2026-09-22T19:24:57Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/106394 2023-07-11 col_2142_5131 col_2142_14839 com_2142_5130 com_2142_14838 com_2142_13459 com_2142_8903

Made available in DSpace on 2020-03-02T22:18:18Z (GMT). No. of bitstreams: 2 CHEN-THESIS-2019.pdf: 2833357 bytes, checksum: 9b6b4005be3724540cc300fa08583ce7 (MD5) LICENSE.txt: 4209 bytes, checksum: fd5cd901df9f8625dfc0b3776c5bc996 (MD5) Previous issue date: 2019-12-11 Hence, Deanna A Chen, Shaowen Amy 2020-03-02T22:18:18Z 2020-03-02T22:18:18Z 2022-03-03T10:15:19Z 2019-12-11 2019-12 Several studies have shown that South America is one of the prime locations for the production of intense hailstorms in the world, with previous research showing South America to be a region of large hail production using TRMM and other satellite proxies. Until recently, there has been limited research on the hail production in Argentina due to a lack of consistent and quality-controlled observations, yet the damage from hail caused approximately $30 million USD in fruit production and $50 million USD in wine production losses annually. This research utilizes Twitter to identify hail events, which are verified using GOES-13 satellite imagery and/or C-band radar signatures in Northern Argentina. ERA-5 reanalysis is then used to reconstruct the environment of giant hail (diameter > 70 mm) events. We found that areas surrounding Córdoba and Mendoza, Argentina have (1) enhanced synoptic-scale ascent through the overlapping of upper-level divergence from two jet streaks downstream of an anomalous trough; (2) a deep layer of moisture supplied from the Amazon basin transport by the South American low-level jet below mid-level cool, dry westerlies; and (3) composite CAPE > 1200 J/kg capped by CIN ~100 J/kg. Even though (1) and (2) are similar to the environment of hailstorms in the U.S., the relatively lower CAPE and higher CIN for giant hail production in Argentina poses interesting questions for future work. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-12-01 The student, Shaowen Chen, accepted the attached license on 2019-12-10 at 22:12. The student, Shaowen Chen, submitted this Thesis for approval on 2019-12-10 at 22:41. This Thesis was approved for publication on 2019-12-11 at 16:01. DSpace SAF Submission Ingestion Package generated from Vireo submission #14782 on 2020-02-28 at 17:24:22 Embargo set by: Seth Robbins for item 113937 Lift date: 2022-03-02T22:18:25Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 113937 on 2022-03-03T10:15:19Z. application/pdf http://hdl.handle.net/2142/106394 en Copyright 2019 Shaowen Chen giant hail hailstorms severe convection Argentina South America Twitter Environments associated with giant hail-producing thunderstorms in Northern Argentina text text Atmospheric Sciences Atmospheric Sciences University of Illinois at Urbana-Champaign Thesis M.S.