Abstract
Abstract Terrestrial source areas are linked to deep‐sea basins by sediment‐routing systems, which only recently have been studied with a holistic approach focused on terrestrial and submarine components and their interactions. Here we compare an extensive piston‐core and radiocarbon‐age data set from offshore southern California to contemporaneous Holocene climate proxies in order to test the hypothesis that climatic signals are rapidly propagated from source to sink in a spatially restricted sediment‐routing system that includes the Santa Ana River drainage basin and the Newport deep‐sea depositional system. Sediment cores demonstrate that variability in rates of Holocene deep‐sea turbidite deposition is related to complex ocean‐atmosphere interactions, including enhanced magnitude and frequency of the North American monsoon and El Nino–Southern Oscillation cycles, which increased precipitation and fluvial discharge in southern California. This relationship is evident because, unlike many sediment‐routi...
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