Séminaires 2019

Publié le 1er octobre 2019
Séminaire de Ryan Holmes (Sydney) le 1er octobre 2019 à 11h, salle de réunion MEOM, 1er étage site Bergès

Title : Global ocean heat transport and mixing in the eastern tropical Pacific
Abstract : The ocean transports vast amounts of heat around the planet, helping to regulate regional climate. In this talk I will discuss a framework that relates the ocean’s meridional heat transport to the diabatic processes of air-sea heat fluxes and mixing that move heat across temperature classes. Applied to a global ocean model the framework emphasizes the role of upwelling in the eastern tropical Pacific, (…)

Publié le 25 septembre 2019
Séminaire de Erland Schulson (Hanover, NH, USA), mercredi 25 septembre à 14h, salle Lliboutry, bât de Glaciologie

Title : Kinetic Friction of Ice
Abstract :
The sliding of ice upon ice is a fundamental process in ice mechanics, from extraterrestrial icy satellites to terrestrial sea ice covers. At root is the interaction of asperities that protrude from opposing faces. In this talk I will review the effect of sliding velocity on the coefficient of kinetic friction of ice sliding over itself at low velocity. At very low velocities, the coefficient is governed by creep deformation. At higher (…)

Publié le 10 juillet 2019
Séminaire de Ibrahim Hoteit, mercredi 10 juillet 2019 à 11h, salle Lliboutry, bât. de Glaciologie

Abstract :
The talk will present the integrated data-driven modeling system that we are developing to study and understand the physical and biological variability of the Red Sea. I will first describe the modeling system and summarize our key findings on the Red Sea general circulation, including the striking seasonally overturning circulation, the dominant eddy activity, the occasional northern deep water formation events, and discuss their impact on the Red Sea ecosystem. I will then (…)

Publié le 3 juillet 2019
Séminaire de Baylor FOX-KEMPER, mercredi 3 juillet à 14h, salle Lliboutry, bât. de Glaciologie

Abstract :
Surface gravity waves are small (1-100m) and fast (1-10s), so they often are neglected in traditional climate modeling where the emphasis is on slower, larger-scale motions. However, it has recently become clear that these waves energize boundary layer turbulence and entrainment, which in turn affect the climate system. Additionally, direct interactions between these waves and mesoscale and sub-mesoscale fronts, filaments, and instabilities have been theorized recently and (…)

Publié le 27 juin 2019
Séminaire de Michael Sigl, jeudi 27 juin 2019 à 10h30, salle Lliboutry, bât de Glaciologie

Michael Sigl,
Climate and Environmental Physics (CEP), Physics Institute
& Oeschger Centre for Climate Change Research (OCCR)
University of Bern
Séminaire animé par Joël Savarino.

Publié le 19 juin 2019
Séminaire de F. Wania le Mercredi 19 Juin 2019 à 10h en salle Lliboutry, Bât. Glaciologie

Title : Identifying, Understanding and Quantifying Contaminant Amplification Processes
Frank Wania Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, Canada M1C 1A4
Abstract : Because the “dose makes the poison”, environmental chemists try to identify the locations of high contaminant concentrations and thus elevated exposure. Under most circumstances, concentrations decline with increasing distance from source (…)

Publié le 11 juin 2019
Séminaire de B. Gastineau (LPED, Marseille), le Mardi 11 Juin 2019 à 10h30 en salle Lliboutry, Bât. Glaciologie

Titre : Laboratoire Population-Environnement-Développement : entre interdisciplinarité, gouvernance partagée et faire ensemble
Bénédicte Gastineau,
directrice du LPED, Marseille
Résumé : Au 1er janvier 2018, le Laboratoire Population - Environnement - Développement démarre un nouveau quinquennal avec un projet scientifique revisité, une nouvelle direction, l’arrivée de plusieurs nouveaux chercheurs et personnels administratifs. Ces changements motivent des membres du laboratoire à (…)

Publié le 6 juin 2019
Séminaire de M. Curran (AAD, Australia), le Jeudi 6 Juin 2019 à 11h en salle Lliboutry, Bât. Glaciologie

Title : Australian ice core research current projects (Law Dome, Aurora Basin North and Mount Brown South) and future plans (Million Year Ice Core).
By Dr Mark A J Curran, Senior ice core chemist at Australian Antarctic Division and Antarctic Climate & Ecosystems CRC, Australia
Dr Curran will introduce the Australian ice core research group and outline current projects with French collaboration, including the Aurora Basin North ice core project, which France is a key partner. Dr (…)

Publié le 23 mai 2019
Séminaire de F. Azam, le Jeudi 23 Mai 2019 à 10h en salle Lliboutry, bât. Glaciologie

Himalayan glaciers : What they are up to ?
Séminaire de Mohd Farooq Azam, Indian Institute of Technology Indore (MP)
Abstract : Understanding responses of the Himalaya–Karakoram (HK) glaciers to changing climate is crucial for over 900 million people who partly depend on meltwater in HK river basins. A comprehensive review of the status and changes in length, area and mass of glaciers as well as river hydrology along the HK region is done under the climate change context. Glaciological (…)

Publié le 22 mai 2019
Séminaires de Edwin D. Waddington (University of Washington), mercredi 22 mai à 10h, salle Lliboutry, bât de Glaciologie

Analytical Depth-Age and Particle Paths in a Transient Dansgaard-Johnsen Model
New Perspectives on Polar Firn Compaction