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, 376 – 378 , https://doi.org/10.1038/326376a0 . 10.1038/326376a0 Hayashi , Y. , 1979 : A generalized method of resolving transient disturbances into standing and traveling waves by space-time spectral analysis . J. Atmos. Sci. , 36 , 1017 – 1029 , https://doi.org/10.1175/1520-0469(1979)036<1017:AGMORT>2.0.CO;2 . 10.1175/1520-0469(1979)036<1017:AGMORT>2.0.CO;2 Hendon , H. H. , and M. C. Wheeler , 2008 : Some space–time spectral analyses of tropical convection and planetary-scale waves
, 376 – 378 , https://doi.org/10.1038/326376a0 . 10.1038/326376a0 Hayashi , Y. , 1979 : A generalized method of resolving transient disturbances into standing and traveling waves by space-time spectral analysis . J. Atmos. Sci. , 36 , 1017 – 1029 , https://doi.org/10.1175/1520-0469(1979)036<1017:AGMORT>2.0.CO;2 . 10.1175/1520-0469(1979)036<1017:AGMORT>2.0.CO;2 Hendon , H. H. , and M. C. Wheeler , 2008 : Some space–time spectral analyses of tropical convection and planetary-scale waves
. 2020 ). Thus, an adequate representation of WCBs is desirable in NWP and climate models. First introduced by Browning et al. (1973) and Harrold (1973) , WCBs are defined as cyclone-relative airstreams that ascend from the planetary boundary layer to the upper troposphere along vertically sloping isentropic surfaces. Assuming the absence of nonconservative forces, early studies identified WCBs using cyclone-relative streamlines on a wet-bulb potential temperature surface (e.g., Harrold 1973
. 2020 ). Thus, an adequate representation of WCBs is desirable in NWP and climate models. First introduced by Browning et al. (1973) and Harrold (1973) , WCBs are defined as cyclone-relative airstreams that ascend from the planetary boundary layer to the upper troposphere along vertically sloping isentropic surfaces. Assuming the absence of nonconservative forces, early studies identified WCBs using cyclone-relative streamlines on a wet-bulb potential temperature surface (e.g., Harrold 1973
