All future seminars

Número de entradas: 2

27
Octubre 2017

GNSS Transpolar Earth Reflectometry exploriNg system (G-TERN): a proposal for ESA EE9 co-led by ICE-CSIC/IEEC


Inicio: 12:30h
Ponente: Estel Cardellach Galí (ICE-CSIC)
Lugar: Sala Alberto Lobos

The GNSS Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA’s Earth Explorer 9 Revised Call by a team of 33 multi-disciplinary scientists and co-led by E. Cardellach (ICE-CSIC/IEEC) and J. Wickert (GFZ/Germany). The primary objective of the mission is to quantify…
Inicio: 12:30h
Ponente: Estel Cardellach Galí (ICE-CSIC)
Lugar: Sala Alberto Lobos

The GNSS Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA’s Earth Explorer 9 Revised Call by a team of 33 multi-disciplinary scientists and co-led by E. Cardellach (ICE-CSIC/IEEC) and J. Wickert (GFZ/Germany). The primary objective of the mission is to quantify crucial characteristics, processes and interactions between the sea ice and other Earth system components in order to advance the understanding and prediction of climate change and its impacts on the environment and society.  To contribute answering these questions G-TERN will measure key parameters of the sea ice, the oceans and the atmosphere with frequent and dense coverage over polar areas, becoming a ’dynamic mapper’ of the ice conditions, ice production and loss in multiple time and space scales, and surrounding environment. Over polar areas, G-TERN will measure sea ice surface elevation (<10 cm precision), roughness and polarimetry aspects at 30 km resolution and 3 days full coverage. G-TERN will implement the interferometric GNSS reflectometry concept (pioneered at ICE-CSIC/IEEC).  The lifetime would be 2025-2030 or optimally 2025-2035, covering key stages of the transition towards a Summer Arctic sea ice free. ESA will take a decision by the end of 2017 and proceed with Phase-A studies of two selected proposals. This seminar will provide an overview of G-TERN mission goals, techniques and suggested implementation.
31
Octubre 2017

On the trace anomaly of a Weyl fermion


Inicio: 12:00h
Ponente: Fiorenzo Bastianelli (University of Bologna and INFN, Bologna)
Lugar: Conference Room

We discuss the status of the trace anomaly of a massless chiral fermion in a curved background, which we calculate again using a Pauli-Villars regularization. The motivation of our analysis stems from recent claims that the trace anomaly might contain a term proportional to the topological Pontryagin…
Inicio: 12:00h
Ponente: Fiorenzo Bastianelli (University of Bologna and INFN, Bologna)
Lugar: Conference Room


We discuss the status of the trace anomaly of a massless chiral fermion in a curved background, which we calculate again using a Pauli-Villars regularization. The motivation of our analysis stems from recent claims that the trace anomaly might contain a term proportional to the topological Pontryagin density of the curved background. We do not find such a term in the trace anomaly.
Institute of Space Sciences (IEEC-CSIC)

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Phone: +34 93 737 9788
Email: ice@ice.csic.es
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An institute of the Consejo Superior de Investigaciones Científicas

An institute of the Consejo Superior de Investigaciones Científicas
Affiliated with the Institut d'Estudis Espacials de Catalunya

Affiliated with the Institut d'Estudis Espacials de Catalunya