Previous Seminars

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The Gap Analysis for Integrated Atmospheric ECV CLImate Monitoring (GAIA-CLIM) project

Speaker: 
Anna Mikalsen
Seminar Date: 
30. January 2018 - 14:00 - 15:00

The aim of the "Gap Analysis for Integrated Atmospheric ECV CLImate Monitoring" (GAIA-CLIM) project is to improve our ability to use ground-based and sub-orbital observations (non-satellite observations) to characterise satellite observations for a number of atmospheric Essential Climate Variables (ECVs).

The Role of Simulated Small-Scale Ocean Variability in Inverse Computations for Ocean Acoustic Tomography

Speaker: 
Polar Acoustics and Oceanography (Brian Dushaw)
Seminar Date: 
23. January 2018 - 11:15 - 11:45

Ocean acoustic tomography depends on a suitable reference ocean environment with which to set the basic parameters of the inverse problem. Some inverse problems may require a reference ocean that includes the small-scale variations from internal waves, small mesoscale, or spice. Tomographic inversions that employ data of stable shadow zone arrivals, such as those that have been observed in the North Pacific and Canary Basin, are an example. Estimating temperature from the unique acoustic data that have been obtained in Fram Strait is another example.

Development of the operational oceanography system for fishery management and its application in the Central North Pacific Ocean

Speaker: 
Ocean Modeling (Tsuyoshi Wakamatsu)
Seminar Date: 
9. January 2018 - 11:15 - 11:45

The central North Pacific region centred on the international date line and 40N is known to be one of the richest fishing ground of neon flying squid in the North Pacific Ocean. We developed regional ocean environment analysis system, Scalable Kit of Under-sea Information Delivery system (SKUIDs) for providing potential fishing ground information to fishing operators for achieving quasi-operational habitat monitoring/management and economical optimization of fishing operation at this site.

AIS data, Processing and analysis for navigation

Speaker: 
Ocean and Sea Ice Remote Sensing (Mohamed Babiker)
Seminar Date: 
12. December 2017 - 11:15 - 11:45

In several expeditions, SAR images were transferred to icebreakers and ships travelling in the Arctic. The results of this work, which have demonstrated the benefits of using satellite data to support Arctic shipping, have been published in several papers and a book [Johannessen et al, 2000, 2007]. In the last decade, a large number of SAR images from ENVISAT and RADARSAT-2 have been collected and analysed by scientists, showing SAR images can be used to classify ice types, estimate ice concentration and detect icebergs and other dangerous ice phenomena [e.g.

Towards making NERSC a primary data and service provider

Speaker: 
Scientific Data Management (Aleksander Vines & Tor I. Olaussen)
Seminar Date: 
5. December 2017 - 11:15 - 11:45

Scientists at NERSC combine observations, models and data assimilation to advance the understanding of the environment, and to develop innovative solutions and services for our stakeholders. A significant amount of effort goes into generation and documentation of datasets, and both scientists and the center should receive due credit. As the size and number of datasets produced and utilized at NERSC is steadily increasing, the need for a systemised organisation of this data emerges. In addition, RCN and EU require, as a general rule, that data produced shall be published with open access.

INTAROS: Integrated Arctic Observing System – WP4: Enhance community-based observing.

Speaker: 
Polar Acoustics and Oceanography (Lisbeth Iversen)
Seminar Date: 
1. December 2017 - 11:15 - 11:45

The overall objective in the INTAROS WP 4 is to enhance community-based observing for participatory research and capacity-building. There are several specific objectives in this workpackage. Task 1 will survey and analyze existing community-based observing programs, building on Report of SAON Task 9, in order to identify capabilities, ’best’ practices, and challenges in current Community-Based Monitoring Programs in the Arctic. Task 2 will advance tools for cross-fertilizing indigenous and local knowledge with scientific knowledge, and make examples of Arctic CBM manuals broadly available.

Modeling the Turkish Straits System and using Data Assimilation as a tool for observing network design

Speaker: 
Data Assimilation (Ali Aydoğdu)
Seminar Date: 
28. November 2017 - 11:15 - 11:45

A high-resolution unstructure mesh model of the Turkish Straits System (TSS) is developed. Multi-year simulations of the TSS are performed for the integral system using realistic atmospheric forcing between 2008-2013. The dynamics and circulation of the system is analyzed using a multi-year numerical simulations for the first time. The TSS, being the bridge between the Black and Mediterrean Seas, is a crucial component for the operational forecast systems of the two marginal seas.

Climate change in Georgia

Speaker: 
Mariam Elizbarashvili
Affiliation: 
University, Tbilisi, Georgia
Seminar Date: 
9. November 2017 - 14:30 - 15:30

Mariam Elizbarashvili is visitor of Yongqi

On the statistical properties of sea ice lead fraction and heat fluxes in Arctic

Speaker: 
Sea Ice Modelling (Einar Olason)
Seminar Date: 
17. October 2017 - 11:15 - 11:45

Heat flux through leads and polynyas is an order of magnitude larger than that through unbroken ice. In this presentation we explore some statistical properties observed in Arctic sea ice lead fraction, showing that our model (neXtSIM) does a good job at reproducing the observed statistics. Given the importance of heat flux through leads we then use the model to explore the statistical properties of the modelled heat fluxes. We show that the model reproduces well the probability density function (PDF) and the mono-fractal spatial scaling of observed lead fluxes in the Central Arctic.

Two new PhD students at NERSC presents themselve and their projects.

Speaker: 
Artem Moiseev and Fabio Mangini
Seminar Date: 
12. October 2017 - 12:30 - 13:00