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DC Field | Value | Language |
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dc.contributor.advisor | Bladé, Ileana | - |
dc.contributor.advisor | García-Serrano, Javier | - |
dc.contributor.author | Rodrigo Sanchez, Mario | - |
dc.date.accessioned | 2020-12-23T14:01:00Z | - |
dc.date.available | 2020-12-23T14:01:00Z | - |
dc.date.issued | 2020-12 | - |
dc.identifier.uri | http://hdl.handle.net/2445/172873 | - |
dc.description | Màster de Meteorologia, Facultat de Física, Universitat de Barcelona, Curs: 2019-2020, Tutors: Ileana Bladé Mendoza, Javier García Serrano | ca |
dc.description.abstract | A stratosphere-resolving configuration (HIGH-TOP) of the EC-EARTH global climate model (GCM) is used to characterize the El Ni~no-Southern Oscillation (ENSO) and compare it to observations. Despite the state of the art stratosphere, HIGH-TOP still presents some biases in the seasonal cycle and in the ENSO spatial pattern common to other GCMs. The interannual peak in the Ni~no3.4 index power spectrum is broadly captured, but the model is biased towards lower frequencies. To assess the effects of a well-resolved stratosphere in the tropical Pacific and, in particular, on ENSO, HIGH-TOP is compared with a low-top version of the model (LOW-TOP). HIGH-TOP displays systematic and statistically significant higher interannual variability in the central-eastern Pacific, along with an improvement in the ENSO pattern of sea surface temperature (SST) anomalies. The comparison of the ENSO-induced tropospheric circulation anomalies reveals a strengthening of the eastern Pacifc intertropical convergence zone (ITCZ) in HIGH-TOP with respect to LOW-TOP. Additionally, in the equatorial eastern Pacific, HIGH-TOP correctly simulates anomalous upward motion, while LOW-TOP simulates anomalous downward motion that enhances the climatological Walker circulation. The stronger ITCZ and the anomalous ascent in the eastern equatorial Pacific in HIGH-TOP are consistent with the higher total interannual variability in SST and precipitation in HIGH-TOP. Hence, incorporating a well-resolved stratosphere in the EC-EARTH model yields a more realistic representation of the variability in the central-eastern Pacific and tropical ENSO pattern. | ca |
dc.format.extent | 12 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | ca |
dc.rights | cc-by-nc-nd (c) Rodrigo, 2020 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.source | Màster Oficial - Meteorologia | - |
dc.subject.classification | El Niño-oscil·lació del sud | cat |
dc.subject.classification | Estratosfera | cat |
dc.subject.classification | Treballs de fi de màster | cat |
dc.subject.other | El Niño–Southern Oscillation | eng |
dc.subject.other | Stratosphere | eng |
dc.subject.other | Master's theses | eng |
dc.title | Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version | eng |
dc.type | info:eu-repo/semantics/masterThesis | ca |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca |
Appears in Collections: | Màster Oficial - Meteorologia |
Files in This Item:
File | Description | Size | Format | |
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RODRIGO_MARIO_TFM.pdf | 10 MB | Adobe PDF | View/Open |
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