Journal article
The impact of stochastic parametrisations on the representation of the Asian summer monsoon
- Abstract:
- The impact of the stochastic schemes Stochastically Perturbed Parametrisation Tendencies (SPPT) and Stochastic Kinetic Energy Backscatter Scheme (SKEBS) on the representation of interannual variability in the Asian summer monsoon is examined in the coupled climate model CCSM4. The Webster–Yang index, measuring anomalies of a specified wind-shear index in the monsoon region, is used as a metric for monsoon strength, and is used to analyse the output of three model integrations: one deterministic, one with SPPT, and one with SKEBS. Both schemes show improved variability, which we trace back to improvements in the El Niño-Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD). SPPT improves the representation of ENSO and through teleconnections thereby the monsoon, supporting previous work on the benefits of this scheme on the model climate. SKEBS also improves monsoon variability by way of improving the representation of the IOD, in particular by breaking an overly strong coupling to ENSO.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 3.3MB, Terms of use)
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- Publisher copy:
- 10.1007/s00382-017-3749-z
Authors
- Publisher:
- Springer
- Journal:
- Climate Dynamics More from this journal
- Volume:
- 50
- Issue:
- 5-6
- Pages:
- 2269-2282
- Publication date:
- 2017-06-01
- Acceptance date:
- 2017-06-01
- DOI:
- EISSN:
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1432-0894
- ISSN:
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0930-7575
- Keywords:
- Pubs id:
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pubs:831881
- UUID:
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uuid:fd73a745-d7e7-456f-97eb-c69d676d91e9
- Local pid:
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pubs:831881
- Source identifiers:
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831881
- Deposit date:
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2018-04-04
Terms of use
- Copyright holder:
- *Copyright holder name ("et al" as required)*
- Copyright date:
- 2017
- Notes:
- © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
- Licence:
- CC Attribution (CC BY)
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