Negative Correlation between the Interannual Variabilities of the Stationary and Transient Wave Energy in the Northern Hemisphere

• Kodama Chihiro

  Japan Agency for Marine-Earth Science and Technology

• Mochizuki Yasushi

  Japan Meteorological Agency

• Hasegawa Satoshi

  Department of Geophysics, Graduate School of Science, Tohoku University

• Iwasaki Toshiki

  Department of Geophysics, Graduate School of Science, Tohoku University

• Watanabe Masahiro

  Center for Climate System Research, The University of Tokyo

抄録

Interannual variability of the Northern Hemisphere (NH) wave energy is diagnosed using 30-year reanalysis data. Particular attention is paid to a relationship between the stationary and transient wave energy in the extratropics. In the NH, the stationary wave energy is negatively correlated with the transient wave energy on interannual timescales. The correlation coefficient is significantly high during mid-winter and spring between the subtropics and midlatitudes. Throughout the year, negative correlation is also found between NH-mean generation rates of the stationary and transient wave energy, which results from the upward Eliassen-Palm flux. This suggests an essential role of the poleward eddy heat flux in the negative correlation of the wave energy. Standard deviation analysis shows that, in the NH, the interannual variability of the total wave energy is primarily explained by the stationary component. These facts provide a useful implication for understanding future projections of the NH extratropical wave activity.

収録刊行物

• SOLA

  SOLA 6 37-40, 2010

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390001205221961088
• NII論文ID: 130004940914
• DOI: 10.2151/sola.2010-010
• ISSN: 13496476
• Web Site: http://www.jstage.jst.go.jp/article/sola/6/0/6_0_37/_pdf
• 本文言語コード: en
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