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Asian monsoon hydrometeorology from TES and SCIAMACHY water vapor isotope measurements and LMDZ simulations: Implications for speleothem climate record interpretation

Lee, Jung-Eun and Risi, Camille and Fung, Inez and Worden, John and Scheepmaker, Remco A. and Lintner, Benjamin and Frankenberg, Christian (2012) Asian monsoon hydrometeorology from TES and SCIAMACHY water vapor isotope measurements and LMDZ simulations: Implications for speleothem climate record interpretation. Journal of Geophysical Research, 117 (D15). Art. No. D15112. ISSN 0148-0227. doi:10.1029/2011JD017133.

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Observations show that heavy oxygen isotope composition in precipitation (δ^(18)O_p) increases from coastal southeastern (SE) China to interior northwestern (NW) China during the wet season, contradicting expectations from simple Rayleigh distillation theory. Here we employ stable isotopes of precipitation and vapor from satellite measurements and climate model simulations to characterize the moisture processes that control Asian monsoon precipitation and relate these processes to speleothem paleoclimate records. We find that δ^(18)O_p is low over SE China as a result of local and upstream condensation and that δ^(18)O_p is high over NW China because of evaporative enrichment of ^(18)O as raindrops fall through dry air. We show that δ^(18)O_p at cave sites over southern China is weakly correlated with upstream precipitation in the core of the Indian monsoon region rather than local precipitation, but it is well-correlated with the δ^(18)O_p over large areas of southern and central China, consistent with coherent speleothem δ^(18)O_p variations over different parts of China. Previous studies have documented high correlations between speleothem δ^(18)O_p and millennial timescale climate forcings, and we suggest that the high correlation between insolation and speleothem δ^(18)O_p in southern China reflects the variations of hydrologic processes over the Indian monsoon region on millennial and orbital timescales. The δ^(18)O_p in the drier part (north of ∼30°N) of China, on the other hand, has consistently negative correlations with local precipitation and may capture local hydrologic processes related to changes in the extent of the Hadley circulation.

Item Type:Article
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Risi, Camille0000-0002-8267-453X
Frankenberg, Christian0000-0002-0546-5857
Additional Information:© 2012 American Geophysical Union. Received 13 November 2011; revised 28 June 2012; accepted 28 June 2012; published 14 August 2012. We thank D. Battisti and R. L. Edwards for helpful discussions, and we also thank three anonymous reviewers and the Editor (S. Ghan) for helpful comments on our manuscript. The work described here was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contracts from the National Aeronautics and Space Administration. The NASA ROSES Aura Science Team NNH07ZDA001N-AST 07-AST07-0069 and NASA ROSES NNH07ZDA001N-NEWS 07-NEWS07-0020 contributed to the support of the analysis. I.F. acknowledges support by National Science Foundation grant EAR-090919, and B.R.L. acknowledges support by National Science Foundation Paleo Perspectives on Climate Change grant AGS-1103209. LMDZ simulations were performed on the NEC-SX6 machine of the IDRIS computing center. R.S. acknowledges support from the Netherlands Space Office as part of the User Support Programme Space Research project GO-AO/16.
Funding AgencyGrant Number
NASANNH07ZDA001N-AST 07-AST07-0069
Netherlands Space OfficeUNSPECIFIED
Subject Keywords:Asian monsoon; amount effect; climate modeling; insolation; speleothem; water isotopes
Issue or Number:D15
Record Number:CaltechAUTHORS:20150511-161524936
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Official Citation:Lee, J.-E., C. Risi, I. Fung, J. Worden, R. A. Scheepmaker, B. Lintner, and C. Frankenberg (2012), Asian monsoon hydrometeorology from TES and SCIAMACHY water vapor isotope measurements and LMDZ simulations: Implications for speleothem climate record interpretation, J. Geophys. Res., 117, D15112, doi:10.1029/2011JD017133.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57425
Deposited By: Jason Perez
Deposited On:13 May 2015 18:18
Last Modified:10 Nov 2021 21:12

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