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Rainfall Variability, Extreme Events, and Climate Information in the Central American Dry Corridor
Rainfall Variability, Extreme Events, and Climate Information in the Central American Dry ...
Rainfall Variability, Extreme Events, and Climate Information in the Central American Dry Corridor

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자료유형  
 학위논문 서양
최종처리일시  
20250211151323
ISBN  
9798382314457
DDC  
910
저자명  
Anderson, Talia Grace.
서명/저자  
Rainfall Variability, Extreme Events, and Climate Information in the Central American Dry Corridor
발행사항  
[Sl] : The University of Arizona, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
176 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
주기사항  
Advisor: Anchukaitis, Kevin.
학위논문주기  
Thesis (Ph.D.)--The University of Arizona, 2024.
초록/해제  
요약Central America is consistently identified as a global hotspot for future anthropogenic climate change and is already exposed to considerable natural climate variability and frequent extreme events including tropical storms, heavy flooding, and drought. Pervasive inequalities and systemic vulnerabilities exacerbate the impacts of climate variability and change, especially for the millions of families who rely on rainfed agriculture throughout the region. This is particularly true for the Central American Dry Corridor, a region marked by less rainfall and more frequent dry spells in comparison to the rest of Central America. While projections for 21st century drying due to anthropogenic climate change are robust throughout Central America, internal climate variability is expected to dominate precipitation anomalies for the next several decades and very few locations have had significant or consistent changes in precipitation. However, smallholder farmers in the Guatemalan Dry Corridor have reported recent changes in the distribution and intensity of rainfall, making it harder to predict and contributing to crop losses and decreased production of food staples in recent years. Reducing uncertainty in near-term and future climate variability and change is therefore essential for mitigating climate risk and for improving hazard reduction, resource management, and agricultural decision-making throughout the region. This in part hinges on the production and dissemination of accurate and usable climate information. By combining instrumental climate data, smallholder farmers' observations of climate variability, and precipitation forecasts from climate models, my dissertation seeks to reduce some of these uncertainties. Expanding on this objective, I integrate these sources of information to (1) systematically assess how rainfall variability and extreme precipitation events in the Dry Corridor are changing, (2) determine the relevance of climate variability and change for agricultural decision-making within heterogeneous socio-environmental systems, and (3) evaluate the quality, use of, and access to climate information within these systems. I conclude that natural climate variability continues to be a predominant driver of Central American rainfall patterns, but that analyses at smaller scales reveal regional differences and the importance of evaluating an array of climate metrics that capture distinct features of precipitation variability. I also highlight the role of farmers' observations of rainfall variability in agricultural decision-making and how this influence is mediated by other factors. Finally, I show that the technical quality of climate information related to seasonal climate forecasts provides evidence of skill, depending on the region and metric, but that the use and value of this information remains low among smallholder farmers throughout the region. This dissertation underscores the need for multi-scalar, interdisciplinary studies to develop a better understanding of current and future climate patterns and risks in order to support more informed decision-making and adaptation to climate change.
일반주제명  
Geography
일반주제명  
Climate change
일반주제명  
Atmospheric sciences
키워드  
Adaptation
키워드  
Agriculture
키워드  
Central America
키워드  
Climate services
키워드  
Climate variability and change
키워드  
Dry Corridor
기타저자  
The University of Arizona Geography
기본자료저록  
Dissertations Abstracts International. 85-10B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■020    ▼a9798382314457
■035    ▼a(MiAaPQ)AAI31239687
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a910
■1001  ▼aAnderson,  Talia  Grace.▼0(orcid)0000-0002-0559-566X
■24510▼aRainfall  Variability,  Extreme  Events,  and  Climate  Information  in  the  Central  American  Dry  Corridor
■260    ▼a[Sl]▼bThe  University  of  Arizona▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a176  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-10,  Section:  B.
■500    ▼aAdvisor:  Anchukaitis,  Kevin.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Arizona,  2024.
■520    ▼aCentral  America  is  consistently  identified  as  a  global  hotspot  for  future  anthropogenic  climate  change  and  is  already  exposed  to  considerable  natural  climate  variability  and  frequent  extreme  events  including  tropical  storms,  heavy  flooding,  and  drought.  Pervasive  inequalities  and  systemic  vulnerabilities  exacerbate  the  impacts  of  climate  variability  and  change,  especially  for  the  millions  of  families  who  rely  on  rainfed  agriculture  throughout  the  region.  This  is  particularly  true  for  the  Central  American  Dry  Corridor,  a  region  marked  by  less  rainfall  and  more  frequent  dry  spells  in  comparison  to  the  rest  of  Central  America.  While  projections  for  21st  century  drying  due  to  anthropogenic  climate  change  are  robust  throughout  Central  America,  internal  climate  variability  is  expected  to  dominate  precipitation  anomalies  for  the  next  several  decades  and  very  few  locations  have  had  significant  or  consistent  changes  in  precipitation.  However,  smallholder  farmers  in  the  Guatemalan  Dry  Corridor  have  reported  recent  changes  in  the  distribution  and  intensity  of  rainfall,  making  it  harder  to  predict  and  contributing  to  crop  losses  and  decreased  production  of  food  staples  in  recent  years.  Reducing  uncertainty  in  near-term  and  future  climate  variability  and  change  is  therefore  essential  for  mitigating  climate  risk  and  for  improving  hazard  reduction,  resource  management,  and  agricultural  decision-making  throughout  the  region.  This  in  part  hinges  on  the  production  and  dissemination  of  accurate  and  usable  climate  information.  By  combining  instrumental  climate  data,  smallholder  farmers'  observations  of  climate  variability,  and  precipitation  forecasts  from  climate  models,  my  dissertation  seeks  to  reduce  some  of  these  uncertainties.  Expanding  on  this  objective,  I  integrate  these  sources  of  information  to  (1)  systematically  assess  how  rainfall  variability  and  extreme  precipitation  events  in  the  Dry  Corridor  are  changing,  (2)  determine  the  relevance  of  climate  variability  and  change  for  agricultural  decision-making  within  heterogeneous  socio-environmental  systems,  and  (3)  evaluate  the  quality,  use  of,  and  access  to  climate  information  within  these  systems.  I  conclude  that  natural  climate  variability  continues  to  be  a  predominant  driver  of  Central  American  rainfall  patterns,  but  that  analyses  at  smaller  scales  reveal  regional  differences  and  the  importance  of  evaluating  an  array  of  climate  metrics  that  capture  distinct  features  of  precipitation  variability.  I  also  highlight  the  role  of  farmers'  observations  of  rainfall  variability  in  agricultural  decision-making  and  how  this  influence  is  mediated  by  other  factors.  Finally,  I  show  that  the  technical  quality  of  climate  information  related  to  seasonal  climate  forecasts  provides  evidence  of  skill,  depending  on  the  region  and  metric,  but  that  the  use  and  value  of  this  information  remains  low  among  smallholder  farmers  throughout  the  region.  This  dissertation  underscores  the  need  for  multi-scalar,  interdisciplinary  studies  to  develop  a  better  understanding  of  current  and  future  climate  patterns  and  risks  in  order  to  support  more  informed  decision-making  and  adaptation  to  climate  change.
■590    ▼aSchool  code:  0009.
■650  4▼aGeography
■650  4▼aClimate  change
■650  4▼aAtmospheric  sciences
■653    ▼aAdaptation
■653    ▼aAgriculture
■653    ▼aCentral  America
■653    ▼aClimate  services
■653    ▼aClimate  variability  and  change
■653    ▼aDry  Corridor
■690    ▼a0366
■690    ▼a0404
■690    ▼a0725
■71020▼aThe  University  of  Arizona▼bGeography.
■7730  ▼tDissertations  Abstracts  International▼g85-10B.
■790    ▼a0009
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161197▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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