TY - JOUR
T1 - Waves with period near 3 days in the equatorial mesosphere and lower thermosphere over Ascension Island
AU - Younger, P T
AU - Mitchell, N J
N1 - ID number: ISI:000236309500011
PY - 2006
Y1 - 2006
N2 - A meteor radar was deployed on Ascension Island (8 degrees S, 14 degrees W) in the equatorial mid-Atlantic in 2001. Routine operation started in October of that year. The radar has been used to measure horizontal winds in the equatorial mesosphere/lower thermosphere (MLT) region over the interval October 2001-October 2002. Here. we present results concerning atmospheric waves with periods between similar to 2 and 4 days-a period range which includes 3-day, planetary-scale, ultra-fast Kelvin waves. The observations reveal that in this period range, the wave field is highly variable and, although it displays clear signatures of ultra-fast Kelvin waves, such waves are intermittent and make a relatively minor contribution to the total wave activity at periods near 3 days during this year. (c) 2005 Elsevier Ltd. All rights reserved.
AB - A meteor radar was deployed on Ascension Island (8 degrees S, 14 degrees W) in the equatorial mid-Atlantic in 2001. Routine operation started in October of that year. The radar has been used to measure horizontal winds in the equatorial mesosphere/lower thermosphere (MLT) region over the interval October 2001-October 2002. Here. we present results concerning atmospheric waves with periods between similar to 2 and 4 days-a period range which includes 3-day, planetary-scale, ultra-fast Kelvin waves. The observations reveal that in this period range, the wave field is highly variable and, although it displays clear signatures of ultra-fast Kelvin waves, such waves are intermittent and make a relatively minor contribution to the total wave activity at periods near 3 days during this year. (c) 2005 Elsevier Ltd. All rights reserved.
U2 - 10.1016/j.jastp.2005.05.008
DO - 10.1016/j.jastp.2005.05.008
M3 - Article
SN - 1364-6826
VL - 68
SP - 369
EP - 378
JO - Journal of Atmospheric and Solar-Terrestrial Physics
JF - Journal of Atmospheric and Solar-Terrestrial Physics
IS - 3-5
ER -