Weather and Climate Dynamics
Weather and Climate Dynamics
WCD
Articles | Volume 6, issue 4
Articles | Volume 6, issue 4
https://doi.org/10.5194/wcd-6-1629-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wcd-6-1629-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 6, issue 4
Research article
 | 
02 Dec 2025
Research article |  | 02 Dec 2025

Equatorial wave circulation associated with subseasonal convective variability over the subtropical western North Pacific in boreal summer

Peishan Chen, Katharina M. Holube, Frank Lunkeit, Nedjeljka Žagar, Yuan-Bing Zhao, and Riyu Lu

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Cited articles

Bellon, G. and Reboredo, B.: Scale Sensitivity of the Gill Circulation. Part II: Off-Equatorial Case, J. Atmos. Sci., 79, 19–30, https://doi.org/10.1175/JAS-D-21-0068.1, 2022. a
Boyd, J. P.: Dynamics of the Equatorial Ocean, Springer-Verlag GmbH Germany, https://doi.org/10.1007/978-3-662-55476-0, 2018. a, b
Chatterjee, P. and Goswami, B. N.: Structure, genesis and scale selection of the tropical quasi-biweekly mode, Q. J. Roy. Meteor. Soc., 130, 1171–1194, https://doi.org/10.1256/qj.03.133, 2004. a, b, c, d
Chen, G. and Sui, C.-H.: Characteristics and origin of quasi-biweekly oscillation over the western North Pacific during boreal summer, J. Geophys. Res.-Atmos., 115, https://doi.org/10.1029/2009JD013389, 2010. a, b
Chen, P. and Lu, R.: The Summer Atmospheric Convection Variability over the Tropical Western North Pacific Independent of and Dependent on the Preceding Winter ENSO, J. Climate, 36, 8695–8711, https://doi.org/10.1175/JCLI-D-23-0037.1, 2023. a, b, c
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We analyze the equatorial wave circulation associated with the subtropical western North Pacific (SWNP) convection. Results show that Rossby and Kelvin waves resemble the Gill solution–enhance the equatorward side of the SWNP anticyclone/cyclone together, while mixed Rossby-gravity (MRG) and inertia-gravity (IG) waves dominate the cross-equatorial flow. Following peak convection, IG waves complement Rossby waves to link the SWNP convection and extratropical circulation during austral winter.
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