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Hydrological modeling of stalagmite d18O response to glacial-interglacial transitions


Baker, A and Bradley, C and Phipps, SJ, Hydrological modeling of stalagmite d18O response to glacial-interglacial transitions, Geophysical Research Letters, 40, (12) pp. 3207-3212. ISSN 0094-8276 (2013) [Refereed Article]


Copyright Statement

Copyright 2013 American Geophysical Union

DOI: doi:10.1002/grl.50555


 Stalagmite δ18Ο series currently provide the most robustly dated characterization of glacial terminations. However, uncertainties associated with the stalagmite δ18Ο proxy record arise due to the complexity of flow within karst aquifers. Here we use an integrated climate-soil-groundwater lumped parameter hydrological model to demonstrate the range of potential stalagmite δ18Ο hydrological responses to significant global climate changes. Pseudoproxy stalagmite δ18Ο series were generated for millennial length model simulations, using general circulation model time-slice data for 12, 11, and 10 ka for eastern China. Our model demonstrates that the variability within published δ18Ο records from Chinese stalagmites falls within that of modeled pseudoproxy series. We utilize model output to (i) quantify hydrological uncertainty (specifically the relative importance of changing precipitation amount, isotopic composition, and water balance); (ii) identify any nonstationarity in δ18O variability and its relationship to climate change; and (iii) demonstrate the processes that produce low-frequency power in stalagmite δ18Ο.

Item Details

Item Type:Refereed Article
Keywords:climate models, forward models, palaeoclimate, stalagmites, isotopes, glacial-interglacial transitions, China
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Palaeoclimatology
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Climate change models
UTAS Author:Phipps, SJ (Dr Steven Phipps)
ID Code:104723
Year Published:2013
Web of Science® Times Cited:15
Deposited By:IMAS Research and Education Centre
Deposited On:2015-11-18
Last Modified:2017-10-30
Downloads:178 View Download Statistics

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