossman, K. Grzelak, A. Habig, D. Harris, P. G. Harris, J. Hartnell, R. Hatcher, A. Himmel, A. Holin, J. Hylen, G. M. Irwin, M. Ishitsuka, D. E. Jaffe, C. James, D. Jensen, T. Kafka, S. M. S. Kasahara, J. J. Kim, G. Koizumi, S. Kopp, M. Kordosky, D. J. Koskinen, A. Kreymer, S. Kumaratunga, K. Lang, J. Ling, P. J. Litchfield, R. P. Litchfield, L. Loiacono, P. Lucas, J. Ma, W. A. Mann, M. L. Marshak, J. S. Marshall, N. Mayer, A. M. McGowan, J. R. Meier, M. D. Messier, C. J. Metelko, D. G. Michael, L. Miller, W. H. Miller, S. R. Mishra, C. D. Moore, J. G. Morfin, L. Mualem, S. Mufson, J. Musser, D. Naples, J. K. Nelson, H. B. Newman, R. J. Nichol, T. C. Nicholls, J. P. Ochoa-Ricoux, W. P. Oliver, R. Ospanov, J. Paley, V. Paolone, Z. Pavlovic, G. Pawloski, G. F. Pearce, C. W. Peck, D. A. Petyt, R. Pittam, R. K. Plunkett, A. Rahaman, R. A. Rameika, T. M. Raufer, B. Rebel, J. Reichenbacher, P. A. Rodrigues, C. Rosenfeld, H. A. Rubin, K. Ruddick, GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L05809, doi:10.1029/2008GL036359, 2009 Click Here for Full Article
منابع مشابه
Observation of Seasonal Variations with the MINOS Far Detector
An observation of seasonal variations in underground muon rate, Rμ, has been performed at Soudan, MN, by the MINOS Far Detector. The four percent fluctuation seen over three years was highly correlated to the temperature variations of the upper atmosphere. The coefficient relating variations in temperature to variations in muon rate was found to be: αT = (T/Rμ)(∂Rμ/∂T ) = 0.87±0.03, which is ne...
متن کاملA New Look at Stratospheric Sudden Warmings. Part I: Climatology and Modeling Benchmarks
Stratospheric sudden warmings are the clearest and strongest manifestation of dynamical coupling in the stratosphere–troposphere system. While many sudden warmings have been individually documented in the literature, this study aims at constructing a comprehensive climatology: all major midwinter warming events are identified and classified, in both the NCEP–NCAR and 40-yr ECMWF Re-Analysis (ER...
متن کاملEl Niño, La Niña, and stratospheric sudden warmings: A reevaluation in light of the observational record
[1] Recent studies have suggested that El Niño‐Southern Oscillation (ENSO) may have a considerable impact on Northern Hemisphere wintertime stratospheric conditions. Notably, during El Niño the stratosphere is warmer than during ENSO‐neutral winters, and the polar vortex is weaker. Opposite‐signed anomalies have been reported during La Niña, but are considerably smaller in amplitude than during...
متن کاملSupervised Learning Approaches to Classify Sudden Stratospheric Warming Events
Sudden stratospheric warmings are prominent examples of dynamical wave–mean flow interactions in the Arctic stratosphere during Northern Hemisphere winter. They are characterized by a strong temperature increase on time scales of a few days and a strongly disturbed stratospheric vortex. This work investigates a wide class of supervised learning methods with respect to their ability to classify ...
متن کاملNeutrino-induced muons observed with MINOS
The Main Injector Neutrino Oscillation Search (MINOS) experiment’s Far Detector has been operational since July 2003, taking cosmic ray and atmospheric neutrino data from its location in the Soudan Mine Underground Lab. Numerous neutrino-induced muons have been observed. The detector’s magnetic field allows the first determination by a large underground detector of muon charge and thus neutrino...
متن کاملLower-Stratospheric Radiative Damping and Polar-Night Jet Oscillation Events
The effect of stratospheric radiative damping time scales on stratospheric variability and on stratosphere– troposphere coupling is investigated in a simplified global circulation model by modifying the vertical profile of radiative damping in the stratosphere while holding it fixed in the troposphere. Perpetual-January conditions are imposed, with sinusoidal topography of zonal wavenumber 1 or...
متن کامل