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Department of Earth Sciences

 

Wed 22 Jan 14:00: Title to be confirmed

Earth Sciences talks - Fri, 17/01/2025 - 09:38
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Wed 05 Feb 14:00: Title to be confirmed

Earth Sciences talks - Fri, 17/01/2025 - 09:36
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Tue 28 Jan 12:00: Fluid Physics of Ice-Covered Oceans

Earth Sciences talks - Thu, 16/01/2025 - 15:46
Fluid Physics of Ice-Covered Oceans

Fluid processes in Earth’s polar regions can influence polar and global climate and may also allow for a better understanding of the physics governing climate systems of certain ice-covered planetary bodies. In this talk, I will describe how a particular Arctic Ocean mixing and heat transport process, diffusive convection, helps contextualize the warming Arctic through a synthesis of observational and theoretical approaches. In particular, we will discuss how different ocean mixing mechanisms impact distinct regions of the Arctic and how intermittent turbulence in a changing Arctic can disrupt the diffusive-convective process. I will also describe the development of a novel methodology for inferring ocean mixing metrics from oceanographic acoustic measurements, which helps elucidate how intermittent turbulence may interact with diffusive-convective structures. Finally, we will consider how models of Earth’s polar processes, adapted to understand ice-covered moons in the Solar System, can provide insight into planetary bodies where in-situ measurements are not available. Emphasis will be placed on how fluid dynamics can address current and future climate and environmental challenges both on Earth and elsewhere in the Solar System.

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Thu 23 Jan 11:30: TBC

Earth Sciences talks - Thu, 16/01/2025 - 11:52
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Thu 30 Jan 11:30: Multiphase Transport Phenomena and Energy Process Intensification

Earth Sciences talks - Thu, 16/01/2025 - 11:42
Multiphase Transport Phenomena and Energy Process Intensification

This talk will cover the following three aspects –

Micron-particle laden flow and heat transfer in confined geometry with separation-enhanced hydrogen production and carbon capture as an example.

Rheological behaviour and heat transfer of dilute suspensions of nanoparticles with cooling of high-power microelectronics as an example.

Microstructures and behaviour of thermal energy storage materials with composite phase change materials and composite thermochemical materials as examples.

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Wed 29 Jan 14:00: What’s shaking Mars? An overview of NASA’s InSight Mission

Earth Sciences talks - Wed, 15/01/2025 - 15:07
What’s shaking Mars? An overview of NASA’s InSight Mission

NASA ’s InSight lander deployed the first seismic station to the surface of Mars in 2018. The dataset collected over the next four years took us on a journey of discovery – from tiny quakes close to the lander to quakes on the opposite side of the planet; meteorite impacts and dust devils; solar panel shaking and hammering. We saw it all! In this talk I’ll walk you through the highs and lows of the mission and the seismic dataset: from launch to final transmission through deployment of the seismometer, first quake detection, determination of the core size, meteorite detection, core composition, surface waves, the biggest quake observed, and the last quake recorded. We’ll discover how one seismometer expanded our understanding of the composition and evolution of the red planet, look at some amazing images, and explore what more we can do with the dataset.

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Wed 12 Feb 14:00: Title to be confirmed

Earth Sciences talks - Wed, 15/01/2025 - 11:06
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Wed 12 Mar 14:00: Title to be confirmed

Earth Sciences talks - Wed, 15/01/2025 - 11:06
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Into the underworld

Sanne Cottaar is Professor of Global Seismology in Earth Sciences. She wants to understand Earth’s inner structure: how it shaped the surface and allowed life to form.

Categories: News

Into the underworld

Research News - Tue, 14/01/2025 - 10:41

Sanne Cottaar is Professor of Global Seismology in Earth Sciences. She wants to understand Earth’s inner structure: how it shaped the surface and allowed life to form.

Wed 05 Mar 17:30: Breaking the Ice: Abrupt climate change and deglaciation

Earth Sciences talks - Tue, 14/01/2025 - 04:08
Breaking the Ice: Abrupt climate change and deglaciation

The past glacial period and ensuing deglaciation were punctuated by multiple episodes of abrupt climate change. Despite decades of research, the causes of the rapid changes remain largely unknown, and, crucially, they are very difficult to reproduce with Earth System Models. In this seminar, I will present a series of recent and brand new climate model experiments for the last deglaciation, exploring the climate-ice-ocean interactions that trigger major abrupt changes in, for example, ocean circulation, surface temperature, ice volume and sea level. I will conclude the presentation with some of our work-in-progress using uncertainty quantification to produce the best and most rigorous models of climate change.

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