globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-014-2140-6
Scopus记录号: 2-s2.0-84906099769
论文题名:
Climate controls on rainfall isotopes and their effects on cave drip water and speleothem growth: The case of Molinos cave (Teruel, NE Spain)
作者: Moreno A.; Sancho C.; Bartolomé M.; Oliva-Urcia B.; Delgado-Huertas A.; Estrela M.J.; Corell D.; López-Moreno J.I.; Cacho I.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期:2017-01-02
起始页码: 221
结束页码: 241
语种: 英语
英文关键词: Cave monitoring ; Iberian Peninsula ; Oxygen isotopes ; Rainfall
英文摘要: The interpretation of stable isotopes in speleothems in terms of past temperature variability or precipitation rates requires a comprehensive understanding of the climatic factors and processes that influence the δ18O signal in the way through the atmosphere to the cave, where carbonate precipitates acquiring its final isotopic composition. This study presents for the first time in the Iberia Peninsula an integrated analysis of the isotopic composition of rainfall (δ18Op) during 2010-2012 years and, through a detailed monitoring survey, the transference of the primary isotopic signal throughout the soil and epikarst into the Molinos cave (Teruel, NE Spain). Both air temperature and amount of precipitation have an important effect on δ18Op values, clearly imprinting a seasonal variability modulated by an amount effect when rainfall events are more frequent or intense. Air mass history and atmospheric circulation influences are considered through the study of weather types, synoptic-scale climate patterns and large-scale atmospheric circulation indexes (North Atlantic Oscillation and Western Mediterranean Oscillation) revealing a dominant source effect on δ18Op values in this region where tropical North Atlantic and Western Mediterranean are the two moisture source regions. A delay of 2-3 months occurs between the dripwater oxygen isotopic composition (δ18Od) respect to δ18Op values as a consequence of large residence time in the epikarst. Limited calcite precipitates are found from winter to spring when δ18Od values are less negative and dripwater rates are constant. This study suggests that NE Iberian δ18Ocalcite proxy records are best interpreted as reflecting a combination of parameters, not just paleotemperature or paleorainfall and, if extending present-day situation towards the recent past, a biased signal towards winter values should be expected in Molinos speleothem records. © 2014 Springer-Verlag Berlin Heidelberg.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54588
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geoenvironmental Processes and Global Change, Pyrenean Institute of Ecology, CSIC, Avda. Montañana 1005, 50059 Saragossa, Spain; Earth Sciences Department, University of Zaragoza, C/Pedro Cerbuna 12, 50009 Saragossa, Spain; Stable Isotope Biogeochemistry Laboratory, IACT-CSIC, Avda. de Las Palmeras no 4, 18100 Armilla, Granada, Spain; Instituto Universitario Centro de Estudios Ambientales del Mediterráneo (CEAM), C/Charles Darwin, 14, 46980 Paterna, Valencia, Spain; CRG Marine Geosciences, Department of Stratigraphy, Paleontology and Marine Geosciences, University of Barcelona, C/Martí i Franqués, s/no, 08028 Barcelona, Spain; Department of Geology and Geochemistry, Autonomous University of Madrid, Ciudad Universitaria de Cantoblanco, 28049 Madrid, Spain

Recommended Citation:
Moreno A.,Sancho C.,Bartolomé M.,et al. Climate controls on rainfall isotopes and their effects on cave drip water and speleothem growth: The case of Molinos cave (Teruel, NE Spain)[J]. Climate Dynamics,2014-01-01,43(2017-01-02)
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