Previous Seminars

Ocean Atmosphere Interaction in the Agulhas Current System

Speaker: 
Mathieu Rouault
Affiliation: 
Nansen Tutu Center for Environmental Research, University of Cape Town, South Africa
Seminar Date: 
8. October 2013 - 11:15 - 12:00

Oceans gain heat at the Equator and in upwelling areas and lose it in western boundary currents such as the Gulf Stream, the Kuroshio or the Agulhas Current. This loss of energy is due to a sea surface temperature contrast between western boundary currents and their surroundings, leading to a high evaporation rate and substantial turbulent latent and sensible heat fluxes. In that respect, the Agulhas Current system has an important role to play in global climate on top of its role on the exchange of heat and salt between the Indian and Atlantic Oceans.

A quantitative description of the West Spitsbergen Current by using altimetry'

Speaker: 
Stefan Muckenhuber
Affiliation: 
UNIS / University of Graz - Austria.
Seminar Date: 
20. September 2013 - 13:00 - 13:30

Stefan will present his Master thesis which his has carried out at UNIS

Microclimate of the Bergen valley: An attempt of reconstruction using geostatistical and turbulence-resolving models

Speaker: 
Mikhail Varentsov
Affiliation: 
Moscow State University
Seminar Date: 
19. September 2013 - 12:30 - 13:15

Complex microclimate features of the Bergen valley microclimate were reconstructed using geostatistical and turbulence-resolving models. The geostatistical model (kriging) is used to interpolate the temperature observations from 7 closely located meteorological stations and the remote-sensing temperature profiling by MTP-5 instrument in the central Bergen valley. The challenge was to recover temperature variations induced by the surface elevation and heterogeneity differences. The temperature was reconstructed with high spatial resolution of 30 m for selected atmospheric conditions.

Actor-based system-dynamic approach to Integrated Assessment modelling

Speaker: 
Dr. Dmitry V. Kovalevsky
Affiliation: 
Nansen International Environmental and Remote Sensing Center, St. Petersburg, Russia
Seminar Date: 
11. July 2013 - 12:30 - 13:00

Most of conventional Integrated Assessment (IA) models of coupled climate-socioeconomic system are deeply enrooted in general equilibrium paradigm and therefore have limited success in describing non-linearities, thresholds, path dependence and out-of-equilibrium dynamic features of real-world economic systems. As an alternative to a plethora of neoclassical optimal growth models, an actor-based system-dynamic approach to economic modeling is proposed.

Simulations of turbulent air-sea interaction with a coupled atmosphere-ocean turbulence-resolving model PALM

Speaker: 
Igor Esau
Seminar Date: 
27. June 2013 - 12:30

The Parallelized Atmospheric Large-eddy simulation Model (PALM) was modified to simulate turbulent interactions in a coupled atmospheric and upper ocean mixed layers. A set of numerical experiments with PALM in the coupled mode was conducted to study co-organization of the free convection in the atmosphere and the ocean – a regime frequently observed in the wintertime in North Atlantic and Nordic Sea regions. The experiments demonstrate an important role of the latent (in the atmosphere) – salt (in the ocean) turbulent flux in dynamical coupling of these two fluid media on turbulent scales.

Climate change impacts and responses in Bangladesh

Speaker: 
Atiq Rahman
Affiliation: 
Executive Director of Bangladesh Center for Advanced Studies
Seminar Date: 
21. June 2013 - 11:15 - 12:00

Climate change impacts and responses in
Bangladesh
By
Dr. Atiq Rahman
Executive Director of Bangladesh Center for Advanced Studies

Semesteroppgave: The MyOcean web portal: what is there and how to use it?

Speaker: 
Raymond Sellevold
Affiliation: 
BSc student, GFI
Seminar Date: 
13. June 2013 - 11:00 - 12:00

Intra-seasonal, Inter-annual and decadal variabilities of Indian Summer Monsoon Rainfall

Speaker: 
P.V. Joseph
Affiliation: 
Nansen Environmental Research Centre India Professor Emeritus, Cochin University of Science and Technology
Seminar Date: 
12. June 2013 - 10:15 - 11:00

Indian Summer Monsoon Rainfall has three prominent variabilities, namely those on Intraseasonal,
Inter-annual and Decadal time scales. The Active-Break cycle of monsoon is the
most important intra-seasonal variability. Inter-annual variability is manifested in the time
of onset of the monsoon system and in the quantum of monsoon season rainfall of India.
Three decade long epochs having frequent years of droughts in monsoon season rainfall and
equally long epochs having in-frequent monsoon droughts have occurred alternately during

Diminishing Arctic Sea Ice and its Impacts on Winter Climate

Speaker: 
Dr. Jiping Liu
Affiliation: 
State University of New York and Institute of Atmospheric Physics, Chinese Academy of Sciences
Seminar Date: 
7. June 2013 - 11:15 - 12:00