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Impacts of Storm Track Variations on Extreme Weather Events and Moisture Budgets over the United States
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Impacts of Storm Track Variations on Extreme Weather Events and Moisture Budgets over the United States. |
| 개인저자 | Ma, Chengeng. |
| 단체저자명 | State University of New York at Stony Brook. Marine and Atmospheric Science. |
| 발행사항 | [S.l.]: State University of New York at Stony Brook., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 202 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-05B. Dissertation Abstract International |
| ISBN | 9781687931870 |
| 학위논문주기 | Thesis (Ph.D.)--State University of New York at Stony Brook, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-05, Section: B.
Includes supplementary digital materials. Advisor: Chang, Edmund K. M. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Extratropical cyclones are responsible for many of the high-impact weather events in winter over the United States. In summer, the lack of cyclone activity is associated with droughts and extreme heats. In this study, the impacts from the variations of cyclone activity on these extreme events are examined and the physical mechanisms are explored. Increased cyclone activity enhances the frequency of extreme cold and high wind events over much of the U.S., and impacts extreme precipitation around the Ohio River Valley and Northwestern U.S., consistent with teleconnections like PNA and ENSO. We compare the dynamics governing extreme precipitation in Ohio Valley and Northwestern U.S. In the Ohio Valley, extreme precipitation is associated with mid-latitude synoptic-scale convergence northeast of cyclones and a southwestward oriented ridge near the Atlantic coast that drives strong water vapor transport from the Gulf of Mexico into the Ohio Valley. In the northwestern U.S., extreme precipitation is associated with a cyclonic and anti-cyclonic circulation pair aligned northwest to southeast, which together drive a long and strong moisture transport corridor from the lower latitude of the Central Pacific towards the Northwestern U.S., where the air is forced to climb mountains and the vapor is cooled into liquid water. In summer, decrease in cyclone activity will lead to decrease in cloud cover which reflects the incoming solar energy, giving rise to higher maximum temperature near the surface. We also show that climate models may have biases in simulating this relationship, potentially underestimating the impacts of cyclone decrease on accentuating the future increase in maximum temperature. The physical mechanisms we highlighted help us to understand why climate models are good or not good at simulating extreme precipitation in winter and extreme temperature in summer. |
| 일반주제명 | Atmospheric sciences. |
| 언어 | 영어 |
| 바로가기 | 
: 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
