Influence of Stratospheric Variability on the Winter-Mean Polar Tropospheric Climate

• Kuroda Yuhji

  Meteorological College Meteorological Research Institute

• Toryu Miho

  Mito Local Meteorological Office

• Naoe Hiroaki

  Meteorological Research Institute

Abstract

This study examined the influence of stratospheric variability on the polar winter tropospheric climate. The winter-mean tropospheric condition can be well represented by a winter-mean stratospheric index (the Polar-night Jet Oscillation (PJO) index) defined from profiles of monthly polar temperature anomalies. In winters with a positive (negative) index, the winter-mean surface pressure anomaly tends to acquire a positive (negative) pattern resembling the Arctic Oscillation (AO). This tropospheric condition tends to become a persistent polarity of the AO index throughout the winter. This tendency is also found when the PJO index for each month is used. Although the PJO index in January shows the best results, those in early winter can be used as predictors for the entire winter troposphere. Use of the PJO index for the stratospheric effect on winter troposphere is compared with that associated with the occurrence of the major stratospheric sudden warmings. The origin of the decadal variability of the index is also discussed.

Journal

• SOLA

  SOLA 18 (0), 47-52, 2022

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390291767668039936
• NII Article ID: 130008145016
• DOI: 10.2151/sola.2022-008
• ISSN: 13496476
• Web Site: https://www.jstage.jst.go.jp/article/sola/18/0/18_2022-008/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed