A5015460968- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Geochemistry and Elemental Analysis
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Paleontology and Stratigraphy of Fossils
- Methane Hydrates and Related Phenomena
- Geomagnetism and Paleomagnetism Studies
- Oceanographic and Atmospheric Processes
- Silicon Effects in Agriculture
- Marine and environmental studies
- Geochemistry and Geologic Mapping
- Mercury impact and mitigation studies
- Graphite, nuclear technology, radiation studies
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Groundwater and Isotope Geochemistry
- Atmospheric and Environmental Gas Dynamics
- Fish biology, ecology, and behavior
- earthquake and tectonic studies
- Ocean Acidification Effects and Responses
- Radioactive element chemistry and processing
- Solid-state spectroscopy and crystallography
- Radioactive contamination and transfer
- Fish Ecology and Management Studies
ETH Zurich
2015-2024
Vrije Universiteit Brussel
2022
Laboratoire des Sciences de l'Environnement Marin
2022
Institut Universitaire Européen de la Mer
2022
Institute of Geochemistry
2016
Princeton University
2012-2015
The GEOTRACES Intermediate Data Product 2014 (IDP2014) is the first publicly available data product of international programme, and contains measured quality controlled before end 2013. It consists two parts: (1) a compilation digital for more than 200 trace elements isotopes (TEIs) as well classical hydrographic parameters, (2) eGEOTRACES Electronic Atlas providing strongly inter-linked on-line atlas including 300 section plots 90 animated 3D scenes. IDP2014 covers Atlantic, Arctic, Indian...
Abstract This study examines the role of processes transporting tracers across Polar Front (PF) in depth interval between surface and major topographic sills, which this refers to as “PF core.” A preindustrial control simulation an eddying climate model coupled a biogeochemical [GFDL Climate Model, version 2.6 (CM2.6)– simplified Biogeochemistry with Light Iron Nutrients Gas (miniBLING) 0.1° ocean model] is used investigate transport heat, carbon, oxygen, phosphate PF core, particular focus...
The fractionation of silicon (Si) stable isotopes by biological activity in the surface ocean makes isotope composition ( δ 30 Si) dissolved seawater a sensitive tracer oceanic biogeochemical Si cycle. We present high‐precision dataset that characterizes distribution deep Atlantic Ocean from Denmark Strait to Drake Passage, documenting strong meridional and smaller, but resolvable, vertical gradients. show these gradients are related two sources bottom waters Ocean: North Nordic origin carry...
Abstract Earth System Models increasingly include ocean biogeochemistry models in order to predict changes carbon storage, hypoxia, and biological productivity under climate change. However, state‐of‐the‐art biogeochemical many advected tracers, that significantly increase the computational resources required, forcing a trade‐off with spatial resolution. Here, we compare state‐of‐the art model 30 prognostic tracers (TOPAZ) two reduced‐tracer models, one 6 (BLING), other 3 (miniBLING). The...
Iron (Fe) is an essential micronutrient that limits primary productivity throughout the surface of Southern Ocean. Here, we present first high-resolution depth profiles for dissolved Fe and isotope ratios (δ56Fe) from all major zones Ocean, collected during Antarctic Circumnavigation Expedition in austral summer 2017. Open-ocean waters are characterized by remarkably high δ56Fe values (up to +1.6‰) very low concentrations (<0.05 nmol kg−1). We attribute elevated above ferricline effect...
The role of nickel (Ni) in ocean biogeochemical cycles is both under-studied and controversial. Strong correlations between Ni organic carbon modern ancient marine sediments suggest a prominent over substantial portion Earth history. Addition to culturing seawater incubation experiments produces strong responses terms cell growth, particularly nitrogen-fixing organisms. But the implied limiting for phytoplankton growth inconsistent with observations real ocean, specifically that photic zone...
The Southern Ocean is the largest high-nutrient low-chlorophyll environment in global ocean, and represents an important source of intermediate deep waters to lower latitudes. Constraining trace metal biogeochemical cycling therefore not just for understanding biological productivity carbon regionally, but also distributions throughout latitude oceans. We present dissolved Fe, Ni, Cu, Zn, Cd, Pb macronutrient concentrations Indian Pacific sectors from Antarctic Circumnavigation Expedition...
The first inter-calibration study of the stable silicon isotope composition dissolved silicic acid in seawater,<italic>δ</italic><sup>30</sup>Si(OH)<sub>4</sub>, is presented as a contribution to international GEOTRACES program.
Abstract Globally averaged riverine silicon (Si) concentrations and isotope composition (δ 30 Si) may be affected by the expansion retreat of large ice sheets during glacial−interglacial cycles. Here we provide evidence this based on δ Si meltwater runoff from a Greenland Ice Sheet catchment. Glacier has lightest measured in running waters (−0.25 ± 0.12‰), significantly lower than nonglacial rivers (1.25 0.68‰), such that overall decline glacial since Last Glacial Maximum (LGM) explain...
It has been inferred that the marine distributions of micronutrient cadmium (Cd) and its stable isotope composition (expressed as δ114Cd) bear widespread unambiguous evidence for loss Cd from shallow water column through formation particle-associated sulphide (CdS) in oxygen minimum zones (OMZs). In this review, we bring together elemental isotopic datasets dissolved particulate pools order to unravel multiple, overlapping controls on distribution δ114Cd, demonstrate global dataset...
The sustenance of marine primary productivity depends on the supply macro- and micronutrients to photosynthesizers in ocean’s sunlit surface. Without from deep, sinking particles would deplete upper ocean these vital elements within decades. Over last 20 years, it has been recognized that Southern Ocean, where nutrient-rich deep waters are brought surface water masses fill much formed, plays a pivotal role replenishing upper-ocean nutrients. Photosynthesizers grow take up nutrients Ocean...