EAMF from NCEP/NCAR Reanalyses - Product metadata
| Content | Data are NCEP values of effective atmospheric angular momentum functions as calculated from NCEP/NCAR reanalyses archived on pressure surfaces. The Transfer functions and Principal moments in Eubanks (1993)are employed to derive the atmospheric angular momentum functions. |
| Documentation | To convert AAMF_X and Y to milliarcsecond (mas) and AAMF_Z to millisecond (ms), one needs to apply the following scale factors:AAMF_X and Y (in mas) = AAMF_X and Y *360*60*60*1000/(2*pi); AAMF_Z (in ms) = AAMF_Z * 24*60*60*1000;http://files.aer.com/aerweb/AAM/readme.aamf.ncep.reanalysis |
| TimeInterval | 6 hours |
| Data | year, month, day, hour, mass_IB_X, mass_IB_Y, mass_IB_Z, mass_NonIB_X, mass_NonIB_Y, mass_NonIB_Z, motion_X, motion_Y, motion_Z |
| Format | ASCII |
| Format Description | 13(e16.7) |
| Frequency | Irregular |
| Keywords | Geophysical fluids, excitation functions, NCEP/NCAR reanalyses |
| Reference | - Salstein, D.A., and R.D. Rosen, 1997: Global momentum and energy signals from reanalysis systems. Preprints, 7th Conf. on Climate Variations, American Meteorological Society, Boston, MA, 344-348.- Kalnay, E., et al., 1996: The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 77, 437-471.- Barnes, R.T.H., R. Hide, A.A. White, and C.A. Wilson, 1983: Atmospheric angular momentum fluctuations, length-of-day changes and polar motion. Proc. R. Soc. London, Ser. A, 387, 31-73. |
| Created by | U. S. National Centers for Environmental Prediction (NCEP) |
| Published by | GGFC Special Bureau for the Atmosphere |
| Contact | pnelson@aer.com |
| Distribution | onLine |