Articles | Volume 14, issue 5
Clim. Past, 14, 653–664, 2018
https://doi.org/10.5194/cp-14-653-2018

Special issue: Climate of the past 2000 years: regional and trans-regional...

Clim. Past, 14, 653–664, 2018
https://doi.org/10.5194/cp-14-653-2018

Research article 24 May 2018

Research article | 24 May 2018

Decreasing Indian summer monsoon on the northern Indian sub-continent during the last 180 years: evidence from five tree-ring cellulose oxygen isotope chronologies

Chenxi Xu et al.

Data sets

Tree-ring oxygen isotope chronology in western Nepal M. Sano, R. Ramesh, M. Sheshshayee, and R. Sukumar https://www.ncdc.noaa.gov/paleo/study/22547

Tree-ring oxygen isotope chronology in Bhutan M. Sano, P. Tshering, J. Komori, K. Fujita, C. Xu, and T. Nakatsuka https://www.ncdc.noaa.gov/paleo/study/22548

Tree-ring oxygen isotope chronology in Northwest India M. Sano, A. Dimri, R., Ramesh, C. Xu, Z. Li, and T. Nakatsuka https://www.ncdc.noaa.gov/paleo/study/22549

Tree-ring oxygen isotope chronology in northern India C. Xu, M. Sano, A. P. Dimri, R. Ramesh, T. Nakatsuka, F. Shi, and Z. Guo https://www.ncdc.noaa.gov/paleo/study/22550

Tree-ring oxygen isotope chronology in central Nepal C. Xu, M. Sano, A. P. Dimri, R. Ramesh, T. Nakatsuka, F. Shi, and Z. Guo https://www.ncdc.noaa.gov/paleo/study/22551

Regional tree-ring oxygen isotope chronology from the Himalaya C. Xu, M. Sano, A. P. Dimri, R. Ramesh, T. Nakatsuka, F. Shi, and Z. Guo https://www.ncdc.noaa.gov/paleo/study/23830

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Short summary
We have constructed a regional tree ring cellulose oxygen isotope record using a total of five chronologies obtained from the Himalaya. Centennial changes in the regional tree ring record indicate a trend of weakened Indian summer monsoon (ISM) intensity since 1820. Decreasing ISM activity is also observed in various high-resolution ISM records from southwest China and Southeast Asia, and may be the result of reduced land–ocean thermal contrasts since 1820.