GCM Simulations of the Three-Dimensional Propagation of Stationary Waves

Yang, Song; Gutowski, William J.

doi:10.1175/1520-0442(1994)007<0414:gsottd>2.0.co;2

Cited by 19 publications

(18 citation statements)

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“…The origin of the Rossby wave is therefore associated with tropical forcing. However, consistent with Karoly et al (1989) and Yang and Gutowski (1994), its midlatitude behavior may be influenced by nonlinear interaction with transient waves in the SH storm track. The fact that the time mean NZ split jet depends on the Indian monsoon raises the possibility that the variability of the jet may also be linked with variability on the monsoon.…”

Section: Introductionmentioning

confidence: 55%

The Seasonal and Wintertime Interannual Variability of the Split Jet and the Storm-Track Activity Minimum near New Zealand

Inatsu

Hoskins²

2006

Journal of the Meteorological Society of Japan

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The seasonal and wintertime interannual variability of the split jet and the storm-track activity minimum near New Zealand (NZ) have been examined based upon the European Centre for Medium Range Weather Forecast Reanalysis (ERA-40) 1979-2001 daily data. Using the split jet index defined in this paper, the climatological variation in the split jet is closely related to the storm-track activity minimum. In austral winter, the split jet is located near NZ along with the storm-track activity minimum, which is established by the climatological Rossby wave forced by the cross-equatorial flow in the Indian Ocean. In austral spring and autumn, in contrast, both the NZ split jet and the storm-track activity minimum are less clear in the absence of the Rossby wave, because of the near-zero Indian Ocean cross-equatorial flow.However, interannual variation in the wintertime Indian Ocean cross-equatorial flow is only weakly associated with interannual variability in the split jet, the correlation being 0.14. The interannual variation in the cross-equatorial flow further east, in the Indonesian region, shows a higher correlation of 0.29. The middle and higher latitude components of the split jet structure are more strongly related to the zonally asymmetric part of the Antarctic Oscillation. An index for this has a 0.43 correlation on interannual time scales with the split jet index. Other processes must also be important for the interannual variability of the split jet and storm-track activity minimum in the NZ region. It is hypothesized that blocking in that region may be of particular importance.

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Section: Introductionmentioning

confidence: 55%

The Seasonal and Wintertime Interannual Variability of the Split Jet and the Storm-Track Activity Minimum near New Zealand

Inatsu

Hoskins²

2006

Journal of the Meteorological Society of Japan

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“…(5.7) in Plumb (1985), as in Randel and Williamson (1990), Yang and Gutowski (1994) and Suo (2008), was used to calculate the wave fluxes:…”

Section: Methodsmentioning

confidence: 99%

“…As in Suo (2008), the domain considered here was extended from the troposphere into the stratosphere ranging vertically from 1000 hPa to 1 hPa, while in Plumb (1985), Randel and Williamson (1990), and Yang and Gutowski (1994) only the troposphere was taken into consideration. However, we report only the results up to 50 hPa because the results did not reach the 5% significance level above 50 hPa.…”

Section: Methodsmentioning

confidence: 99%

“…Our work was actually motivated by Randel and Williamson (1990), Yang and Gutowski (1994), and Suo (2008), who detected an extensive stationary wave activity over the East Pacific-North America sector in northern winters with the same or different data sets for different time periods, which was very weak in Plumb (1985). What causes the difference between Plumb (1985) and his followers?…”

Section: Introductionmentioning

confidence: 96%

“…What causes the difference between Plumb (1985) and his followers? As pointed out in Yang and Gutowski (1994), the new wave activity may represent changes in "stationary waves" from one decade to another, or it may be the result of the many changes in the NMC reanalysis schemes over the period . This is an interesting problem that has not yet attracted attention.…”

Section: Introductionmentioning

confidence: 99%

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The East Pacific Wavetrain: Its variability and impact on the atmospheric circulation in the boreal winter

et al. 2012

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The East Pacific wavetrain (EPW) refers to here the intense stationary wave activity detected in the troposphere over the East Pacific and North America in 45 northern winters from 1958 to 2002. The EPW is generated in the lower troposphere over the East Pacific, propagating predominantly eastward into North America and slightly upward then eventually into the stratosphere. The intensity of the EPW varies from year to year and exhibits apparent decadal variability. For the period 1958-1964, the EPW was in its second maximum, and it was weakest for the period 1965-1975, then it was strongest for the period 1976-1987. After 1987, the EPW weakened again.The intensity and position of the members (i.e., the Aleutian low, the North American trough, and the North American ridge) of the EPW oscillate from time to time. For an active EPW versus a weak EPW, the Aleutian low deepens abnormally and shifts its center from the west to the east of the date line, in the middle and upper troposphere the East Asian trough extends eastward, and the Canadian ridge intensifies at the same time. The opposite is true for a weak EPW. Even in the lower stratosphere, significant changes in the stationary wave pattern are also observed.Interestingly the spatial variability of the EPW assumes a Pacific-North American (PNA)-like teleconnection pattern. It is likely that the PNA low-frequency oscillation is a reflection of the oscillations of intensity and position of the members of the EPW in horizontal direction.

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Simulations by the atmospheric model intercomparison project of atmospheric circulation over southern Africa

Joubert

1997

Int. J. Climatol.

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GCM Simulations of the Three-Dimensional Propagation of Stationary Waves

Cited by 19 publications

References 0 publications

The Seasonal and Wintertime Interannual Variability of the Split Jet and the Storm-Track Activity Minimum near New Zealand

The Seasonal and Wintertime Interannual Variability of the Split Jet and the Storm-Track Activity Minimum near New Zealand

The East Pacific Wavetrain: Its variability and impact on the atmospheric circulation in the boreal winter

Simulations by the atmospheric model intercomparison project of atmospheric circulation over southern Africa

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