Linear response functions of two convective parameterization schemes

Two 1D atmospheric column models containing convective parameterization schemes are compared to a 3D cloud system resolving model (CSRM) using a recent technique that admits study of responses of convection to small temperature and moisture anomalies. There exist notable differences between the responses of the column models and those of the CSRM. In certain cases, the column models elicit anomalous first-baroclinic mode temperature or moisture structure while a second-mode structure occurs in the CSRM and vice versa. Moreover, unlike the CSRM, the column models do not eliminate prescribed temperature anomalies after a 24 h period. Lastly, while the CSRM exhibits short-term responses throughout the depth of the modeled troposphere overlying prescribed temperature anomalies, responses in both column models are mostly local -- suggesting that a significant attribute of the CSRM response is missing from these models. Such differences have implications to the simulation of large-scale convective phenomena, such as the growth and propagation of convectively coupled waves (CCW). The technique employed herein can be used as a basis for tuning convective parameterization schemes.