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Moisture is Coming - Insights Into Predicting Atmospheric Rivers in Our Future
Moisture is Coming - Insights Into Predicting Atmospheric Rivers in Our Future
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103702
- ISBN
- 9798291573839
- DDC
- 551.5
- 서명/저자
- Moisture is Coming - Insights Into Predicting Atmospheric Rivers in Our Future
- 발행사항
- [Sl] : University of Colorado at Boulder, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 124 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Subramanian, Aneesh.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2025.
- 초록/해제
- 요약The US West Coast is prone to high variability of precipitation, largely due to the occurrences of atmospheric rivers (ARs). ARs are long, narrow filamentary plumes of horizontal water vapor transport in the lower Troposphere that can threaten lives and damage property and infrastructure. It can therefore be beneficial to accurately predict and understand AR activity across various scales to help mitigate risk. This dissertation explores several techniques that can help understand and predict ARs in the climate, subseasonal to seasonal, and medium range (decades, weeks, and days into the future, respectively). Understanding changes to rare extreme AR events in varying climate warming scenarios can be challenging, largely due to the computational cost of both running large-ensemble climate models and tracking ARs in climate data with traditional methods. To help address the computational cost of creating a large ensemble, a unique dataset that used computing power from volunteers' computers was used. A machine learning method, "CG-Climate" was used for AR tracking, which substantially reduced the cost of AR tracking and was demonstrated to consistently detect the same events that other common methods did in reanalysis data. The reliability of CG-Climate enabled the analysis of changes to rare extreme AR events in various climate warming scenarios. In the subseasonal range, the predictability of horizontal vapor transport exceeding the 90th percentile, which is often associated with AR activity, was evaluated in comparison to that of precipitation. The relationship between the North Pacific Jet and IVT in the subseasonal range is also examined to better understand the source of potential predictability. Finally, 1000-member large ensemble of horizontal vapor transport fields is created with diffusion, a method of generating images with artificial intelligence. The diffusion model uses a medium-range deterministic forecast as a condition and creates high-quality realistic images by gradually predicting noise in noisy images and removing it. This approach yielded a promising result that could help aid AR predictions in the future.
- 일반주제명
- Atmospheric sciences
- 일반주제명
- Hydrologic sciences
- 일반주제명
- Geophysics
- 키워드
- Diffusion
- 키워드
- Ensemble
- 키워드
- AR extremes
- 키워드
- Machine learning
- 키워드
- Predictions
- 기타저자
- University of Colorado at Boulder Atmospheric and Oceanic Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103702
■006m o d
■007cr#unu||||||||
■020 ▼a9798291573839
■035 ▼a(MiAaPQ)AAI32113089
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a551.5
■1001 ▼aHiggins, Timothy Brown.▼0(orcid)0000-0002-2204-9193
■24510▼aMoisture is Coming - Insights Into Predicting Atmospheric Rivers in Our Future
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a124 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Subramanian, Aneesh.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2025.
■520 ▼aThe US West Coast is prone to high variability of precipitation, largely due to the occurrences of atmospheric rivers (ARs). ARs are long, narrow filamentary plumes of horizontal water vapor transport in the lower Troposphere that can threaten lives and damage property and infrastructure. It can therefore be beneficial to accurately predict and understand AR activity across various scales to help mitigate risk. This dissertation explores several techniques that can help understand and predict ARs in the climate, subseasonal to seasonal, and medium range (decades, weeks, and days into the future, respectively). Understanding changes to rare extreme AR events in varying climate warming scenarios can be challenging, largely due to the computational cost of both running large-ensemble climate models and tracking ARs in climate data with traditional methods. To help address the computational cost of creating a large ensemble, a unique dataset that used computing power from volunteers' computers was used. A machine learning method, "CG-Climate" was used for AR tracking, which substantially reduced the cost of AR tracking and was demonstrated to consistently detect the same events that other common methods did in reanalysis data. The reliability of CG-Climate enabled the analysis of changes to rare extreme AR events in various climate warming scenarios. In the subseasonal range, the predictability of horizontal vapor transport exceeding the 90th percentile, which is often associated with AR activity, was evaluated in comparison to that of precipitation. The relationship between the North Pacific Jet and IVT in the subseasonal range is also examined to better understand the source of potential predictability. Finally, 1000-member large ensemble of horizontal vapor transport fields is created with diffusion, a method of generating images with artificial intelligence. The diffusion model uses a medium-range deterministic forecast as a condition and creates high-quality realistic images by gradually predicting noise in noisy images and removing it. This approach yielded a promising result that could help aid AR predictions in the future.
■590 ▼aSchool code: 0051.
■650 4▼aAtmospheric sciences
■650 4▼aHydrologic sciences
■650 4▼aGeophysics
■653 ▼aAtmospheric rivers
■653 ▼aDiffusion
■653 ▼aEnsemble
■653 ▼aAR extremes
■653 ▼aMachine learning
■653 ▼aPredictions
■690 ▼a0725
■690 ▼a0388
■690 ▼a0800
■690 ▼a0373
■71020▼aUniversity of Colorado at Boulder▼bAtmospheric and Oceanic Sciences.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358231▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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