Previous Seminars

Development of an experimental parametric acoustical array as a new tool for long-range ocean monitoring

Speaker: 
Igor Esipov
Affiliation: 
Gubkin oil and gas university/ Andreyev Acoustics institute, Moscow
Seminar Date: 
6. October 2011 - 11:15 - 12:00

The new experimental facility for remote acoustics oceanography research has been developed with EU financial support through International Science and Technology Center (ISTC) http://www.istc.ru (project 3770). This facility is based on power transmitting parametric acoustical array, operating on principals of nonlinear acoustics. Practice of parametric array application shows it directivity pattern can be very sharp and almost undependable on the frequency, therefore parametric array could provide wide frequency band single mode sound signal excitation in the ocean waveguide.

Assimilation of ICESat freeboard data into a coupled ice-ocean model with the EnKF

Speaker: 
Christof König Beatty
Affiliation: 
UCL, Louvain la Neuve, Belgium.
Seminar Date: 
23. September 2011 - 12:30 - 13:00

To be added.

Radar altimetry of sea ice: transformation of ice freeboard to thickness

Speaker: 
Vitaly Alexandrov
Affiliation: 
Nansen International Environmental and Remote Sensing Centre, St Petersburg
Seminar Date: 
9. September 2011 - 13:00

Spring Arctic Oscillation-East Asian summer monsoon connection through circulation changes over the western North Pacific

Speaker: 
Daoyi Gong
Affiliation: 
Beijing Normal University
Seminar Date: 
1. September 2011 - 12:30 - 13:00

SAR signatures of oceanic internal waves in the Barents Sea

Speaker: 
Igor Kozlov
Affiliation: 
NIERSC/RSHU
Seminar Date: 
11. August 2011 - 12:30 - 13:00

In this work Synthetic Aperture Radar (SAR) signatures of oceanic internal waves (IW) in the Barents Sea for June-October 2007 are investigated. In general 554 internal wave packets were identified on 69 Envisat ASAR images. Interaction of tidal currents with bottom topography is suggested to be the main source of IW’s generation for the most of observed packets.

Atmosphere-ocean heat exchanges during pre-monsoon tropical cyclones in the Bay of Bengal

Speaker: 
Lakshmi Srikanth
Affiliation: 
Anna University, Chennai, India Nansen scientific society, Bergen.
Seminar Date: 
26. July 2011 - 12:15 - 13:00

Ocean heat is an important source of energy for the devastating tropical cyclones that are regularly generated in the Bay of Bengal.

Lakshmi will examine the oceanic heat loss related to tropical cyclones in the Bay of Bengal in the pre-monsoon season, when most heat is available.
Differences of heat potential before and after four selected cyclones in the years 1996 to 2003 are computed both from satellite data and HYCOM model results.

Global warming of the ocean surface - regional variations and their causes

Speaker: 
Sara de la Rosa
Seminar Date: 
16. June 2011 (All day)

Trial lecture; given topic; PhD

PhD defense: The influence of input uncertainties on remotely sensed estimates of ocean primary production

Speaker: 
Svetlana Milutinovic
Seminar Date: 
10. June 2011 - 10:15 - 13:00

PhD defense

The Role of External forcings in the ARCWARM

Speaker: 
Lingling Suo
Seminar Date: 
19. May 2011 - 12:30 - 13:00

ARCWARM refers to the Arctic Early 20th century warming. The observed Arctic warming, which lasted for several decades during early 20th century, is comparable with present-day warming in terms of magnitude. Although the more recent warming is widely attributed to the human-induced increase of greenhouse gases, the causes and mechanisms for the early 20th century warming are less clear.

Studies of the Martian Polar boundary-layer

Speaker: 
Richard Devy
Seminar Date: 
12. May 2011 - 12:30 - 13:00

A coupled boundary layer – aeolian dust model of the Martian atmosphere is presented. This model was developed to determine how radiation scattering, absorption and emission by dust affects the boundary layer and, in turn, how this affects the dust distribution in the atmosphere. This was achieved by coupling a planetary boundary layer (PBL) model with a dynamical dust model. The model is applied to the 1977B dust storm optical data of Viking Lander 1 and our analysis indicates a significant improvement over previous 1D studies of dust storm decay.