MF radar observations of extra-long period waves in the mesosphere and lower thermosphere at Yamagawa (31 N, 131 E) and Wakkanai (45 N, 141 E)

Details MF radar observations of extra-long period waves in the mesosphere and lower thermosphere at Yamagawa (31 N, 131 E) and Wakkanai (45 N, 141 E) MF radar observations of extra-long period waves in the mesosphere and lower thermosphere at Yamagawa (31 N, 131 E) and Wakkanai (45 N, 141 E)

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....1004n&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #1004

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Planetary scale oscillations in the mesosphere and lower thermosphere (MLT) region have been under investigations in the past three decades. It has been identified that waves with a variety of periodicities (for example, quasi 2-, 5-, and 16-day etc) exist in the middle atmosphere. In search of extra-long period waves in the MLT region, we have analyzed the MF radar databases of Yamagawa (31^oN, 131^oE) and Wakkanai (45^oN, 141^oE) in Japan. Analysis of the MF radar database for the period of 1996-2000 clearly indicates evidence of longer period planetary waves in the MLT region. Particularly, the dominance of 20-40 days is observed at both sites. The paper will address the seasonal trends in the planetary wave activity. Also the features observed at similar midlatitude sites will be examined.

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