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

Details

• 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
• Format:
  PDF
• Publisher:
  American Geophysical Union (AGU)
• Document Type:
  Journal Article
• Rights Information:
  Other
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:89b294846a8026cd80df32c7607608d8eb1ca7369b3645686e5175482c85d6a6
• Download URL:
  https://repository.library.noaa.gov/view/noaa/53942/noaa_53942_DS1.pdf
• File Type:
  [PDF - 8.85 MB ]