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Comparative Global Spectral Energetics Analysis by Saltzman Scheme for Various Climate Model Predictions in 21 Century

PI: Hiroshi L. Tanaka
Institution: University of Tsukuba, Japan
Additional Investigators: Yasushi Watarai, and Koji Terasaki
Abstract:
The understanding of the scale interaction between the meso-scale and global-scale phenomena is an important research subject in the general circulation of the atmosphere as well as the study of climate change. Global spectral energetics analysis introduced by Saltzman can resolve the complicated scale interactions in the wavenumber domain from meso to planetary scales. We have conducted comparative spectral energetics analyses for NCEP/NCAR, ERA-40, and JRA-25 reanalyses (Tanaka et al. 2004). In the proposed study, we plan to conduct the comparative spectral energetics analysis for various climate model predictions under the IPCC Fourth Assessment Report, using four times daily upper air data before and after the global warming. The analysis would show how the intensity of the general circulation would change by the global warming in the 21st century.
Publications:
  • Tanaka, H. L. and Koji Terasaki, 2006: Blocking Formation by an Accumulation of Barotropic Energy Exceeding the Rossby Wave Saturation Level at the Spherical Rhines Scale. J. Meteor.Soc. Japan, 83, 319-332. Abstract. Full Article. Edit.
  • Tanaka, H. L. and Koji Terasaki, 2005: Energy Spectrum and Energy Flow of the Arctic Oscillation in the Phase Speed Domain. SOLA, 1, 65-68, doi:10.2151/sola.2005-018. Abstract. Full Article. Edit.
  • Tanaka, H.L., Y. Watarai, and T. Kanda, 2004: Energy spectrum proportional to the squared phase speed of Rossby modes in the general circulation of the atmosphre. Geophys. Res. Letters, 31 (13), 13109, doi: 10.1029/2004GL019826. Abstract. Full Article. Edit.

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