Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9555
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dc.contributor.authorallAlessandri, A.; ENEA, Rome, Italyen
dc.contributor.authorallBorrelli, A.; CMCC, Bologna, Italyen
dc.contributor.authorallCherchi, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallMateria, S.; CMCC, Bologna, Italyen
dc.contributor.authorallNavarra, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallLee, J.-Y.; Pusan National University, Busan, South Koreaen
dc.contributor.authorallWang, B.; International Pacific Research Center, Honolulu, Hawaiien
dc.date.accessioned2015-04-20T14:40:10Zen
dc.date.available2015-04-20T14:40:10Zen
dc.date.issued2015en
dc.identifier.urihttp://hdl.handle.net/2122/9555en
dc.description.abstractEnsembles of retrospective 2-month dynamical forecasts initiated on 1May are used to predict the onset of the Indian summer monsoon (ISM) for the period 1989–2005. The subseasonal predictions (SSPs) are based on a coupled general circulation model and recently they have been upgraded by the realistic initialization of the atmosphere with initial conditions taken from reanalysis. Two objective large-scale methods based on dynamical circulation and hydrological indices are applied to detect the ISM onset. The SSPs show some skill in forecasting earlier-than-normal ISM onsets, while they have difficulty in predicting late onsets. It is shown that significant contribution to the skill in forecasting early ISM onsets comes from the newly developed initialization of the atmosphere from reanalysis. On one hand, atmospheric initialization produces a better representation of the atmospheric mean state in the initial conditions, leading to a systematically improved monsoon onset sequence. On the other hand, the initialization of the atmosphere allows some skill in forecasting the northward propagating intraseasonal wind and precipitation anomalies over the tropical Indian Ocean. The northward propagating intraseasonal modes trigger the monsoon in some early-onset years. The realistic phase initialization of these modes improves the forecasts of the associated earlier-than-normal monsoon onsets. The prediction of late onsets is not noticeably improved by the initialization of the atmosphere. It is suggested that late onsets of the monsoon are too far away from the start date of the forecasts to conserve enough memory of the intraseasonal oscillation (ISO) anomalies and of the improved representation of the mean state in the initial conditions.en
dc.language.isoEnglishen
dc.publisher.nameAmerican Meteorological Societyen
dc.relation.ispartofMonthly Weather Reviewen
dc.relation.ispartofseries/143 (2015)en
dc.subjectindian summer monsoonen
dc.subjectonseten
dc.subjectseasonal predictionsen
dc.titlePrediction of Indian summer monsoon onset using dynamical sub-seasonal forecasts: effects of realistic initialization of the atmosphereen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber778-793en
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.02. Climateen
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.04. Processes and Dynamicsen
dc.identifier.doi10.1175/MWR5D514500187.1en
dc.description.obiettivoSpecifico4A. Clima e Oceanien
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0027-0644en
dc.relation.eissn1520-0493en
dc.contributor.authorAlessandri, A.en
dc.contributor.authorBorrelli, A.en
dc.contributor.authorCherchi, A.en
dc.contributor.authorMateria, S.en
dc.contributor.authorNavarra, A.en
dc.contributor.authorLee, J.-Y.en
dc.contributor.authorWang, B.en
dc.contributor.departmentENEA, Rome, Italyen
dc.contributor.departmentCMCC, Bologna, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentCMCC, Bologna, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentPusan National University, Busan, South Koreaen
dc.contributor.departmentInternational Pacific Research Center, Honolulu, Hawaiien
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptENEA, Rome, Italy-
crisitem.author.deptCentro Euro-Mediterraneo per i Cambiamenti Climatici, Bologna, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptCMCC, Italy-
crisitem.author.deptPusan National University, Busan, South Korea-
crisitem.author.deptInternational Pacific Research Center, Honolulu, Hawaii-
crisitem.author.orcid0000-0002-2307-4278-
crisitem.author.orcid0000-0002-0178-9264-
crisitem.author.orcid0000-0001-5635-2847-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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