Marcel Du Plessis

Marcel Du Plessis
University of Gothenburg | GU · Department of Marine Sciences

Postdoc

About

18
Publications
5,129
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249
Citations
Introduction
Postdoctoral Researcher at the University of Gothenburg working to understand the ocean's role in climate.
Additional affiliations
March 2019 - February 2020
Council for Scientific and Industrial Research, South Africa
Position
  • PostDoc Position
February 2013 - November 2014
University of Cape Town
Position
  • Master's Student
Education
April 2015 - July 2018
University of Cape Town
Field of study
  • Physical Oceanography

Publications

Publications (18)
Article
Full-text available
Water mass transformation in the Southern Ocean is vital for driving the large‐scale overturning circulation, which transports heat from the surface to the ocean interior. Using profiling gliders, this study investigates the role of summertime buoyancy forcing and wind‐driven processes on the intraseasonal (1–10 days) mixed layer thermohaline varia...
Article
Full-text available
The subpolar Southern Ocean is a critical region where CO 2 outgassing influences the global mean air-sea CO 2 flux (F CO2 ). However, the processes controlling the outgassing remain elusive. We show, using a multi-glider dataset combining F CO2 and ocean turbulence, that the air-sea gradient of CO 2 (∆pCO 2 ) is modulated by synoptic storm-driven...
Article
Full-text available
In the sea ice-impacted Southern Ocean, the spring melt of sea ice modifies the upper ocean. These modified waters subduct and enter the global overturning circulation. Submesoscale processes act to modulate the stratification of the mixed layer and therefore mixed layer properties. Sparse observations mean that the role of submesoscales in exchang...
Article
Full-text available
Submesoscale flows in the ocean are energetic motions, O(1km), that influence stratification and the distributions of properties, such as heat and carbon. They are believed to play an important role in seaice- impacted oceans by modulating air-sea-ice fluxes and sea-ice extent. The intensity of these flows and their response to wind forcing are uno...
Article
Full-text available
Underwater gliders have become widely used in the last decade. This has led to a proliferation of data and the concomitant development of tools to process the data. These tools are focused primarily on converting the data from its raw form to more accessible formats and often rely on proprietary programing languages. This has left a gap in the proc...
Code
GliderTools is a Python 3.6+ package designed to process data from the first level of processing to a science ready dataset. The package is designed to easily import data to a standard column format (e.g. numpy, pandas, xarray). The following functions are included in the package: cleaning and smoothing functions (as secondary quality control; an o...
Article
Full-text available
Air-sea and air-sea-ice fluxes in the Southern Ocean play a critical role in global climate through their impact on the overturning circulation and oceanic heat and carbon uptake. The challenging conditions in the Southern Ocean have led to sparse spatial and temporal coverage of observations. This has led to a “knowledge gap” that increases uncert...
Article
Full-text available
Ocean stratification and the vertical extent of the mixed layer influence the rate at which the ocean and atmosphere exchange properties. This process has direct impacts for anthropogenic heat and carbon uptake in the Southern Ocean. Submesoscale instabilities that evolve over space (1-10 km) and time (from hours to days) scales directly influence...
Article
Full-text available
Current and future climate change poses a substantial threat to the African continent. Young scientists are needed to advance Earth systems science on the continent, but they face significant challenges.
Article
The 2013 Intergovernmental Panel on Climate Change report, using CMIP5 and EMIC model outputs suggests that the Atlantic Meridional Overturning Circulation (MOC) is very likely to weaken by 11–34% over the next century, with consequences for global rainfall and temperature patterns. However, these coupled, global climate models cannot resolve impor...
Article
Full-text available
Traditionally, the mechanism driving the seasonal restratification of the Southern Ocean mixed layer (ML) is thought to be the onset of springtime warming. Recent developments in numerical modelling and North Atlantic observations have shown that submesoscale ML eddies (MLE) can drive a restratifying flux to shoal the deep winter ML prior to solar...
Article
Full-text available
The Department of Science and Technology's (DST's) 10-year Global Change Grand Challenge programme requires platforms to 'attract young researchers to the region and retain them by exciting their interest in aspects of global change; while developing their capacity and professional skills in the relevant fields of investigation'. In addition, in Ju...
Article
Full-text available
Our view of the Antarctic Polar Front (APF) as a circumpolar biogeographic barrier is changing (Chown et al. 2015). Th e APF marks the convergent boundary between cold Antarctic water and warmer sub-Antarctic water, and has long been considered to prevent north-south dispersal in the Southern Ocean (reviewed by Clarke et al. 2005, Fraser et al. 201...

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Projects

Projects (2)
Project
This project aims to thoroughly and systematically observe and investigate the role and scales of the physical processes which modulate the full seasonal cycle of upper ocean physics in the seasonal ice zone of the Southern Ocean.