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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7716

Authors: Walsh, K.*
Lavander, S.*
Scoccimarro, E.*
Title: Resolution dependence of tropical cyclone formation in CMIP3 and finer resolution models
Title of journal: Climate dynamics
Series/Report no.: /40 (2013)
Publisher: Springer Verlag GMBH Germany
Issue Date: 2013
DOI: 10.1007/s00382-012-1298-z
Keywords: tropical cyclones
climate models
Abstract: Detection of tropical lows is performed in a suite of climate model simulations using objectively-determined detection thresholds that are resolution-dependent. It is found that there is some relationship between model resolution and tropical cyclone formation rate even after the resolution-dependent tropical cyclone detection threshold is applied. The relationship is investigated between model-simulated tropical cyclone formation and a climate-based tropical cyclone Genesis Potential Index (GPI). It is found that coar- ser-resolution models simulate the GPI better than they simulate formation of tropical cyclones directly. As a result, there appears to be little relationship from model to model between model GPI and the directly-simulated cyclone formation rate. Statistical analysis of the results shows that the main advantage of increasing model resolution is to give a considerably better pattern of cyclone formation. Finer resolution models also simulate a slightly better pattern of GPI, and for these models there is some relationship between the pattern of GPI simulated by each model and that model’s pattern of simulated tropical cyclone formation.
Appears in Collections:01.01.02. Climate
Papers Published / Papers in press

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