Study of seasonal-scale atmospheric water cycle with ground-based GPS receivers, radiosondes and NWP models over Morocco

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dc.contributor.authorKoulali, Achraf
dc.contributor.authorOuazar, Driss
dc.contributor.authorBock, Olivier
dc.contributor.authorFadil, Abdelali
dc.date.accessioned2013-08-09T16:05:16Z
dc.date.available2013-08-09T16:05:16Z
dc.date.copyright2011
dc.date.issued2011
dc.description.abstractThis study investigates the seasonal variation of precipitable water vapor, moisture transport and precipitation over Morocco and the Canary Islands using data from ground-based GPS receivers, radiosondes, GPCP and NCEP reanalysis II. In a first part, the datasets are inter-compared. Humidity biases are evidenced in both radiosonde observations (dry) and NCEP reanalysis (dry and wet) compared to GPS. Moisture transport and precipitation from the reanalysis and observations show a good agreement. Precipitable water shows a maximum in late summer whereas precipitation is peaking in winter and spring over Morocco. Moisture transport occurs preferentially in two layers, below and above 850 hPa. The monthly mean precipitable water variation over Morocco is controlled by the upper layer zonal and meridional moisture flux. Precipitation is rather controlled by the lower layer moisture flux and the upper layer meridional flux. The GPS tropospheric gradients show also a consistent seasonal evolution, which is explained by gradients both in the thickness of the troposphere and in the precipitable water vapor. Tropospheric gradients are correlated with moisture fluxes, mostly in the upper layer, and may therefore provide valuable information for meteorology and climatology.en
dc.formatTexten
dc.format.extent1 digital file (p. 273-291)en
dc.format.mimetypeApplication/pdf
dc.identifier.citationKoulali, A., Ouazar, D., Bock, O., & Fadil, A. (2012). Study of seasonal-scale atmospheric water cycle with ground-based GPS receivers, radiosondes and NWP models over Morocco. Atmospheric Research, 104-105, 273-291.doi:10.1016/j.atmosres.2011.11.002en
dc.identifier.issn0169-8095
dc.identifier.urihttp://hdl.handle.net/10625/51494
dc.language.isoen
dc.publisherElsevieren
dc.subjectPRECIPITABLE WATER VAPORen
dc.subjectGLOBAL POSITIONING SYSTEMen
dc.subjectZENITH TOTAL DELAYen
dc.subjectRADIOSONDESen
dc.subjectNCEPen
dc.subjectMOROCCOen
dc.subjectSEASONAL VARIATIONSen
dc.subjectPRECIPITATIONen
dc.titleStudy of seasonal-scale atmospheric water cycle with ground-based GPS receivers, radiosondes and NWP models over Moroccoen
dc.typeJournal Article (peer-reviewed)en
idrc.copyright.holderElsevier B.V.
idrc.dspace.accessIDRC Onlyen
idrc.noaccessDue to copyright restrictions the full text of this research output is not available in the IDRC Digital Library or by request from the IDRC Library. / Compte tenu des restrictions relatives au droit d'auteur, le texte intégral de cet extrant de recherche n'est pas accessible dans la Bibliothèque numérique du CRDI, et il n'est pas possible d'en faire la demande à la Bibliothéque du CRDI.en
idrc.project.componentnumber106372013
idrc.project.number106372
idrc.project.titleInternational Research Initiative on Adaptation to Climate Changeen
idrc.recordsserver.bcsnumberIC01-3527-46
idrc.rims.adhocgroupIDRC SUPPORTEDen

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