A data–model approach to interpreting speleothem oxygen isotope records from monsoon regions

Parker, Sarah E.; Harrison, Sandy P.; Comas-Bru, Laia; Kaushal, Nikita; LeGrande, Allegra N.; Werner, Martin

doi:https://doi.org/10.5194/cp-17-1119-2021

Articles | Volume 17, issue 3

https://doi.org/10.5194/cp-17-1119-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-17-1119-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 3

Research article

|

04 Jun 2021

Research article |

| 04 Jun 2021

A data–model approach to interpreting speleothem oxygen isotope records from monsoon regions

Sarah E. Parker, Sandy P. Harrison, Laia Comas-Bru, Nikita Kaushal, Allegra N. LeGrande, and Martin Werner

Supplement

https://doi.org/10.5194/cp-17-1119-2021-supplement

Data sets

SISAL (Speleothem Isotopes Synthesis and AnaLysis Working Group) database version 2.0 Laia Comas-Bru, Kamolphat Atsawawaranunt, Sandy Harrison, and SISAL working group members https://doi.org/10.17864/1947.256

ECHAM5-wiso simulation data – present-day, mid-Holocene, and Last Glacial Maximum Martin Werner https://doi.org/10.1594/PANGAEA.902347

Simulating climate and stable water isotopes during the last interglacial using a coupled climate-isotope model, link to model results Paul Gierz, Martin Werner, and Gerrit Lohmann https://doi.org/10.1594/PANGAEA.879229

OIPC mean annual δ18Oprecip data Waterisotopes Database http://waterisotopes.org

CRU TS4.01: Climatic Research Unit (CRU) Time-Series (TS) version 4.01 of high-resolution gridded data of month-by-month variation in climate (Jan. 1901-Dec. 2016) I. C. Harris and P. D. Jones https://doi.org/10.5285/58a8802721c94c66ae45c3baa4d814d0

Model code and software

SarahParker44/speleothem_orbital_monsoon_var Sarah Parker https://doi.org/10.5281/zenodo.3875496

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.