• Measurements of Δ14C, δ13C and δ15N are reported for dissolved, suspended and sinking particulate, and total sedimentary organic matter in the Santa Monica Basin on CaBS cruises 1, 3, 4, 7, 8 and 10. These isotopic signatures were indicative of the following processes occurring within the basin regime: terrestrial inputs of organic matter to the sinking and suspended particulate organic matter were of the order of 10% or less, and as high as 25% for the sedimentary organic matter; Δ14C values of…Read more