A long-term study of the quasi-two-day wave in the middle atmosphere

Details A long-term study of the quasi-two-day wave in the middle atmosphere A long-term study of the quasi-two-day wave in the middle atmosphere

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jatp...56..569h&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 56, no. 5, p. 569-579

Physics

40

Mesosphere, Periodic Variations, Wind (Meteorology), Zonal Flow (Meteorology), Geomagnetism, Meridional Flow, Power Spectra, Time Series Analysis, Wind Variations

Scientific paper

Winds in the upper mesosphere, observed at Adelaide (35 deg S, 138 deg E) using the spaced-antenna technique, have been used to study the features and long-term trends of the quasi-two-day wave over the 12 summers from 1980 to 1991. This report investigates the possibility that the quasi-two-day wave maintains its phase relation, with respect to the local solar time, from year to year. The period of this wave phenomenon over the 12 summers ranged from 46.0 to 51.0 h, with a median period around 48.5 h. A very long vertical wavelength (greater than or equal to 150 km) was found at Adelaide during most years. The phase (in local time) was found to vary from year to year, and cycle to cycle. This is not suprising since the period also varied by a few hours. Although the phase locking was not precise, there was a tendency for the maximum northward and eastward winds of the quasi-two-day wave to occur between 1200 and 1600 h LT every year. The phase relationship between the zonal and meridional components was investigated. It was found that although the zonal tends to lead the meridional by 1/16 - 1/4 of a cycle (3-12 h), the mean vector phases over all summers differ by less than 4 h, and are the same at some altitudes.

Affiliated with

Also associated with

No associations

Rating

A long-term study of the quasi-two-day wave in the 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 A long-term study of the quasi-two-day wave in the middle atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A long-term study of the quasi-two-day wave in the middle atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1257779