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Reconstructed streamflow for Citarum River, Java, Indonesia: linkages to tropical climate dynamics

D'Arrigo, Rosanne; Abram, Nerilie; Ummenhofer, Caroline; Palmer, Jonathan; Mudelsee, Manfred. 2011 Reconstructed streamflow for Citarum River, Java, Indonesia: linkages to tropical climate dynamics. Climate Dynamics, 36 (3-4). 451-462. 10.1007/s00382-009-0717-2

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Abstract/Summary

The Citarum river basin of western Java, Indonesia, which supplies water to 10 million residents in Jakarta, has become increasingly vulnerable to anthropogenic change. Citarum's streamflow record, only similar to 45 years in length (1963-present), is too short for understanding the full range of hydrometeorological variability in this important region. Here we present a tree-ring based reconstruction of September-November Citarum streamflow (AD 1759-2006), one of the first such records available for monsoon Asia. Close coupling is observed between decreased tree growth and low streamflow levels, which in turn are associated with drought caused by ENSO warm events in the tropical Pacific and Indian Ocean positive dipole-type variability. Over the full length of record, reconstructed variance was at its weakest during the interval from similar to 1905-1960, overlapping with a period of unusually-low variability (1920-1960) in the ENSO-Indian Ocean dipole systems. In subsequent decades, increased variance in both the streamflow anomalies and a coral-based SST reconstruction of the Indian Ocean Dipole Mode signal the potential for intensified drought activity and related consequences for water supply and crop productivity in western Java, where much of the country's rice is grown.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s00382-009-0717-2
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Chemistry and Past Climate
ISSN: 0930-7575
Additional Keywords: Streamflow; Java; Tree rings; ENSO; Dipole; Drought
NORA Subject Terms: Meteorology and Climatology
Hydrology
Earth Sciences
Date made live: 26 May 2011 11:12
URI: http://nora.nerc.ac.uk/id/eprint/14066

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