TY - JOUR

T1 - Peculiarities of interannual changes in the mean wind and gravity wave characteristics in the mesosphere over Shigaraki, Japan

AU - Gavrilov, N. M.

AU - Fukao, S.

AU - Nakamura, T.

PY - 1999

Y1 - 1999

N2 - Results are presented of month by month measurements of the mean wind and intensity and momentum fluxes of internal gravity waves (IGWs) with the Middle and Upper atmosphere radar (MU radar) at the altitudes 65-80 km at Shigaraki, Japan (35°N, 136°E) in 1986 - 1997. The mean zonal wind is eastward in winter and westward in summer, but the amplitude of these annual variations is different in different years, having a minimum in 1992 - 1994. The mean meridional wind shows substantial quasi-bi-annual variations. IGW intensities and momentum fluxes had a maximum in 1991 - 1994. Some possible reasons for such interannual changes are discussed.

AB - Results are presented of month by month measurements of the mean wind and intensity and momentum fluxes of internal gravity waves (IGWs) with the Middle and Upper atmosphere radar (MU radar) at the altitudes 65-80 km at Shigaraki, Japan (35°N, 136°E) in 1986 - 1997. The mean zonal wind is eastward in winter and westward in summer, but the amplitude of these annual variations is different in different years, having a minimum in 1992 - 1994. The mean meridional wind shows substantial quasi-bi-annual variations. IGW intensities and momentum fluxes had a maximum in 1991 - 1994. Some possible reasons for such interannual changes are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0033395952&partnerID=8YFLogxK

U2 - 10.1029/1999GL900559

DO - 10.1029/1999GL900559

M3 - Article

AN - SCOPUS:0033395952

VL - 26

SP - 2457

EP - 2460

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 16

ER -