Large-Scale Aspects of Deep Convective Activity over the GATE Area

Murakami, Masato

doi:10.1175/1520-0493(1979)107<0994:lsaodc>2.0.co;2

Cited by 311 publications

(177 citation statements)

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“…In Figure 1, we show the time series of the observed decadal IODMI and NINO3 index, and here only decadal signals (8 -25 years) are retained by GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L24207, doi:10.1029/2004GL021345, 2004 using a band pass filter [Murakami, 1979]. Although strong (amplitude larger than one standard deviation of about 0.12°C) decadal IOD episodes are found in the 1950s, early 1960s and 1990s, no consistent phase relationship with the NINO3 index is seen.…”

Section: Resultsmentioning

confidence: 97%

Decadal variability of the Indian Ocean dipole

Ashok

Chan

Motoi

et al. 2004

Geophysical Research Letters

133

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[1] Using the Simple Ocean Data Assimilation (SODA), NCEP/NCAR reanalysis and the GISST datasets from 1950 -1999, and an atmosphere-ocean coupled general circulation model, we explored the possible existence of decadal Indian Ocean Dipole (IOD) variability for the first time. We find that there are strong decadal IOD events, and that the time series of the decadal IOD and decadal ENSO indices are not well correlated. The simulated decadal signal of the IOD index is highly correlated with the 20°C isotherm depth anomaly, indicating that ocean dynamics is involved in the decadal IOD. It is also associated with the zonal wind anomaly. We suggest that the decadal IOD in the tropics is interpreted as decadal modulation of the interannual IOD events.

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Section: Resultsmentioning

confidence: 97%

Decadal variability of the Indian Ocean dipole

Ashok

Chan

Motoi

et al. 2004

Geophysical Research Letters

133

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“…The band-pass filtering procedure is described in detail by Murakami [1979] and has been applied previously by Zhou et al [Hood and Canttell, 1988]. This difference may be due, at least in part, to the fact that the MLS data begin somewhat after solar maximum and therefore do not include as long an interval of large-amplitude solar UV variations as the SBUV data set.…”

Section: Data Descriptionmentioning

confidence: 99%

Stratospheric effects of 27‐day solar ultraviolet variations: An analysis of UARS MLS ozone and temperature data

Hood¹,

Zhou²

1998

J. Geophys. Res.

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“…The daily velocity-potential solving the Poisson equation in terms of the spherical harmonics with a 31-wave triangle truncation. To isolate the intraseasonal oscillation of any meteorological variable with a time scale of 30-60 days, the fourth-order Butterworth bandpass filter, introduced by Murakami (1979), is adopted. Fig.…”

Section: Introductionmentioning

confidence: 99%

The Intraseasonal Oscillation of the Lower-Troposperic Circulation over the Western Pacific during the 1979 Northern Summer

Chen

1993

Journal of the Meteorological Society of Japan

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An effort is made in this study to explore the intraseasonal (30-60 day) oscillation of the lowertropospheric circulation over the western tropical Pacific. It is found that during the 1979 northern summer, the eastward propagation of the global-scale intraseasonal divergent mode induces quasiperiodic alternations of intraseasonal local divergent and convergent centers over the western Pacific. These alternations of intraseasonal local divergent and convergent centers result in the intraseasonal north-south migrations of the North Pacific Convergence Zone (NPCZ), i. e., the Mei Yu and Baiu fronts combined, and the South Pacific Convergence Zone (SPCZ). The regional circulations associated with the NPCZ and SPCZ also exhibit a coherent intraseasonal oscillation. With the intraseasonal local Hadley circulations and the intraseasonal streamfunction budget analysis of the lower-tropospheric circulation, it is shown that the aforementioned coherent intraseasonal oscillation is a response of the regional lower-tropospheric circulation to the eastward propagation of the global-scale intraseasonal oscillation.

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Large-Scale Aspects of Deep Convective Activity over the GATE Area

Cited by 311 publications

References 0 publications

Decadal variability of the Indian Ocean dipole

Decadal variability of the Indian Ocean dipole

Stratospheric effects of 27‐day solar ultraviolet variations: An analysis of UARS MLS ozone and temperature data

The Intraseasonal Oscillation of the Lower-Troposperic Circulation over the Western Pacific during the 1979 Northern Summer

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