DOI: 10.1016/j.quascirev.2015.08.028
Scopus记录号: 2-s2.0-84949676231
论文题名: Key drivers controlling stable isotope variations in daily precipitation of Costa Rica: Caribbean Sea versus Eastern Pacific Ocean moisture sources
作者: Sánchez-Murillo R. ; Birkel C. ; Welsh K. ; Esquivel-Hernández G. ; Corrales-Salazar J. ; Boll J. ; Brooks E. ; Roupsard O. ; Sáenz-Rosales O. ; Katchan I. ; Arce-Mesén R. ; Soulsby C. ; Araguás-Araguás L.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 131 起始页码: 250
结束页码: 261
语种: 英语
英文关键词: Air mass back trajectories
; Costa Rica
; Precipitation
; Sounding profiles
; Stable isotopes
Scopus关键词: Atmospheric humidity
; Balloons
; Coastal zones
; Decision trees
; Fighter aircraft
; Groundwater
; Groundwater resources
; Humidity control
; Information management
; Isotopes
; Linear regression
; Moisture
; Oceanography
; Precipitation (chemical)
; Regression analysis
; Water resources
; Air mass back trajectories
; Atmospheric circulation patterns
; Costa Rica
; Intertropical convergence zone
; Multiple linear regression models
; Regional circulation models
; Sounding profiles
; Stable isotopes
; Atmospheric movements
; air mass
; atmospheric circulation
; atmospheric moisture
; atmospheric transport
; circulation modeling
; isotopic composition
; microclimate
; precipitation (climatology)
; stable isotope
; Atlantic Ocean
; Caribbean Sea
; Cartago
; Costa Rica
; Heredia
; Pacific Ocean
; Pacific Ocean (East)
; Turrialba
英文摘要: Costa Rica is located on the Central American Isthmus, which receives moisture inputs directly from the Caribbean Sea and the Eastern Pacific Ocean. This location includes unique mountainous and lowland microclimates, but only limited knowledge exists about the impact of relief and regional atmospheric circulation patterns on precipitation origin, transport, and isotopic composition. Therefore, the main scope of this project is to identify the key drivers controlling stable isotope variations in daily-scale precipitation of Costa Rica. The monitoring sites comprise three strategic locations across Costa Rica: Heredia (Central Valley), Turrialba (Caribbean slope), and Caño Seco (South Pacific slope). Sporadic dry season rain is mostly related to isolated enriched events ranging from -5.8‰ to -0.9‰ δ18O. By mid-May, the Intertropical Convergence Zone reaches Costa Rica resulting in a notable depletion in isotope ratios (up to -18.5‰ δ18O). HYSPLIT air mass back trajectories indicate the strong influence on the origin and transport of precipitation of three main moisture transport mechanisms, the Caribbean Low Level Jet, the Colombian Low Level Jet, and localized convection events. Multiple linear regression models constructed based on Random Forests of surface meteorological information and atmospheric sounding profiles suggest that lifted condensation level and surface relative humidity are the main factors controlling isotopic variations. These findings diverge from the recognized 'amount effect' in monthly composite samples across the tropics. Understanding of stable isotope dynamics in tropical precipitation can be used to a) enhance groundwater modeling efforts in ungauged basins where scarcity of long-term monitoring data drastically limit current and future water resources management, b) improve the re-construction of paleoclimatic records in the Central American land bridge, c) calibrate and validate regional circulation models. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59726
Appears in Collections: 过去全球变化的重建
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作者单位: Stable Isotope Research Group, National University of Costa Rica, Heredia, Costa Rica; Escuela de Geografía, Universidad de Costa Rica, Costa Rica; Northern Rivers Institute, University of Aberdeen, Aberdeen, Scotland, United Kingdom; University of Idaho, Moscow, ID, United States; Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba, Costa Rica; Washington State University, Pullman, WA, United States; CIRAD, UMR Ecologie Fonctionelle and Biogéochimie des Sols et des Agro-ecosystemes, Montpellier, France; Centro Nacional de Alta Tecnología, San José, Costa Rica; Isotope Hydrology Section, International Atomic Energy Agency, Vienna International Centre, PO Box 100, Vienna, Austria
Recommended Citation:
Sánchez-Murillo R.,Birkel C.,Welsh K.,et al. Key drivers controlling stable isotope variations in daily precipitation of Costa Rica: Caribbean Sea versus Eastern Pacific Ocean moisture sources[J]. Quaternary Science Reviews,2016-01-01,131