Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8592
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dc.contributor.authorallCherchi, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallNavarra, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.date.accessioned2013-04-02T14:17:52Zen
dc.date.available2013-04-02T14:17:52Zen
dc.date.issued2013en
dc.identifier.urihttp://hdl.handle.net/2122/8592en
dc.description.abstractIndian summer monsoon (ISM) variability is forced from external factors (like the El Nino Southern Oscillation, ENSO) but it contains also an internal component that tends to reduce its potential for predictability. Large-scale and local monsoon indices based on precipitation and atmospheric circulation parameters are used as a measure of ISM variability. In a 9-members ensemble of AMIP-type experiments (with same boundary SST forcing and different initial conditions) their potential predictability is comparable using both local and large-scale monsoon indices. In the sample analyzed, about half of more predictable monsoon years coincide with El Nino and/or positive Indian Ocean Dipole (IOD) events. Summer monsoon characteristics during ENSO and IOD years are analyzed through composites computed over a three years period (i.e. one year before and one year after the event peak) to investigate the mutual relationship between the events lagged in time. The connection between ISM and IOD is mostly confined in the summer and autumn, while that with ENSO is stronger and extends more in time. In the coupled model results the IOD influence on the monsoon is large, even because in the model IOD events are intense and easily reproduced due to a strong air-sea feedback in the eastern side of the basin. Monsoon seasons preceding or following an El Nino or a La Nina event are not exactly symmetric, even in terms of their biennial character. In most of the cases, both in reanalysis and model, El Nino and positive IOD events tend to co-occur with larger anomalies either in the Indo-Pacific ocean sector or over India, while La Nina and negative IOD do not. From the observed record, the ENSO-IOD correlation is positive strong and significant since mid-60s and it may correspond with either strong or weak ENSO-monsoon relationship and with strong or weak IOD-monsoon relationship. A main difference between those periods is the relationship between Indian monsoon rainfall and SST in other ocean basins rather than the Indo-Pacific sector alone.en
dc.language.isoEnglishen
dc.publisher.nameSpringer Verlag GMBH Germanyen
dc.relation.ispartofClimate dynamicsen
dc.relation.ispartofseries/41 (2013)en
dc.subjectIndian summer monsoonen
dc.subjectENSOen
dc.subjectIODen
dc.subjectpotential predictabilityen
dc.titleInfluence of ENSO and of the Indian Ocean dipole on the Indian summer monsoon variabilityen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber81-103en
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.04. Processes and Dynamicsen
dc.identifier.doi10.1007/s00382-012-1602-yen
dc.description.obiettivoSpecifico3.7. Dinamica del clima e dell'oceanoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.relation.issn0930-7575en
dc.relation.eissn1432-0894en
dc.contributor.authorCherchi, A.en
dc.contributor.authorNavarra, A.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptCMCC, Italy-
crisitem.author.orcid0000-0002-0178-9264-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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