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标题：El Niño–Southern Oscillation effect on quasi-biennial oscillations of temperature diurnal tides in the mesosphere and lower thermosphere
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作者：Yang-Yi Sun ; Huixin Liu ; Yasunobu Miyoshi 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2018
卷号：70
期号：1
页码：1-10
DOI：10.1186/s40623-018-0832-6
出版社：Springer Verlag
摘要：In this study, we evaluate the El Niño–Southern Oscillation (ENSO) signals in the two dominant temperature diurnal tides, diurnal westward wavenumber 1 (DW1) and diurnal eastward wavenumber 3 (DE3) on the quasi-biennial oscillation (QBO) scale (18–34 months) from 50 to 100 km altitudes.The tides are derived from the 21-year (January 1996–February 2017) Ground-to-Topside model of Atmosphere and Ionosphere for Aeronomy (GAIA) temperature simulations and 15-year (February 2002–February 2017) Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED)/Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) temperature observations.The results show that ENSO warm phases shorten the period (~ 2 years) of the QBO in DW1 amplitude near the equator and DE3 amplitude at low latitudes of the Northern Hemisphere.In contrast, the QBO period lengthens (~ 2.5 years) during the ENSO neutral and cold phases.Correlation analysis shows the long-lasting effect of ENSO on the tidal QBO in the mesosphere and lower thermosphere.
关键词：El Niño–Southern Oscillation; Quasi-biennial oscillation; Diurnal tides