Diurnal propagating tides in the low-latitude middle atmosphere

Details Diurnal propagating tides in the low-latitude middle atmosphere Diurnal propagating tides in the low-latitude middle atmosphere

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jatp...49..153f&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 49, Feb. 1987, p. 153-164.

Physics

34

Atmospheric Tides, Diurnal Variations, Gravity Waves, Middle Atmosphere, Atmospheric Heating, Atmospheric Moisture, Dissipation, Insolation, Thermodynamic Equilibrium

Scientific paper

Using an equivalent gravity wave f-plane model, it is shown that longitude variations in diurnal insolation absorption by tropospheric H2O can account for longitudinal variations of at least + or - 12-15 percent about zonal mean values in the diurnal wind amplitude at low latitudes (0-20 deg) between 80 and 100 km, by virtue of the nonmigrating propagating tidal modes which are excited. Phase variations of about + or - 0.75 h also occur. These percentage variations are conservative estimates, since the background migrating (1, 1, 1) mode appears to be slightly overestimated in amplitude. In addition, the assumed eddy dissipation values, which appear necessary to model the breaking (1, 1, 1) mode, are larger than generally considered 'reasonable' by photochemical modelers. For a photochemically more reasonable eddy diffusion profile, estimates of longitude differences in diurnal wind amplitude are quite similar to the above values below 87 km, but increase to + or - 17-25 percent near 100 km, with accompanying phase variations of + or - 1-2 h about zonal mean values. In addition, it is shown that radiative damping by CO2 parameterized by a scale-dependent Newtonian cooling coefficient accounts for no more than a 20 percent reduction in the amplitudes of diurnal propagating tides above 80 km.

Affiliated with

Also associated with

No associations

Rating

Diurnal propagating tides in the low-latitude middle atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Diurnal propagating tides in the low-latitude middle atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diurnal propagating tides in the low-latitude middle atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1013125