Characterization of Large Hailstone Growth Using Stable Isotopes

dc.contributor.advisorGao, Yongli
dc.contributor.advisorAckley, Stephen F.
dc.contributor.authorNordstrand, Thomas Edward
dc.contributor.committeeMemberWeissling, Blake
dc.contributor.committeeMemberDatta, Saugata
dc.creator.orcidhttps://orcid.org/0000-0003-0396-238X
dc.date.accessioned2024-02-12T18:28:57Z
dc.date.available2024-02-12T18:28:57Z
dc.date.issued2021
dc.descriptionThis item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.
dc.description.abstractThe stable isotope composition of a hailstone is related to the source and transport of moisture, atmospheric temperature, cloud droplet, and vapor conditions that occur at crystallization into ice. The isotope content of cloud water is preserved as it transitions from the liquid to solid phase on a hailstone. Water isotope fractionation therefore is an indicator for assessing flow path and accretion mechanisms of hail as it forms in supercell thunderstorms. The stable isotope values such as δD can be used as indicator of cloud temperature and therefore altitude of hailstone formation. δD values obtained from the layers across a hailstone section therefore aid in defining the origin and trajectory of the hailstone through the storm event. Two separate hail events at Burkburnett and Del Rio, Texas in the spring of 2020, both provided greater than 5 cm (2 inch) diameter hailstone samples in this study. Sixteen hailstones from these two events have been dissected at nominal 0.5 cm intervals, providing 254 subsamples of melt water for isotopic analysis together with thin sections for ice structure analysis. Hailstone isotopic analysis with the ice structure microphotographs were used as proxies to determine the deposition of cloud water as a glaze layer was added. Results were compared to radar soundings of the two storms and made possible ground truthing of hail size and location estimates. The goal of this research is to provide better information on hail formation and growth within clouds that will contribute to storm prediction, warning and risk mitigation of hailstorms.
dc.description.departmentGeosciences
dc.format.extent139 pages
dc.format.mimetypeapplication/pdf
dc.identifier.isbn9798759968559
dc.identifier.urihttps://hdl.handle.net/20.500.12588/4739
dc.languageen
dc.subjectBurkburnett
dc.subjectDel Rio
dc.subjectdeuterium
dc.subjectHail
dc.subjectIsotopes
dc.subjectoxygen 18
dc.subject.classificationGeology
dc.titleCharacterization of Large Hailstone Growth Using Stable Isotopes
dc.typeThesis
dc.type.dcmiText
dcterms.accessRightspq_closed
thesis.degree.departmentGeosciences
thesis.degree.grantorUniversity of Texas at San Antonio
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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