Role of Pacific SSTs in improving reconstructed streamflow over the coterminous US.

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 a

SUBMITTER: Mukhopadhyay S 

PROVIDER: S-EPMC5862983 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature