TY - JOUR
T1 - Negative correlation between the interannual variabilities of the stationary and transient wave energy in the Northern Hemisphere
AU - Kodama, Chihiro
AU - Mochizuki, Yasushi
AU - Hasegawa, Satoshi
AU - Iwasaki, Toshiki
AU - Watanabe, Masahiro
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
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U2 - 10.2151/sola.2010-010
DO - 10.2151/sola.2010-010
M3 - Article
AN - SCOPUS:77954772895
VL - 6
SP - 37
EP - 40
JO - Scientific Online Letters on the Atmosphere
JF - Scientific Online Letters on the Atmosphere
SN - 1349-6476
ER -