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Tibetan Plateau summer precipitation: covariability with circulation indices

MPG-Autoren
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Bothe,  O.
Max Planck Fellows, MPI for Meteorology, Max Planck Society;

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Fraedrich,  K.
Max Planck Fellows, MPI for Meteorology, Max Planck Society;

Zhu,  X.
Max Planck Fellows, MPI for Meteorology, Max Planck Society;
I 2 - Integrated Modeling Activities, Integrated Activities, The CliSAP Cluster of Excellence, External Organizations;

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Zitation

Bothe, O., Fraedrich, K., & Zhu, X. (2012). Tibetan Plateau summer precipitation: covariability with circulation indices. Theoretical and Applied Climatology, 108, 293-300. doi:10.1007/s00704-011-0538-1.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0012-2D1B-D
Zusammenfassung
Relations between Tibetan Plateau precipitation and large-scale climate indices are studied based on the Standardized Precipitation Index (SPI) and the boreal summer season. The focus is on the decadal variability of links between the large-scale circulation and the plateau drought and wetness. Analysis of teleconnectivity of the continental northern hemisphere standardized summer precipitation reveals the Tibetan Plateau as a major SPI teleconnectivity center in south-eastern Asia connecting remote correlation patterns over Eurasia. Employing a moving window approach, changes in covariability and synchronizations between Tibetan Plateau summer SPI and climate indices are analyzed on decadal time scales. Decadal variability in the relationships between Tibetan Plateau summer SPI and the large-scale climate system is characterized by three shifts related to changes in the North Atlantic, the Indian Ocean, and the tropical Pacific. Changes in the North Atlantic variability (North Atlantic Oscillation) result in a stable level of Tibetan Plateau summer SPI variability; the response to changes in tropical Pacific variability is prominent in various indices such as Asian monsoon, Pacific / North America, and East Atlantic/ Western Russia pattern.