%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Fersi, W.
%A Bassinot, F.
%A Lezine, Anne-Marie
%T Past productivity variations and organic carbon burial in the Gulf of Aden since the last glacial maximum
%D 2016
%L PAR00015364
%G ENG
%J Quaternaire
%@ 1142-2904
%K Gulf of Aden ; dinoflagellate cysts ; productivity ; organic carbon ; monsoon
%K ADEN GOLFE ; OMAN
%M ISI:000388370700003
%N 3
%P 213-226
%U https://www.documentation.ird.fr/hor/PAR00015364
%V 27
%W Horizon (IRD)
%X 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.
%$ 064 ; 021 ; 036