Fersi W., Bassinot F., Lezine Anne-Marie. (2016). Past productivity variations and organic carbon burial in the Gulf of Aden since the last glacial maximum. Quaternaire, 27 (3), p. 213-226. ISSN 1142-2904.
Titre du document
Past productivity variations and organic carbon burial in the Gulf of Aden since the last glacial maximum
Quaternaire, 2016,
27 (3), p. 213-226 ISSN 1142-2904
We reconstructed the evolution of marine primary productivity across the last deglaciation in the Gulf of Aden based on micro-paleontological and sedimentological data from marine core MD92-1002. Dinoflagellate cysts analysis suggests that the glacial period was characterized by weakened upwellings and well ventilated bottom water. Primary productivity increased from 14.5 ka with a maximum between 12.6 and 10.8 ka, then declined during the Holocene. Maximum of primary productivity in the Gulf of Aden took place about 3 ka earlier than the maximum of upwelling intensity off the Oman margin, and was not phase-locked with the maximum of boreal summer insolation. XRF-derived bromine contents mimic the variations of Total Organic Carbon (TOC) in core MD92-1002. Both records show a strong glacial/interglacial signal that is largely decoupled from our reconstruction of surface productivity, suggesting that total organic content in core MD92-1002 is mainly controlled by preservation at the sea floor.
Plan de classement
Sciences du milieu [021]
;
Ecologie, systèmes aquatiques [036]
;
Géologie et formations superficielles [064]
Description Géographique
ADEN GOLFE ; OMAN
Localisation
Fonds IRD
Identifiant IRD
PAR00015364
Contact
Coordonnées :
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