Abstract
Abstract The mechanism for the scale selection of tropical intraseasonal oscillations (ISO) is examined in a stepwise procedure with the use of two models, which differ only in the cumulus parameterization. In the first model, moisture budgets are treated explicitly. Using this model, the ISO with the wavenumber 1 pattern is successfully reproduced and some possible causes responsible for the selection of wavenumber 1 can be specified. The second model does not employ moisture and cumulus convection is related to low-level convergence only. The possible causes obtained by the use of the first model are parameterized and can be implemented or eliminated from the second model to clarify which property is an essential mechanism of the wavenumber selection. In order that the wavenumber 1 pattern is selected, cumulus convection must not be formed over large having low-level convergence, but must be confined to narrow regions. This can be realized by limiting the areas of the wet regions, or preventing weak low...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
