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News

August 2018
 
New publications with participation of IOW's Marine Geophysics:
Kreuzburg et al ( https://www.frontiersin.org/articles/10.3389/feart.2018.00103/full ) deal with the coastal evolution offshore the Hütelmoor, located close to IOW.
 
Stevenson et al. (https://www.nature.com/articles/s41467-018-05042-6) reconstruct the sediment concentration of a large submarine gravity flow that happened in 1929.
 
 
June 2018 New article published

A new paper exploring the use of multi-frequency multibeam for the identification of subtle seafloor fratures was published in the special issue "Geological Seafloor Mapping" of the journal geosciences. The paper is open access and accessible here:
 
tl_files/staff/feldens/paper1.PNG
 
 
May 2018 GEOHAB 2018

A large part of the BONUS ECOMAP team gathered in Santa Barbara, California, to attend the 2018 GEOHAB conference. Prominent topics during the meeting were calibrated multi-spectral backscatter measurements, and the need to create a spectral catalogue detailing the appearance of different seafloor types. Inken Schulze's participation and talk concering multispectral multibeam surveys during the conference was supported by a Ron McDowell student award. 
 
 
Feb. 2018 Research cruise EMB176 completed
 
A 10 day cruise targeting the Darss Sill in the south-western Baltic Sea was successfully completed. During the cruise, we collected new data, extending the area that was mapped by the Bundesamt for Seeschifffahrt and Hydrographie (BSH) into shallow waters. We expect that the new data will give insight into the Holocene evolution of the Darss Sill. Apparently, the morphology of the Darss Sill was shaped by a number of erosional events. However, details on cause, timing and magnitude of these events are currently poorly understood. The attached image shows side scan sonar data that gives information about seafloor composition, processed by Franz Tauber, on draped on a bathymetric map of the Darss Sill area. 
 
tl_files/staff/feldens/darsil.PNG
 
 
Dec. 2017
 

The Bonus ecomap PINGO platform launched:  https://bonusecomappingo.wikispaces.com/. PINGO presents the online knowledge dissemination platform of the EU funded BONUS project ECOMAP (http://www.bonus-ecomap.eu) that started in September 2017. 

Over the coming years, we will here built up a knowledge base valuable for researchers, authorities, remote sensing manufacturers, and survey companies. It highlights experience on newly developed devices, data examples about calibrated acoustic and LiDAR backscatter data, and shows the potential also by latest data processing techniques developed in ECOMAP. For example the MBES snippet backscatter data is of great interest to surveying companies for cable route pre-surveys and the discrimination of stone-reefs against outcropping till. Improved subbottom techniques are of great interest to the cable route surveying industry, and also valuable for archaeological tasks. Improved remote sensing of the water column as suggested in ECOMAP will facilitate nautical least depth detection of ship wrecks and is of general interest for the fishery industry. The new data will be documented together with workflows and respective processing, filtering, and visualization algorithms by open source computer code for download for the community.
 
 
Nov. 2017
 
Ecomap officially commences with Kick-Off meeting in Kiel. Over the next three years, we will work to improve marine remote sensing with regard to geologic and biologic habitats.
 
Further information:
 
http://www.bonus-ecomap.eu/
 
Oct. 2017 Surveying the Hütelmoor:
 
tl_files/staff/feldens/huetelmoore_backscatter.png
Map of backscatter intensities offshore the Hütelmoor as an indication of seafloor composition. Brighter colours correspond to coarser sediment. 
 
The acoustic and geological surveys offshore the Hütelmoor are finised for 2017. The resulting data will be used to reconstruct the Holocene evolution of the coastline, and will serve as a basic dataset for work within the BALTIC Transcoast project.  
 
 
Oct. 2017 New publication:  To improve the use of proxies derived from acoustic remote sensing data, the impact of the survey geometry must be understood. The importance of the incidence angle for textures in acoustic-derived images is the topic of the new article "Sensitivity of texture parameters to acoustic incidence angles in multibeam backscatter", publsiehd within the IEEE Geoscience and Remote Sensing Letters. 
 
 
Sept. 2017 ECOMAP starts: 
 
ECOMAP
 
The EU funded project ECOMAP commenced on Sept. 1st. Within the project, we will explore new ways to utilize acoustic data to identify and monitor benthic habitats. More information: BONUS ECOMAP
 
 
 
Jul. 2017 Survey Prerow Bank:
tl_files/staff/feldens/first_data.png
One survey day worth of data above the prerow bank. The difference in resolution and the appearance of new morphological features when compared with available low-resolution bathymtric data is readily apparant. 
 
In cooperation with the "Nationalparkamts Vorpommern", a bathymetric and geologial survey of the Prerow Bank started. The aim is to better understand the morphological development in response to the Holocene Sea level rise and recent sediment dynamic of this protected seascape. 
 

Jun. 2017 Rostock's Eleven 2017: 
Mischa Schönke was awarded ffirst place of the science competition "Rostock's Eleven 2017" for his talk with the title "Wie klingt ein Wurm" [Sounds of a worm], presenting results of his research concerned with the improvement of marine benthic habitat mapping. Some results are published: https://link.springer.com/article/10.1007/s00367-016-0491-1
 
Focus
 
The working group "Marine Geophysics" within the Marine Geology section of IOW is concerned with imaging the seafloor and the upper 50 m of the subsurface using a combination of geophysical und sedimentological methods. 
 
A key topic of our research is the improvement of optical and acoustical remote sensing techniques used to identify and monitor geological and biological parameters of seafloor habitats in shallow waters.  Further research questions are concerned with the reconstruction of the Pleistocene and Holocene evolution of sedimenary systems in marginal seas in response to climate change and sea level fluctuations. Our research is primarily conducted in the Baltic Sea, but also the North Sea, North Atlantic and the Red Sea. 
 
Research of the Marine Geophysics working group is strongly embedded in IOW's reseach focus "Changing Ecosystems" and "Coastal Seas and Society". 
Head of the working group

Dr. Peter Feldens 

 

Staff

Dr. Franz Tauber 

Gerald Nickel 

Inken Schulze 

Mischa Schönke