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Publications
669 publication(s) trouvée(s)
Article scientifique
Ranking South African provinces on the basis of MERRA 2D surface incident shortwave flux
The main objective of the present study is to rank South African provinces on the basis of incoming solar radiation. …
Article scientifique
First in-flight synchrotron X-ray absorption and photoemission study of carbon soot nanoparticles
Many studies have been conducted on the environmental impacts of combustion generated aerosols. Due to their complex composition and morphology, …
Article scientifique
What drives the spatial variability of primary productivity and matter fluxes in the north-west African upwelling system? A modelling approach
Abstract. A comparative box analysis based on a multi-decadal physical–biogeochemical hindcast simulation (1980–2009) was conducted to characterize the drivers of …
Article scientifique
Environmental drivers of coccolithophore abundance and calcification across Drake Passage (Southern Ocean)
Abstract. Although coccolithophores are not as numerically common or as diverse in the Southern Ocean as they are in subpolar …
Article scientifique
U–Pb geochronology documents out-of-sequence emplacement of ultramafic layers in the Bushveld Igneous Complex of South Africa
Layered intrusions represent part of the plumbing systems that deliver vast quantities of magma through the Earth's crust during the …
Article scientifique
In situ Measurements and Model Estimates of NO3 and NH4 Uptake by Different Phytoplankton Size Fractions in the Southern Benguela Upwelling System
Bulk measurements can be made of phytoplankton standing stocks on a quasi-synoptic scale but it is more difficult to measure …
Article scientifique
Seismicity and neotectonic uplift in the Augrabies Falls National Park, Namaqualand, Northern Cape, South Africa
Gneissic rocks in the Augrabies Falls National Park are part of the Proterozoic Namaqua-Natal mobile belt. Finding neotectonic evidence in …
Article scientifique
Evaluation of reservoir compartmentalization and property trends using static modelling and sequence stratigraphy
In the context of harder-to-find reserves and rise in development costs, it is vital that reservoir heterogeneities and compartmentalization be …
Article scientifique
Oxygen utilization and downward carbon flux in an oxygen-depleted eddy in the eastern tropical North Atlantic
Abstract. The occurrence of mesoscale eddies that develop suboxic environments at shallow depth (about 40–100 m) has recently been reported …
Article scientifique
The initiation of segmented buoyancy-driven melting during continental breakup
Melting of the mantle during continental breakup leads to magmatic intrusion and volcanism, yet our understanding of the location and …
Article scientifique
A Complete Fossil-Calibrated Phylogeny of Seed Plant Families as a Tool for Comparative Analyses: Testing the ‘Time for Speciation’ Hypothesis
Explaining the uneven distribution of species richness across the branches of the tree of life has been a major challenge …
Article scientifique
Estimating ionospheric currents by inversion from ground-based geomagnetic data and calculating geoelectric fields for studies of geomagnetically induced currents
This research focuses on the inversion of geomagnetic variation field measurements to obtain the source currents in the ionosphere and …
Article scientifique
Mid-crustal shear zone development under retrograde conditions: pressure–temperature–fluid constraints from the Kuckaus Mylonite Zone, Namibia
Abstract. The Kuckaus Mylonite Zone (KMZ) forms part of the larger Marshall Rocks–Pofadder shear zone system, a 550 km-long, crustal-scale …
Article scientifique
Impacts of a decadal drainage disturbance on surface–atmosphere fluxes of carbon dioxide in a permafrost ecosystem
Abstract. Hydrologic conditions are a major controlling factor for carbon exchange processes in high-latitude ecosystems. The presence or absence of …
Article scientifique
Suffocating Phytoplankton, Suffocating Waters—Red Tides and Anoxia
The dynamics of O2 depletion in exceptional dinoflagellate blooms, often referred to as red tides or harmful algal blooms (HABs), …
Article scientifique
Analytical and numerical study of the salinity intrusion in the Sebou river estuary (Morocco) – effect of the “Super Blood Moon” (total lunar eclipse) of 2015
Abstract. The longitudinal variation of salinity and the maximum salinity intrusion length in an alluvial estuary are important environmental concerns …
Article scientifique
Low-oxygen waters limited habitable space for early animals
The oceans at the start of the Neoproterozoic Era (1,000-541 million years ago, Ma) were dominantly anoxic, but may have …
Article scientifique
Environmental Impacts of the Deep-Water Oil and Gas Industry: A Review to Guide Management Strategies
The industrialization of the deep sea is expanding worldwide. Increasing oil and gas exploration activities in the absence of sufficient …
Article scientifique
A multi-decade record of high-quality f CO 2 data in version 3 of the Surface Ocean CO 2 Atlas (SOCAT)
Abstract. The Surface Ocean CO2 Atlas (SOCAT) is a synthesis of quality-controlled fCO2 (fugacity of carbon dioxide) values for the …
Thèse
Périurbanisation et accessibilité aux services de santé dans la périphérie Nord de Yaoundé, Cameroun
La ville de Yaoundé connaît une périurbanisation qui transforme profondément l’organisation spatiale de la ville, avec l’émergence de nouveaux quartiers …