Ms
Dharma Andrea Reyes-Macaya
(MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany. )
In tropical and subtropical oceans, models and empirical observations indicate an expansion of the "hypoxic oceanic areas", namely Oxygen Minimum Zones (OMZ) and Anoxic Zones (AZ), under nowadays global warming conditions. Since the OMZs are located in eastern boundary upwelling areas, the Eastern Tropical and South East Pacific offer a natural laboratory to study the evolution of a OMZ and AZ. In order to reconstruct the past geometry of their respective OMZ and AZ, we aim to characterize the community structure and stable isotope composition (δ18O and δ13C) of benthic foraminifera (both Rose Bengal stained and non-stained) to generate new calibrations of geochemical (δ18O, δ13C) and biological proxies (transfer functions) to infer past environmental conditions (e.g. water density, nutrient and oxygen content) in the region. The data are complemented with measurements of seawater δ18O and δ13C.
We analysed the uppermost centimetre of multicores, gravity and piston cores (n=84) collected from the steep Peru-Chile continental margin during several expeditions along a N-S transect between 12°-42°S, spanning longitudes of 71°-80°W and water depths of 24-4000 m. The sediments are bathed by the main water masses in the region, Subantarctic Surface Water, Equatorial Subsurface Water, Antarctic Intermediate Water, Equatorial Subsurface Water, Pacific Deep Water and Circumpolar Deep Water; and are ideal for testing the suitability of Chilean and Peruvian margin core tops for bottom water oxygen reconstructions. Ages of samples are assessed using radiocarbon dating and benthic foraminiferal oxygen isotopes, only truly modern samples are considered in the calibrations.
| Email Address |
dreyesmacaya@marum.de
|
| Affiliation |
MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany.
|
| Are you a SFB 754 / Future Ocean member? |
No
|
| Position |
PhD Candidate
|
Ms
Dharma Andrea Reyes-Macaya
(MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany. )
Dr
Babette Hoogakker
(The Lyell Centre, Heriot-Watt University)
Dr
Gema Martínez-Méndez
(Center for Marine Environmental Sciences (MARUM), University of Bremen, Germany)
Dr
Mahyar Mohtadi
(MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany. )
Dr
Jorge Cardich Salazar
(Universidad Peruana Cayetano Heredia)
Prof.
Gerhard Schmiedl
(Center for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Hamburg, Germany. )
Dr
Zeynep Erdem
(NIOZ Royal Netherlands Institute for Sea Research and Utrecht University)
Dr
Daniel McCorkle
(Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA.)
Dr
Yusuke Yokoyama
(Research School of Earth Sciences, The Australian National University)
Prof.
Melanie Leng
(British Geological Survey)
Dr
Andreas Lückge
(Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Germany.)
Dr
Raúl Tapia
(Center for Advanced Studies, University of Playa Ancha, Viña del Mar, Chile. )
Ms
Macarena Vergara
(Department of Zoology, University of Concepcion, Concepcion, Chile.)
Dr
Margarita Ester Marchant San Martín
(Department of Zoology, University of Concepcion, Concepcion, Chile.)
Ms
Consuelo Martínez-Fontaine
(Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Laboratoire mixte CNRS-CEA, Avenue de la Terrasse, Gif-sur-Yvette Cedex, France.)
Prof.
Elisabeth Michel
(Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Laboratoire mixte CNRS-CEA, Avenue de la Terrasse, Gif-sur-Yvette Cedex, France.)
Prof.
Giuseppe Siani
(Laboratoire des Interactions et Dynamique des Environnements de Surface (IDES), CNRS-Université de Paris-Sud, Orsay Cedex, France. )
Prof.
Alan Mix
(College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, USA.)
Dr
Ricardo De Pol-Holz
(Center for Climate and Resilience Research, Santiago, Chile.)
Prof.
James Ingle
(School of Earth, Energy and Environmental Sciences, Stanford University, Stanford, USA.)
Prof.
Dimitri Gutierrez
(Instituto del Mar del Perú (IMARPE), Esquina Gamarra y General Valle s/n, Callao, Perú)
Prof.
Dierk Hebbeln
(Center for Marine Environmental Sciences (MARUM), University of Bremen, Germany)
There are no materials yet.
