title: Reconstruction of productivity signal and deep-water conditions in Moroccan Atlantic margin (~35°N) from the last glacial to the Holocene.
abstract: In order to assess the changes in sea-surface hydrology and productivity signal from the last glacial to the Holocene; a set of isotopic, geochemical and microgranulometric proxies was used for this study. Former studies revealed that the reconstruction of paleoproductivity from ocean sediment gives different results depending the measurement used. The comparison between our productivity proxies (total organic carbon, carbonate and planktonic δ(13)C) as well as previous results in nearby location indicates that the planktonic δ(13)C responds better to marine productivity changes and represents therefore a suitable proxy for paleoproductivity reconstruction in our studied area. The productivity signal reveals two main enrichments during the Young Dryas (YD) and the Heinrich Event 1 (HE 1) and correlates perfectly with upwelling activity mentioned by an increasing trend of aeolian proxies. In addition, our results show that biogenic components in the sediment have a marine origin and the proportion of organic matter preserved depends on the total sediment accumulation rate.
authors: Faculty of Sciences, Mohammed V University, Agdal Rabat, Morocco.
authors: Yassine
authors: Y
authors: El Frihmat
authors: Center for Marine Environmental Sciences (MARUM), University of Bremen, Leobener Str., 28359 Bremen, Germany.
authors: Dierk
authors: D
authors: Hebbeln
authors: Faculty of Sciences, Mohammed V University, Agdal Rabat, Morocco.
authors: El Bachir
authors: el B
authors: Jaaidi
authors: Scientific Institute, Mohammed V University, Agdal, Rabat, Morocco.
authors: Nadia
authors: N
authors: Mhammdi
keywords: Carbonate; Larache margin; Late quaternary; Paleoproductivity; Planktonic δ13C; Total organic carbon