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2000•Geophysical Research LettersRequires access

Effect of ENSO and the MJO on western North Pacific tropical cyclones

Adam H. Sobel, Eric Daniel Maloney

Open publisher page 156 citations

Abstract

Prior work has suggested that Rossby wave accumulation in the lower troposphere may be an important mechanism for the development of synoptic‐scale disturbances in the western north Pacific in northern summer. This work examines the intraseasonal and interannual variability of wave accumulation by computing the barotropic wave activity flux divergence at 850 hPa for different phases of the Madden‐Julian oscillation (MJO) and El Niño/southern oscillation (ENSO). Indirectly, and without ruling out other influences, the results suggest a physical mechanism behind previously identified relationships between tropical cyclogenesis statistics and these two modes of variability (MJO and ENSO).

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What this paper is about

Prior work has suggested that Rossby wave accumulation in the lower troposphere may be an important mechanism for the development of synoptic‐scale disturbances in the western north Pacific in northern summer. This work examines the intraseasonal and interannual variability of wave accumulation by computing the barotropic wave activity flux divergence at 850 hPa for different phases of the Madden‐Julian oscillation (MJO) and El Niño/southern oscillation (ENSO). Indirectly, and without ruling out other influences, the results suggest a physical mechanism behind previously identified relationships between tropical cyclogenesis statistics and these two modes of variability (MJO and ENSO).

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OpenAlex reports 156 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

Prior work has suggested that Rossby wave accumulation in the lower troposphere may be an important mechanism for the development of synoptic‐scale disturbances in the western north Pacific in northern summer. This work examines the intraseasonal and interannual variability of wave accumulation by computing the barotropic wave activity flux divergence at 850 hPa for different phases of the Madden‐Julian oscillation (MJO) and El Niño/southern oscillation (ENSO). Indirectly, and without ruling out other influences, the results suggest a physical mechanism behind previously identified relationships between tropical cyclogenesis statistics and these two modes of variability (MJO and ENSO).

Key concepts: Madden–Julian oscillation, Climatology, Rossby wave, Tropical cyclogenesis, Cyclogenesis, Tropical cyclone, El Niño Southern Oscillation, Outgoing longwave radiation

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