Introductory Course On Statistical Modeling Of Extreme Values

Speaker: 
Hans Wackernagel

Affiliation: 
Equipe de GEOSTATISTIQUE - MINES ParisTech - PSL

Seminar Date: 
31. May 2018 - 10:15 - 1. June 2018 - 15:00

Extreme value theory is based on different principles than those
of conventional statistics as it is designed to study and model
exceptional events rather than the average characteristics of
natural phenomena.

This two-day introductory course will start by presenting
exploratory tools to analyze the behavior of extreme values in
geophysical data. This will help to motivate the basic principles
of the statistical modeling of extreme values and the
distributions that characterize them. The two common approaches
for assessing the risk of extreme events at a given level, i.e.

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Ocean Acoustic Tomography in the North Atlantic

Speaker: 
Brian Dushaw

Affiliation: 
Nansen Center, Bergen, Norway

Seminar Date: 
15. May 2018 - 13:00 - 14:00

An objective mapping exercise was used to assess the resolution capabilities of ocean acoustic tomography in combination with Argo floats. Basis functions for a basin-wide area are derived from a covariance computed using an ocean state estimate. As is demonstrated by the formal uncertainty estimates from this computation, Argo and tomography are complementary measurements. In several examples, each separately gives results with comparable uncertainty, while when both are employed, uncertainties are reduced by O(50%).

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On the ongoing development of a new rheological model for a better representation of the drift and deformation of sea ice

Speaker: 
Véronique Dansereau

Affiliation: 
Centre National de la Recherche Scientifique - Institut des Sciences de la Terre, Grenoble, France, and Nansen Environmental and Remote Sensing Center, Bergen, Norway

Seminar Date: 
29. May 2018 - 11:00 - 11:30

Dansereau, V.*, Weiss, J., Saramito, P., Rampal, P., Bouillon, S., Olason, E.

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Nansen Guest Lecture: Dynamical down scaling: How confident are the projections?

Speaker: 
Professor Jens Hesselbjerg Christensen

Affiliation: 
Københavns Universitet

Seminar Date: 
19. February 2018 - 12:00 - 12:30

Info about Jens:
Jens Hesselbjerg Christensen is professor in climate at University of Copenhagen, since 2017. Before he was at DMI, and head of the Danish Climate Center. Jens has been enrolled in the IPCC work for many years, and has been Lead Author on many important IPCC reports.
He is a world leading scientist on Regional Climate Modeling (RCM) with focus on high latitude conditions.