Quasi‐Biennial Oscillation of Short‐Period Planetary Waves and Polar Night Jet in Winter Antarctica Observed in SABER and MERRA‐2 and Mechanism Study With a Quasi‐Geostrophic Model

Lu, Xian; Wu, Haonan; Chu, Xinzhao; Oberheide, Jens; Mlynczak, Martin G.; Russell, James M.

doi:10.1029/2019gl084759

i

Quasi‐Biennial Oscillation of Short‐Period Planetary Waves and Polar Night Jet in Winter Antarctica Observed in SABER and MERRA‐2 and Mechanism Study With a Quasi‐Geostrophic Model

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2019
By Lu, Xian ; Wu, Haonan ; Chu, Xinzhao ; ...

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Journal Title:

Geophysical Research Letters
Personal Author:

Lu, Xian ; Wu, Haonan ; Chu, Xinzhao ; Oberheide, Jens ; Mlynczak, Martin G. ; Russell, James M.
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

Analyzing Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) observations from 2003 to 2018, the interannual variability of 2 –5d eastward propagating planetary waves is found to correlate positively with zonal ‐mean zonal winds averaged over 67.5°±10°S but negatively with the quasi ‐biennial oscillation (QBO) index in austral winter. The composite ‐mean wave amplitudes are ~20% larger in QBOe than in QBOw. On statistical average, the poleward ﬂank strengthening and the equatorward ﬂank weakening of polar night jet (PNJ) during QBOe form a dipole ‐cell pattern. In contrast, only a single negative cell is seen in the Northern Hemisphere zonal ‐mean zonal winds (January) previously
Keywords:

General Earth And Planetary Sciences Geophysics General Earth And Planetary Sciences General Earth And Planetary Sciences
Source:

Geophysical Research Letters, 46(22), 13526-13534
DOI:

https://doi.org/10.1029/2019gl084759
ISSN:

0094-8276 ; 1944-8007
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Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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urn:sha256:89b294846a8026cd80df32c7607608d8eb1ca7369b3645686e5175482c85d6a6
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