Seminar

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Weekly Lunch Seminars / Thursday Seminars - an open seminar for all

Sea Ice Parameter Retrieval with Physical Synergy of Active and Passive Satellite Data

Speaker: 
Dr. Shiming Xu
Affiliation: 
Department of Earth System Science, Tsinghua University, China
Seminar Date: 
27. March 2019 - 13:00 - 13:45

Sea ice is a key component in the global climate system. Satellite remote sensing is the major approach to the basin-scale observation of sea ice, informing the community of key findings including accelerated shrinkage and drastic thinning of the sea ice cover. As the major method for the estimation of sea ice thickness, satellite altimetry is hindered by the snow cover over the sea ice, which introduces large uncertainty to the sea ice thickness retrieval. Meanwhile, the snow over is a direct indicator of polar hydrological cycle, and a key modulating factor of air-ice-sea interaction.

Model Calibration Using Warping Metrics: With Application to Sea Ice Deformation in MPM-ice

Speaker: 
Christian Sampson
Affiliation: 
University of North Carolina in Chapel Hill
Seminar Date: 
25. February 2019 - 11:30 - 12:00

Sea Ice is a critical component of earth’s climate system and mediates a broad range of physical processes in the Arctic, such as ocean-atmosphere interaction. Increased warming in the Arctic has drastically changed sea ice dynamics in the region and the ice composition, thinner and more first year ice, and an increased marginal ice zone. Accurate representation of lead formation is now more important than ever for the calculation of important climatological variables, such as oceanic heat flux.

Two-way nesting in coupled atmosphere-ocean modelling

Speaker: 
Prof. (emeritus) Dr. Lars Petter Røed
Seminar Date: 
17. January 2019 - 12:30 - 13:30

Nansen Lecture based on Røed's recently published book by Springer titled: “Atmosphere and Ocean on Computers”.

Applications of operational oceanography product to fisheries management and operation

Speaker: 
Dr. Hiromichi Igarashi
Affiliation: 
JAMSTEC, Yokohama, Japan
Seminar Date: 
3. December 2018 - 12:30 - 13:10

Operational oceanography products, reanalysis, NRT analysis and forecast ocean state, can provide us a variety of value-added information useful for fishery stock management, monitoring and efficient fishery operation. In this talk, applications of the operational products to the operational fisheries in the North Pacific conducted by JAMSTEC data synthesis research group will be presented.

A Nested-Grid Snow Modeling System

Speaker: 
Dr. Glen E. Liston
Affiliation: 
Colorado State University
Seminar Date: 
14. November 2018 - 11:00 - 12:45

Over the last 35 years, Dr. Liston has developed a snow-evolution modeling system (MicroMet, SnowModel, and SnowAssim) that can be used for a wide range of snow and other cold-season, cold-region applications. The model formulation is general enough to allow simulations over temporal domains spanning days to decades, and spatial domains spanning from local measurement sites to pan-Arctic regions at spatial resolutions ranging from 1-m to 10-km.

Responsible Research and Innovation - why should we start thinking about it?

Speaker: 
Dorothy Dankel
Affiliation: 
University of Bergen
Seminar Date: 
23. October 2018 - 12:30 - 13:30

This 2-part presentation starts with an easy intro to Responsible Research and Innovation (RRI) and putting RRI in the context of NFR and Horizon2020 proposal writing (30 min) followed by discussion Q/A and RRI exercises for moe in-depth exposure.

CIMR: the Passive Microwave Satellite Mission for Copernicus.

Speaker: 
Thomas Lavergne,
Affiliation: 
MET Norway
Seminar Date: 
31. October 2018 - 12:30 - 13:10

EU is currently planning the future of its fleet of Earth Observation missions: the Sentinels. To serve the EU integrated Arctic policy from 2025, several candidate missions are under study. One of the candidate, the Copernicus Imaging Microwave Radiometer (CIMR) is an advanced Passive Microwave Radiometer mission, improving on the now 40 years capability of SMMR, SSM/I(S), and AMSRs. The two primary objectives of CIMR are all-weather, high-resolution, high-accuracy, sub-daily observations of sea-ice concentration (SIC), and sea-surface temperature (SST).

Crossing the Southern Ocean: How the parameterization of poleward heat transport may differ from that of the real world

Speaker: 
Matthew Hecht
Affiliation: 
LANL, USA
Seminar Date: 
22. October 2018 - 12:30 - 13:10

As the only major ocean basin that allows for circumpolar flow, with no continental boundaries against which zonal pressure gradients may be established, the Southern Ocean has been singled out as a region in which transient mesoscale eddies are especially important. When effects of bathymetry on the flow are considered, however, transient eddies alone need not generate the entire poleward heat transport that compensates the equatorward heat transport forced by the prevailing westerly winds.

Cross shelf dynamics in the Agulhas Current region from GlobCurrent and glider observations

Speaker: 
Tumelo Maja
Affiliation: 
Nansen-Tutu, University of Cape Town, South Africa and Council for Scientific and Industrial Research
Seminar Date: 
27. September 2018 - 12:30 - 13:00

The Agulhas Current is the strongest western boundary current in the southern hemisphere and a major driver of variability for coastal regions along South Africa’s eastern shores. Interactions between the Agulhas Current and the steep and narrow continental shelf drive a range of instabilities at the meso (50 – 200 km) and sub-meso (<10 km) scales, such as the shedding of eddies, plumes and filaments, as well as the meandering or intrusion of the current onto the shelf (Krug et al., 2017).

Simultaneous ensemble-based state and parameter estimation for earth systems

Speaker: 
Fuqing Zhang
Affiliation: 
Pennsylvania State University
Seminar Date: 
28. September 2018 - 11:00 - 12:00

We seek to develop and apply a generalized data assimilation framework using Ensemble-based Simultaneous State and Parameter Estimation (ESSPE) that will facilitate data-model integration and uncertainty quantification for the broad weather, climate and earth science communities.

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