Abstract：
:Reconstructed annual streamflows using tree-ring chronologies provide useful information on moisture availability during the pre-historic period, but they have limitations in estimating high flows due to the upper bound on soil water holding capacity and trees' metabolic growth limits. We propose a hybrid approach that uses tree-ring chronologies and climatic indices for improving high flows in 301 basins whose annual streamflows are modulated by ENSO and/or PDO. The hybrid decomposition approach relies on separating the moisture supply into the basin as outside-the-region moisture and within-the-region moisture with the former being estimated by SST indices and the latter being estimated by tree-ring chronologies. Analyses over the 301 stations from coterminous US show that the proposed approach improves the high flows and improves the overall error in the reconstructed streamflows. Potential utility of the improved reconstructed annual streamflows with improved high flows is also discussed.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Mukhopadhyay S,Patskoski JM,Sankarasubramanian Adoi
10.1038/s41598-018-23294-6subject
Has Abstractpub_date
2018-03-21 00:00:00pages
4946issue
1issn
2045-2322pii
10.1038/s41598-018-23294-6journal_volume
8pub_type
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