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Browsing by Author "Krug, Marjolaine J"

Now showing items 1-17 of 17

Air-sea fluxes with a focus on heat and momentum

Author: Cronin, MF ; Gentemann, CL ; Edson, J ; Ueki, I ; Bourassa, M ; Brown, S ; Clayson, CA ; Fairall, CW ; Farrar, JT ; Krug, Marjolaine J Date: Jul 2019 Turbulent and radiative exchanges of heat between the ocean and atmosphere (hereafter heat fluxes), ocean surface wind stress, and state variables used to estimate them, are Essential Ocean Variables (EOVs) and Essential Climate Variables ... Read more
Coastal upwelling south of Madagascar: Temporal and spatial variability

Author: Ramanantsoa, JD ; Krug, Marjolaine J ; Penven, P ; Rouault, M ; Gula, J Date: Feb 2018 Madagascar's southern coastal marine zone is a region of high biological productivity which supports a wide range of marine ecosystems, including fisheries. This high biological productivity is attributed to coastal upwelling. This paper ... Read more
Evolving the physical global ocean observing system for research and application services through international coordination

Author: Sloyan, BM ; Wilkin, J ; Hill, KL ; Chidichimo, MP ; Cronin, MF ; Johannessen, JK ; Krug, Marjolaine J ; Lee, T ; Oka, E ; Karstensen, J Date: Aug 2019 Climate change and variability are major societal challenges, and the ocean is an integral part of this complex and variable system. Key to the understanding of the ocean’s role in the Earth’s climate system is the study of ocean and sea-ice ... Read more
Generation of submesoscale frontal eddies in the Agulhas current

Author: Tedesco, P ; Cula, J ; Ménesguen, C ; Penven, P ; Krug, Marjolaine J Date: Nov 2019 This study addresses the dynamics of the Agulhas inshore front in the submesoscale range upstream of 26 E. Submesoscale frontal eddies are observed in the vicinity of Port Elizabeth (26 E) from satellite images and in observations collected ... Read more
Interactions between the Agulhas Current and the eastern margin of the Agulhas Bank

Author: Krug, Marjolaine J ; Tournadre, J ; Dufois, F Date: Jun 2014 Interactions between the Agulhas Current and the ecologically important region of the Agulhas Bank are studied through the analysis of high resolution along-track altimetry, merged mapped altimetry and in situ measurements of current speed ... Read more
Mapping the ocean current strength and persistence in the Agulhas to inform marine energy development

Author: Meyer, I ; Braby, L ; Krug, Marjolaine J ; Backeberg, Bjorn-Christoph Date: Apr 2017 The potential for energy extraction from the fast-flowing Agulhas Current along South Africa’s East Coast is examined. Potentially suitable regions are evaluated using state-of-the-art satellite remote-sensing, predictive modelling, and in ... Read more
Mapping the ocean current strength and persistence in the Agulhas to inform marine energy development

Author: Meyer, I ; Braby, L ; Krug, Marjolaine J ; Backeberg, Bjorn-Christoph Date: Apr 2017 The potential for energy extraction from the fast-flowing Agulhas Current along South Africa’s East Coast is examined. Potentially suitable regions are evaluated using state-of-the-art satellite remote-sensing, predictive modelling, and in ... Read more
Observations of the vertical and temporal evolution of a Natal Pulse along the Eastern Agulhas Bank

Author: Pivan, X ; Krug, Marjolaine J ; Herbette, S Date: Sep 2016 This study reinvestigates the work of Lutjeharms et al. (2001, 2003) who documented the properties of a Natal Pulse using isopycnal Lagrangian floats. We combined Lagrangian analyses and Eulerian maps derived from objective analysis to better ... Read more
Observed eddy dissipation in the Agulhas Current

Author: Braby, L ; Backeberg, Björn C ; Ansorge, I ; Roberts, MJ ; Krug, Marjolaine J ; Reason, CJC Date: Aug 2016 Analyzing eddy characteristics from a global data set of automatically tracked eddies for the Agulhas Current in combination with surface drifters as well as geostrophic currents from satellite altimeters, it is shown that eddies from the ... Read more c b
Observing the Agulhas Current with sea surface temperature and altimetry data: challenges and perspectives

Author: Krug, Marjolaine J ; Cipollini, P ; Dufois, F Date: Jun 2014 The Agulhas Current is a challenging region for satellite remote sensing observations. Strong evaporation rates above the current core and the Retroflection reduce the number of cloud-free observations from Infra-Red sensors, while microwave ... Read more
Ocean gliders ride the research wave in the Agulhas Current

Author: Krug, Marjolaine J ; Swart, S ; Hermes, J Date: Jun 2018 Off the east coast of South Africa, robotic ocean gliders deployed in the Agulhas Current capture new data that help us better understand how energy dissipates in the ocean. Read more
OceanGliders: A component of the integrated GOOS

Author: Testor, P ; De Young, B ; Rudnick, DL ; Glenn, S ; Hayes, D ; Lee, CM ; Pattiaratchi, C ; Krug, Marjolaine J ; Nicholson, Sarah-Anne ; Hill, K Date: Oct 2019 The OceanGliders program started in 2016 to support active coordination and enhancement of global glider activity. OceanGliders contributes to the international efforts of the Global Ocean Observation System (GOOS) for Climate, Ocean Health, ... Read more
Satellite observations of an annual cycle in the Agulhas Current

Author: Krug, Marjolaine J ; Tournadre, J Date: Aug 2012 Ocean models show an annual cycle in the Agulhas Current transport which has not yet been confirmed in analyses of in-situ or satellite observations. A cross-stream coordinate approach is used to study the variability of the Agulhas Current ... Read more
Signature of the Agulhas Current in high resolution satellite derived wind fields

Author: Krug, Marjolaine J ; Schilperoort, D ; Collard, F ; Hansen, MW ; Rouault, M Date: Nov 2018 5 years of Systematic Envisat Advanced Synthetic Aperture Radar (ASAR) acquisitions and 8 years of observations from the Jason 2 altimeter are used to investigate the signature of the Agulhas Current on high resolution (between 1 and 5 km) ... Read more
Submesoscale cyclones in the Agulhas Current

Author: Krug, Marjolaine J ; Swart, S ; Gula, J Date: Jan 2017 Gliders were deployed for the very first time in the Agulhas Current region to investigate processes of interactions between western boundary currents and shelf waters. Continuous observations from the gliders in water depths of 100-1000 m ... Read more
A synthesis of three decades of socio-ecological change in False Bay, South Africa: setting the scene for multidisciplinary research and management

Author: Pfaff, MC ; Logston, RC ; Raemaekers, S.J.P.N. ; Hermes, JC ; Blamey, LK ; Cawthra, HC ; Colenbrander, DR ; Crawford, RJM ; Krug, Marjolaine J ; Van Niekerk, Lara Date: Aug 2019 Over the past three decades, marine resource management has shifted conceptually from top-down sectoral approaches towards the more systems-oriented multi-stakeholder frameworks of integrated coastal management and ecosystem-based conservation. ... Read more
Uncovering a new current: The Southwest MAdagascar coastal current

Author: Ramanantsoa, JD ; Penven, P ; Krug, Marjolaine J ; Gula, J ; Rouault, M Date: Feb 2018 Cruise data sets, satellite remote sensing observations, and model data analyses are combined to highlight the existence of a coastal surface poleward flow in the southwest of Madagascar: the Southwest MAdagascar Coastal Current (SMACC). The ... Read more

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