Arid
DOI10.1016/j.epsl.2016.02.003
Influence of vegetation type and site-to-site variability on soil carbonate clumped isotope records, Andean piedmont of Central Argentina (32-34 degrees S)
Ringham, Mallory C.1; Hoke, Gregory D.1; Huntington, Katharine W.2; Aranibar, Julieta N.3
通讯作者Ringham, Mallory C.
来源期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
EISSN1385-013X
出版年2016
卷号440页码:1-11
英文摘要

The clumped isotope geothermometer estimates the formation temperature (T(Delta(47))) of carbonates and has great potential to enhance the extraction of environmental data from pedogenic (soil) carbonate in the geologic record. However, the influence of vegetation type and site-specific conditions on carbonate formation processes and T(Delta(47)) records remains poorly understood. This study examines the potential for variability in T(Delta(47)) data between nearby, same elevation sites with different C-3/C-4 biomass. Pedogenic carbonates (undercoatings and nodules) were collected from five modern soil pits in the semi-arid eastern Andean piedmont of Argentina under a summer precipitation regime. Three pits were instrumented with temperature and moisture sensors to 1 m depth, and a fourth was instrumented with additional soil CO2 and atmospheric (temperature, relative humidity, insolation, and rainfall) sensors. T(Delta(47)) values (mean: 30 +/- 6 degrees C (+/- 1SE)) are invariant with depth and are statistically indistinguishable between the four instrumented sites, though a 10 degrees C difference between our T(Delta(47)) values and those of a nearby Peters et al. (2013, EPSL) study suggests the potential for significant site-to-site variability, likely due to local soil hydrology. The results of this study suggest that deeper (>= 40 cm) T(Delta(47)) values are consistent with carbonate formation during the early part of soil drying immediately after large mid-summer rainstorms. Carbonate formation <= 40 cm depth may be biased to soil drying after small, frequent precipitation events occurring throughout the spring, summer, and fall months, averaging to shallow summer T(Delta(47)) values and resulting in a near-isothermal T(Delta(47)) profile. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词pedogenic carbonate clumped isotope thermometry stable isotopes temperature proxy central Andean piedmont paleoclimate
类型Article
语种英语
国家USA ; Argentina
收录类别SCI-E
WOS记录号WOS:000372942600001
WOS关键词PEDOGENIC CARBONATE ; MONTE DESERT ; PRECIPITATION ; TEMPERATURE ; CALCITE ; DEPTH ; CO2
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192287
作者单位1.Syracuse Univ, Earth Sci, Syracuse, NY 13244 USA;
2.Univ Washington, Earth & Space Sci, Seattle, WA 98195 USA;
3.CCT Mendoza, Inst Argentino Nivol Glaciol & Ciencias Ambiental, RA-5500 Mendoza, Argentina
推荐引用方式
GB/T 7714
Ringham, Mallory C.,Hoke, Gregory D.,Huntington, Katharine W.,et al. Influence of vegetation type and site-to-site variability on soil carbonate clumped isotope records, Andean piedmont of Central Argentina (32-34 degrees S)[J],2016,440:1-11.
APA Ringham, Mallory C.,Hoke, Gregory D.,Huntington, Katharine W.,&Aranibar, Julieta N..(2016).Influence of vegetation type and site-to-site variability on soil carbonate clumped isotope records, Andean piedmont of Central Argentina (32-34 degrees S).EARTH AND PLANETARY SCIENCE LETTERS,440,1-11.
MLA Ringham, Mallory C.,et al."Influence of vegetation type and site-to-site variability on soil carbonate clumped isotope records, Andean piedmont of Central Argentina (32-34 degrees S)".EARTH AND PLANETARY SCIENCE LETTERS 440(2016):1-11.
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