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| 1.Poster Title | Perturbent Perturbed Convection Parameter Experiments: Sensivity Sensitivity to ACME and CEMS CESM vertical resolution |
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| 2.Authors | |
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| 3.Group | AtmopshereAtmosphere |
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| 4.Experiment | Watercycle |
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| 5.Poster Category | Early Result |
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| 6.Submission Type | POsterPoster |
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| 7.Poster Link | Neale_ACME_Jun16 |
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| 8.Lightning Talk Slide | Neale_ACME_Jun16_hlite.pdf |
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Abstract
| page | 2016-06-07 ACME Project All-Hands Meeting Posters |
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| height | 400 |
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Abstract
The parameterization of deep convection in the ACME atmosphere model continues to be based upon the Zhang-McFarlane (1995, ZM) parameterization scheme. Only moderate adjustments have been made to this scheme since the CCSM4 version of the NCAR model. In preparation for the v1.0 version of the model we have probed many of the parameters key to the operation of the ZM scheme. Initially, these sensitivity experiments were performed in CAM5.5, a largely similar configuration to v1.0 in it's moist physics representation. A range of parameters that are not frequently used as tuning parameters were investigated including parcel temperature perturbations, downdraft fraction and CAPE microphysical calculation assumptions. The aims of this study were two-fold. To improve South American DJF rainfall biases, which currently have a severe impact on the Amazon land surface due to excessive dryness, and to increase the strength of tropical modes of variability which remain poor from the v0.3 version.
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