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Change and teleconnections of climate on the Tibetan Plateau

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Abstract

Exploring the change and teleconnection of climate on the Tibetan Plateau is of utmost importance to understand global climate change. However, it remains further work because of two aspects: (1) The sparse and short observation provides limited information of climate change. (2) The teleconnection analysis mostly ignores the combined effects of multiple atmospheric circulation indices. This study used a climate dataset with grid size of 0.5′ for the period of 1901–2017 to analyze the spatiotemporal characteristics of precipitation and temperature on the Tibetan Plateau. Further, we employed the multivariate wavelet coherence to investigate the combined effects of multiple circulation indices (Atlantic Multidecadal Oscillation—AMO, El Nino-Southern Oscillation—ENSO, Indian Ocean Dipole Index—IOD, North Atlantic Oscillation—NAO, and North Pacific Oscillation—NPO) on climate at varying scales over time. The long-term averages of precipitation and temperature varied spatially because of the terrain effects. The climate for 1901–2017 was overall getting wetter and warmer, but the interannual variability split the whole study period into three sub-periods: drier and warmer for 1901–1940, wetter and colder for 1941–1966, and wetter and warmer for 1966–2017. For a single atmospheric circulation index, ENSO or NPO had the greatest impacts on the climate change at the scale of 8–16 months over the whole study period. Further, multiple atmospheric circulation index can combine to have simultaneous effects (e.g., NAO–NPO) on climate change. The interannual variability of climate can be attributed to that of a single or combined atmospheric circulation indices. These results provide fundamental information for studies of climate change on the Tibetan Plateau and the globe, and the multivariate wavelet analysis is promising in interpreting the impacts of atmospheric circulation on climate change.

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Acknowledgements

This study was jointly funded by the National Natural Science Foundation of China (91637209 and U1703124).

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ZL designed and funded this study, and edited the manuscript. YS conducted data analysis and wrote the manuscript. WY and FJ conducted the wavelet coherence analysis and edited the manuscript.

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Correspondence to Zhi Li.

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The authors declare no competing interests.

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Si, Y., Jin, F., Yang, W. et al. Change and teleconnections of climate on the Tibetan Plateau. Stoch Environ Res Risk Assess 37, 4013–4027 (2023). https://doi.org/10.1007/s00477-023-02492-3

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  • DOI: https://doi.org/10.1007/s00477-023-02492-3

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