Coherent streamflow variability in Monsoon Asia over the past eight centuries---links to oceanic drivers

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Hung Tan Thai Nguyen, Sean W.D. Turner, Brendan Martin Buckley, Stefano Galelli


The Monsoon Asia region is home to ten of the world’s biggest rivers, supporting the lives of 1.7 billion people who rely on streamflow for water, energy, and food. Yet, a synoptic understanding of multi-centennial streamflow variability for this region is lacking. Here we produce the first large scale streamflow reconstruction over Monsoon Asia (63 stations in 16 countries), using a novel climate-informed dynamic algorithm that is skillful over 92% of the gauging stations. We show that streamflow in Monsoon Asia is spatially coherent, owing to common drivers from the Pacific, Indian, and Atlantic Oceans that exert their greatest influence over the Mekong and Chao Phraya basins. This work increases our understanding of streamflow variability over Monsoon Asia. We suggest that future water management in the region should be coordinated between basins, taking into account the states of the oceans.



Climate, Earth Sciences, Hydrology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics


ENSO, Chao Phraya, Mekong, Monsoon Asia, Pacific Decadal Variability, streamflow reconstruction


Published: 2019-11-13 14:34

Last Updated: 2019-11-21 21:03

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