globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2017.10.020
Scopus记录号: 2-s2.0-85033588245
论文题名:
Triple oxygen and hydrogen isotopes of gypsum hydration water for quantitative paleo-humidity reconstruction
作者: Gázquez F.; Morellón M.; Bauska T.; Herwartz D.; Surma J.; Moreno A.; Staubwasser M.; Valero-Garcés B.; Delgado-Huertas A.; Hodell D.A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 481
起始页码: 177
结束页码: 188
语种: 英语
英文关键词: gypsum hydration water ; lake sediments ; Late Glacial–Holocene transition ; relative humidity ; triple oxygen isotopes ; Younger Dryas
Scopus关键词: Glacial geology ; Gypsum ; Hydration ; Intelligent systems ; Isotopes ; Lakes ; Monte Carlo methods ; Oxygen ; Uncertainty analysis ; Holocenes ; Hydration water ; Lake sediments ; Triple oxygen isotopes ; Younger Dryas ; Atmospheric humidity ; gypsum ; Holocene ; hydration ; hydrogen isotope ; lacustrine deposit ; late glacial ; oxygen isotope ; paleoenvironment ; quantitative analysis ; reconstruction ; relative humidity ; Younger Dryas
英文摘要: Atmospheric relative humidity is an important parameter affecting vegetation yet paleo-humidity proxies are scarce and difficult to calibrate. Here we use triple oxygen (δ17O and δ18O) and hydrogen (δD) isotopes of structurally-bound gypsum hydration water (GHW) extracted from lacustrine gypsum to quantify past changes in atmospheric relative humidity. An evaporation isotope-mass-balance model is used together with Monte Carlo simulations to determine the range of climatological conditions that simultaneously satisfy the stable isotope results of GHW, and with statistically robust estimates of uncertainty. We apply this method to reconstruct the isotopic composition of paleo-waters of Lake Estanya (NE Spain) and changes in normalized atmospheric relative humidity (RHn) over the last glacial termination and Holocene (from ∼15 to 0.6 cal. kyrs BP). The isotopic record indicates the driest conditions occurred during the Younger Dryas (YD; ∼12–13 cal. kyrs BP). We estimate a RHn of ∼40–45% during the YD, which is ∼30–35% lower than today. Because of the southward displacement of the Polar Front to ∼42°N, it was both windier and drier during the YD than the Bølling–Allerød period and Holocene. Mean atmospheric moisture gradually increased from the Preboreal to Early Holocene (∼11 to 8 cal. kyrs BP, 50–60%), reaching 70–75% RHn from ∼7.5 cal. kyrs BP until present-day. We demonstrate that combining hydrogen and triple oxygen isotopes in GHW provides a powerful tool for quantitative estimates of past changes in relative humidity. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110181
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom; CITIMAC, Facultad de Ciencias, University of Cantabria, Avenida de los Castros s/n, Santander, 39005, Spain; Institute für Geology und Mineralogy, Universität zu Köln, Greinstrasse, 4-6, Köln, 50939, Germany; Department of Environmental Processes and Global Change, Pyrenean Institute of Ecology (IPE) – CSIC, Campus de Aula Dei, Avenida Montañana, 1005, Zaragoza, E-50059, Spain; Laboratorio de Biogeoquímica de Isotopos Estables, Instituto Andaluz de Ciencias de la Tierra IACT (CSIC-UGR), Avda. de las Palmeras, 4, Armilla, Granada 18100, Spain

Recommended Citation:
Gázquez F.,Morellón M.,Bauska T.,et al. Triple oxygen and hydrogen isotopes of gypsum hydration water for quantitative paleo-humidity reconstruction[J]. Earth and Planetary Science Letters,2018-01-01,481
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