Large-scale characteristics of the 1993 United States midwestern great flood and its simulation by the MM5 mesocale model

Persistent Link:
http://hdl.handle.net/10150/288874
Title:
Large-scale characteristics of the 1993 United States midwestern great flood and its simulation by the MM5 mesocale model
Author:
Hwu, Wenje, 1964-
Issue Date:
1998
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The record-breaking flood of 1993 provides an excellent opportunity to address many issues to the interest of GCIP-Mississippi: the large-scale characteristics of the hydrometeorology, the predictability of ECMWF model, and the sensitivity of mesoscale simulation. The effects of meridional and zonal vapor transport on precipitation production have been examined in the observation as well as in the ECMWF/TOGA and ERA data. Components of atmospheric and terrestrial water balance were compared. Cloud water change/flux activity, convection feature, diurnal variation, and land-atmospheric interaction were investigated, and intercompared among the three data sets. The intercomparison has demonstrated partial improvement from TOGA to ERA. It also indicates possible internal inconsistencies in the ERA, the ability and inability of simulating large-scale or mean fields and fine-scale extremes. It reveals the impacts of the new soil hydrology and boundary layer schemes in ERA in warmer and winter times, and the possible influence on surface hydrology. A 9.5-day (28 June to 7 July 1993) simulation study by the Penn State/NCAR MM5 mesoscale model, with the help of enhanced IR images from GOES satellite data was carried out. The sensitivity of MCS simulations to different cumulus parameterization schemes and explicit moisture schemes was investigated. The model is considerably skillful in the environmental steering wind direction, but greatly limited in the orthogonal direction. The model could not reproduce the "last-hour" rain--an extraordinary MCC, indicating that the model lacks representation of the mechanisms responsible for modifying the environmental controls on the evolution of long-lived MCSs, particularly after the system reaches its maximum extent.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Hydrology.; Physics, Atmospheric Science.; Environmental Sciences.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Hydrology and Water Resources
Degree Grantor:
University of Arizona
Advisor:
Sorooshian, Soroosh

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleLarge-scale characteristics of the 1993 United States midwestern great flood and its simulation by the MM5 mesocale modelen_US
dc.creatorHwu, Wenje, 1964-en_US
dc.contributor.authorHwu, Wenje, 1964-en_US
dc.date.issued1998en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe record-breaking flood of 1993 provides an excellent opportunity to address many issues to the interest of GCIP-Mississippi: the large-scale characteristics of the hydrometeorology, the predictability of ECMWF model, and the sensitivity of mesoscale simulation. The effects of meridional and zonal vapor transport on precipitation production have been examined in the observation as well as in the ECMWF/TOGA and ERA data. Components of atmospheric and terrestrial water balance were compared. Cloud water change/flux activity, convection feature, diurnal variation, and land-atmospheric interaction were investigated, and intercompared among the three data sets. The intercomparison has demonstrated partial improvement from TOGA to ERA. It also indicates possible internal inconsistencies in the ERA, the ability and inability of simulating large-scale or mean fields and fine-scale extremes. It reveals the impacts of the new soil hydrology and boundary layer schemes in ERA in warmer and winter times, and the possible influence on surface hydrology. A 9.5-day (28 June to 7 July 1993) simulation study by the Penn State/NCAR MM5 mesoscale model, with the help of enhanced IR images from GOES satellite data was carried out. The sensitivity of MCS simulations to different cumulus parameterization schemes and explicit moisture schemes was investigated. The model is considerably skillful in the environmental steering wind direction, but greatly limited in the orthogonal direction. The model could not reproduce the "last-hour" rain--an extraordinary MCC, indicating that the model lacks representation of the mechanisms responsible for modifying the environmental controls on the evolution of long-lived MCSs, particularly after the system reaches its maximum extent.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectHydrology.en_US
dc.subjectPhysics, Atmospheric Science.en_US
dc.subjectEnvironmental Sciences.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorSorooshian, Sorooshen_US
dc.identifier.proquest9901697en_US
dc.identifier.bibrecord.b38826227en_US
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