ODINECET Journals catalogue

This catalogue gives access to the Union List of serials available at the ODINECET-Group aquatic libraries. Full records of serials published in the ECET-region, and holdings per library at the following institutions are already included:

 

  • Russian Federal Research Institute of Fishery and Oceanography/VNIRO (Russia)
  • Polar Research Institute of Marine Fisheries and Oceanography (Russia)
  • Research Institute of the Azov Sea Fisheries Problems (Russia)
  • AtlantNIRO (Russia)
  • K.A. Timiryazev Moscow Agricultural Academy (Russia)
  • Limnological Institute RAN (Russia)
  • Institute of Biology of the Southern Seas (Ukraine)
  • Marine Hydrophysical Institute (Ukraine)
  • Estonian Marine Institute of the University of Tartu (Estonia)


A priority goal is to optimize Interlibrary Lending Service within the Association through improvement of the access to detailed information on serials available at the aquatic libraries of Central and Eastern Europe. Requests for articles from this catalogue can be sent through the EURASLIC mailinglist. For this service, you have to be a member of EURASLIC, please consult these pages to learn how to become a member.

All interested aquatic libraries in the ECET-region are invited to add information about their serial holdings to the List. Go to the ODINECET-website and contact the group responsible on how to join this initiative.

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1300-m-high rising bubbles from mud volcanoes at 2080m in the Black Sea: Hydroacoustic characteristics and temporal variability
Greinert , J.; Artemov, Y.; Egorov, V.; De Batist, M.; McGinnis, D. (2006). 1300-m-high rising bubbles from mud volcanoes at 2080m in the Black Sea: Hydroacoustic characteristics and temporal variability. Earth Planet. Sci. Lett. 244(1-2): 1-15. dx.doi.org/10.1016/j.epsl.2006.02.011
In: Earth and Planetary Science Letters. Elsevier: Amsterdam. ISSN 0012-821X; e-ISSN 1385-013X
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Open Marine Archive 227747 [ download pdf ]
Author keywords
    Sorokin Trough; Black Sea; mud volcanoes; bubble seepage; timely variability; hydroacoustic plume; flare; bubble dissolution modeling
Authors  Top 
  • Greinert, J.
  • Artemov, Y.
  • Egorov, V.
  • De Batist, M.
  • McGinnis, D.
Abstract
    A mud volcano area in the deep waters (> 2000 m) of the Black Sea was studied by hydroacoustic measurements during several cruises between January 2002 and June 2004. Gas bubbles in the water column give strong backscatter signals and thus can be detected even in great water depths by echosounders as the 38 kHz EK500 scientific split-beam system that was used during the surveys. Because of their shape in echograms and to differentiate against geochemical plumes and real upwelling bubble-water plumes, we call these hydroacoustic manifestations of bubbles in the water column ‘flares’. Digital recording and processing of the data allows a 3D visualization and data comparison over the entire observation period, without artefacts caused by changing system settings.During our surveys, we discovered bubble release from three separate mud volcanoes, Dvurechenskiy (DMV), Vodianitskiy (VMV) and the Nameless Seep Site (NSS), in about 2080 m water depth simultaneously. Bubble release was observed between 9 June 2003 and 5 June 2004. The most frequently surveyed, DMV, was found to be inactive during very intensive studies in January 2002. The first activity was observed on 27 June 2002, which finally ceased between 5 and 15 June 2004 after a period of continuously decreasing activity. This observed 2-yr bubble-release period at a mud volcano may give an indication for the duration of active periods. The absence of short-term variations (within days or hours) may indicate that the bubble release from the observed mud volcanoes does not undergo rapid changes. The recorded echograms show that bubbles rise about 1300 m high through the water column, to a final water depth of about 770 m, which is ~75 m below the phase boundary of pure methane hydrate in the Black Sea. With a release depth from 2068 m and a detected rise height of 1300 m, the flare at VMV is among the deepest and highest reported so far, and gives evidence of highly extended bubble life times (up to 108 min) in deep marine environments.To better understand how a methane bubble (gas analyses of the pore water and gas hydrate gave 99.4% methane) can rise so high without dissolving, we applied a recently developed bubble dissolution model that takes into account a decreased mass transfer due to an immediately formed gas-hydrate rim. Using the hydroacoustically determined bubble rising speeds (19–22 cm/s at the bottom; 12–14 cm/s at the flare top) and the relation between the rising speed of ‘dirty’/gas hydrate rimmed bubbles and the bubble size, we could validate that a gas-hydrate-rimmed bubble with a diameter of 9 mm could survive the 1300-m-rise through the water column, before it is finally dissolved. A diameter of about 9 mm is reasonable for bubbles released at seep sites and the coincidence between the observed bubble rising speed and the model approach of a 9-mm bubble supports the assumption of gas-hydrate-rimmed bubbles.
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