Mixed Signals From the Stable Isotope Composition of Precipitation and Plant Waxes in the Northern Tropical Andes

Pérez‐Angel, Lina C.; Sepúlveda, Julio; Montes, Camilo; Smith, Jamila J.; Molnar, Peter; González‐Arango, Catalina; Snell, Kathryn E.; Dildar, Nadia

doi:10.1029/2022jg006932

i

Mixed Signals From the Stable Isotope Composition of Precipitation and Plant Waxes in the Northern Tropical Andes

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2022
By Pérez‐Angel, Lina C. ; Sepúlveda, Julio ; Montes, Camilo ; ...

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Journal Title:

Journal of Geophysical Research: Biogeosciences
Personal Author:

Pérez‐Angel, Lina C. ; Sepúlveda, Julio ; Montes, Camilo ; Smith, Jamila J. ; Molnar, Peter ; González‐Arango, Catalina ; Snell, Kathryn E. ; Dildar, Nadia
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; NCEI (National Centers for Environmental Information)
Description:

We evaluate the efficacy of the stable isotope composition of precipitation and plant waxes as proxies for paleoaltimetry and paleohydrology in the northern tropical Andes. We report monthly hydrogen (δ 2Hp) and oxygen (δ 18Op) isotope values of precipitation for an annual cycle, and hydrogen isotope values of plant waxes (δ 2Hwax) obtained from modern soils along the eastern and western flanks of the Eastern Cordillera of Colombia. δ 2Hp, δ 18Op, as well as the unweighted mean δ 2Hwax values of n-C29, n-C31, and n-C33 n-alkanes in the eastern flank show a dependence on elevation ( R 2 = 0.90, 0.82, and 0.65, respectively). In stark contrast, the stable isotope compositions of neither precipitation nor plant waxes from the western flank correlate with
Keywords:

Aquatic Science Atmospheric Science Ecology Forestry Paleontology Soil Science Water Science And Technology Water Science And Technology Water Science And Technology
Source:

Journal of Geophysical Research: Biogeosciences, 127(12)
DOI:

https://doi.org/10.1029/2022jg006932
ISSN:

2169-8953 ; 2169-8961
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PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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urn:sha256:3f8b5419646b098a86bc42ff592b53f6070eef06e492da2a8cd341ffcd716ec2
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https://repository.library.noaa.gov/view/noaa/54330/noaa_54330_DS1.pdf
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[PDF - 2.03 MB ]

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