Further Evidence of Normal Mode Rossby Waves

1989 ◽  
pp. 277-289 ◽  
Author(s):  
Toshihiko Hirooka ◽  
Isamu Hirota
Keyword(s):  
Normal Mode ◽  
Rossby Waves

scholarly journals Impacts of the horizontal and vertical grids on the numerical solutions of the dynamical equations – Part 2: Quasi-geostrophic Rossby modes

2018 ◽  
Vol 11 (5) ◽  
pp. 1785-1797 ◽  
Author(s):  
Celal S. Konor ◽  
David A. Randall
Keyword(s):  
Normal Mode ◽  
Rossby Waves ◽  
Numerical Solutions ◽  
Normal Mode Analysis ◽  
Companion Paper ◽  
Mode Analysis ◽  
Dynamical Equations ◽  
Grid Solution ◽  
Horizontal Grid ◽  
Vertical Grids

Abstract. We use a normal-mode analysis to investigate the impacts of the horizontal and vertical discretizations on the numerical solutions of the quasi-geostrophic anelastic baroclinic and barotropic Rossby modes on a midlatitude β plane. The dispersion equations are derived for the linearized anelastic system, discretized on the Z, C, D, CD, (DC), A, E and B horizontal grids, and on the L and CP vertical grids. The effects of various horizontal grid spacings and vertical wavenumbers are discussed. A companion paper, Part 1, discusses the impacts of the discretization on the inertia–gravity modes on a midlatitude f plane. The results of our normal-mode analyses for the Rossby waves overall support the conclusions of the previous studies obtained with the shallow-water equations. We identify an area of disagreement with the E-grid solution.

Further evidence of normal mode Rossby waves

1989 ◽  
Vol 130 (2-3) ◽  
pp. 277-289 ◽  
Author(s):  
Toshihiko Hirooka ◽  
Isamu Hirota
Keyword(s):  
Normal Mode ◽  
Rossby Waves

scholarly journals Detection of Rossby Waves in the Sun using Normal-mode Coupling

2019 ◽  
Vol 871 (2) ◽  
pp. L32 ◽  
Author(s):  
Shravan Hanasoge ◽  
Krishnendu Mandal
Keyword(s):  
Normal Mode ◽  
Mode Coupling ◽  
Rossby Waves ◽  
The Sun ◽  
Normal Mode Coupling

scholarly journals Normal mode Rossby waves and their effects on chemical composition in the late summer stratosphere

2007 ◽  
Vol 7 (4) ◽  
pp. 12011-12033
Author(s):  
D. Pendlebury ◽  
T. G. Shepherd ◽  
M. Pritchard ◽  
C. McLandress
Keyword(s):  
Normal Mode ◽  
Rossby Waves ◽  
Middle Atmosphere ◽  
Travelling Waves ◽  
Chemical Species ◽  
Late Summer ◽  
Long Term Trends ◽  
Time Lagged ◽  
Chemical Fields ◽  
The Impact

Abstract. During past MANTRA campaigns, ground-based measurements of several long-lived chemical species have revealed quasi-periodic fluctuations on time scales of several days. These fluctuations could confound efforts to detect long-term trends from MANTRA, and need to be understood and accounted for. Using the Canadian Middle Atmosphere Model, we investigate the role of dynamical variability in the late summer stratosphere due to normal mode Rossby waves and the impact of this variability on fluctuations in chemical species. Wavenumber~1, westward travelling waves are considered with average periods of 5, 10 and 16 days. Time-lagged correlations between the temperature and nitrous oxide, methane and ozone fields are calculated in order to assess the possible impact of these waves on the chemical species, although transport may be the dominant effect. Using Fourier-wavelet decomposition and correlating the fluctuations between the temperature and chemical fields, we determine that variations in the chemical species are well-correlated with the 5-day wave and the 10-day wave between 30 and 60 km. Interannual variability of the waves is also examined.

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