Articles | Volume 16, issue 1
https://doi.org/10.5194/cp-16-17-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-16-17-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Jan 2020
Research article |
| 07 Jan 2020
| 07 Jan 2020
Experimental evaluation of oxygen isotopic exchange between inclusion water and host calcite in speleothems
Graduate School of Environmental Studies, Nagoya University,
Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
Yudai Kina
Department of Chemistry, Biology, and Marine Science, Faculty of
Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213,
Japan
Chuan-Chou Shen
High-Precision Mass Spectrometry and Environment Change Laboratory
(HISPEC), Department of Geosciences, National Taiwan University, Taipei
10617, Taiwan
Research Center for Future Earth, National Taiwan University, Taipei
10617, Taiwan
Global Change Research Center, National Taiwan University, Taipei
10617, Taiwan
Kanako Omine
Department of Chemistry, Biology, and Marine Science, Faculty of
Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213,
Japan
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Subject: Proxy Use-Development-Validation | Archive: Terrestrial Archives | Timescale: Milankovitch
A data–model approach to interpreting speleothem oxygen isotope records from monsoon regions
Surface paleothermometry using low-temperature thermoluminescence of feldspar
Water pH and temperature in Lake Biwa from MBT'/CBT indices during the last 280 000 years
Petrophysical characterization of the lacustrine sediment succession drilled in Lake El'gygytgyn, Far East Russian Arctic
Climate in continental interior Asia during the longest interglacial of the past 500 000 years: the new MIS 11 records from Lake Baikal, SE Siberia
Sarah E. Parker, Sandy P. Harrison, Laia Comas-Bru, Nikita Kaushal, Allegra N. LeGrande, and Martin Werner
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Short summary
Short summary
Regional trends in the oxygen isotope (δ18O) composition of stalagmites reflect several climate processes. We compare stalagmite δ18O records from monsoon regions and model simulations to identify the causes of δ18O variability over the last 12 000 years, and between glacial and interglacial states. Precipitation changes explain the glacial–interglacial δ18O changes in all monsoon regions; Holocene trends are due to a combination of precipitation, atmospheric circulation and temperature changes.
Rabiul H. Biswas, Frédéric Herman, Georgina E. King, Benjamin Lehmann, and Ashok K. Singhvi
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A new approach to reconstruct the temporal variation of rock surface temperature using the thermoluminescence (TL) of feldspar is introduced. Multiple TL signals or thermometers in the range of 210 to 250 °C are sensitive to typical surface temperature fluctuations and can be used to constrain thermal histories of rocks over ~50 kyr. We show that it is possible to recover thermal histories of rocks using inverse modeling and with δ18O anomalies as a priori information.
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https://doi.org/10.1126/science.1163965, 2008.
Short summary
The oxygen isotopic ratio of water in fluid inclusions in speleothems is an important proxy for the changes in past hydroclimate and temperatures. This isotopic ratio, however, may be affected by isotopic exchange between the water and the host calcite. Here we evaluate this exchange reaction based on a laboratory experiment. We demonstrated that the exchange was detectable but not significant for temperature reconstruction, likely because the reaction occurred only with a thin calcite layer.
The oxygen isotopic ratio of water in fluid inclusions in speleothems is an important proxy for...
