- Title
- Eastern North Pacific tropical cyclone activity in historical and future CMIP5 experiments : Assessment with a model-independent tracking scheme
- Creator
- Bell, Samuel; Chand, Savin; Tory, Kevin; Turville, Christopher; Ye, Harvey
- Date
- 2019
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/170411
- Identifier
- vital:14131
- Identifier
-
https://doi.org/10.1007/s00382-019-04830-0
- Identifier
- ISBN:0930-7575
- Abstract
- The sensitivity of tropical cyclone (TC) projection results to different models and the detection and tracking scheme used is well established in the literature. Here, future climate projections of TC activity in the Eastern North Pacific basin (ENP, defined from 0 degrees to 40 degrees N and 180 degrees to similar to 75 degrees W) are assessed with a model- and basin-independent detection and tracking scheme that was trained in reanalysis data. The scheme is applied to models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) experiments forced under the historical and Representative Concentration Pathway 8.5 (RCP8.5) conditions. TC tracks from the observed records and models are analysed simultaneously with a curve-clustering algorithm, allowing observed and model tracks to be projected onto the same set of clusters. The ENP is divided into three clusters, one in the Central North Pacific (CNP) and two off the Mexican coast, as in prior studies. After accounting for model biases and auto-correlation, projection results under RCP8.5 indicated TC genesis to be significantly suppressed east of 125 degrees W, and significantly enhanced west of 145 degrees W by the end of the twenty-first century. Regional TC track exposure was found to significantly increase around Hawaii (similar to 86%), as shown in earlier studies, owing to increased TC genesis, particularly to the south-east of the island nation. TC exposure to Southern Mexico was shown to decrease (similar to 4%), owing to a south-westward displacement of TCs and overall suppression of genesis near the Mexican coastline. The large-scale environmental conditions most consistent with these projected changes were vertical wind shear and relative humidity.
- Publisher
- Springer
- Relation
- Climate Dynamics Vol. 53, no. 7-8 (2019), p. 4841-4855
- Rights
- Copyright © Springer-Verlag GmbH Germany, part of Springer Nature 2019
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0401 Atmospheric Sciences; 0405 Oceanography; 0406 Physical Geography and Environmental Geoscience; Tropical cyclone; Hurricanes; Cyclone genesis; Pacific ocean; CMIP5; Algorithm
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