# name
Deglacial and Holocene changes in Mediterranean Thermohaline Circulation: A joint perspective from Eastern and Western basins [INQUA 2023]

# metadata.dc.description.abstract[].value
The dominant arid climate conditions over the Mediterranean (Med) control water
properties and the formation processes of intermediate and deep water masses. Deep
convection cells occur in both the E- and W-Med basins and there are interconnected
through the intermediate waters mostly formed in the easternmost area of the Med. During
last deglaciation and Holocene periods both E- and W-Med had experienced periods of
major disruptions in deep convection. The last organic layer (ORL1) formed in the WMed
during the deglacial period and later the last sapropel (S1) in the E-Med. Both
enhanced productivity and enhanced stratification are regarded as the causes for the two
events but responding to different drivers, the deglacial freshening in the case of the
ORL1 and the African monsoon flooding for the S1.

# metadata.dc.description.abstract[].value
Here we present U/Mn ratios measured in the foraminifera diagenetic coatings from
sediment cores from both E- and W-Med. The nature of this proxy, sensitive to oxygen
water content, allows its application in a wide range of oceanographical/oxygen
conditions, a situation that compromises other proxies whose carrier is limited by the
changes in oxygen content. This approach allows us, by the first time, to compare the
oxygen evolution of individual basins and at different water depths by means of the same
tool. The obtained results indicate the deglacial development of an intense minimum
oxygen zone in the W-Med associated to the LIW which extended down to at least 950m
in association with the ORL1 formation, highlighting that the E-Med could also had had
an important role in the development of this ORL1. During the Younger Dryas a reventilation
process of the W-Med interior started at around 900m and evolved upwards
and downwards to fully develop at shallower and deepest depths (300 and 1840 m
respectively) at the onset of the S1 in the E-Med. Changes in the thermohaline system of
the E and W-Med were closely related but with opposite sign in their response during
critical events such as the S1.

# metadata.dc.relation.ispartof[].value
Presentació a: XXII INQUA Congress 2023, Roma (14-20 July). Session 133: Unravelling Mediterranean sensitivity to past rapid climate variability. Abstract ID. 5278 Oral presentation

# metadata.dc.source[].value
Comunicacions a congressos (Dinàmica de la Terra i de l'Oceà)

# metadata.dc.title[].value
Deglacial and Holocene changes in Mediterranean Thermohaline Circulation: A joint perspective from Eastern and Western basins [INQUA 2023]