METHOD FOR CALCULATING TORSIONAL OSCILLATIONS IN EARTH’S ATMOSPHERE FROM NCEP/NCAR, MERRA-2, ECMWF ERA-40, AND ERA-INTERIM Journal title: Solar-Terrestrial Physics Authors: Zorkaltseva O.S., Mordvinov V.I., Devyatova E.V., Dombrovskaya N.S. Subject(s): Physics, Atmospheric Sciences