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Pelagic coelenterates in the Atlantic sector of the Arctic Ocean : species diversity and distribution as water mass indicators

Mańko M. K., Panasiuk-Chodnicka A. A., Żmijewska M. I.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 4

466--479

EN

Marginal seas of the Arctic Ocean are well recognized as one of the richest ecosystems in the world’s ocean, being at the same time the most vulnerable to climate change. Such vulnerability affects the distribution of water masses, thus influences the pelagic species dispersal and local diversity. For certain reasons some plankton species can be used as indicators of water mass distribution. Although the use of copepods and chaetognaths in such a manner is well documented, still little is known about the potential of pelagic Coelenterata as possible indicator species; they are still poorly investigated in this part of the Arctic Ocean. Therefore, a survey of these gelatinous animals was conducted in a transect between the Norwegian, Greenland, and Barents Seas in summer 2011. A total of 21 taxa were encountered and the most abundant was Aglantha digitale. Species distribution coupled with hydrological analysis of the investigated area enabled us to establish the water mass indicator taxa. Therefore, A. digitale was connected with the Atlantic Water Mass, while Bougainvillia superciliaris and large numbers of ctenophores were correlated with the Arctic Water Mass. The results presented herein may provide the basis for developing new tools to analyze changes in the Arctic Ocean.

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Osvoenie melkovodnyh neftegazovyh mestorozdenij arkticeskogo selfa s ispol’zovaniem ledostrojkoj stacionarnoj platformy na monoopore

Gusejnov C. S., Musabirov A. A.

Prace Naukowe Instytutu Nafty i Gazu

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2012

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nr 182 wyd. konferencyjne

851--852

EN

Interest in the hydrocarbon resources of the Arctic Ocean increases. It focuses on the largest offshore fields of Russia regarding expected hydrocarbon reserves. Active works are conducted for exploration the shelf of the Kara Sea. There two perspective areas are here: Yamalshelf and waters of the Gulf of the Ob and the Taz. Assimilation of resources in these areas using offshore oil and gas constructions become complicated by difficult meteorological and hydrological conditions, and by the presence of weak silty ground. A new technical solution of offshore oil and gas construction for assimilation shallow shelf of these waters is being proposed. A base of the platform is a ballasted buoyant bottom plate with very wide surface, and solidly coupled with a supporting block perpendicularly fixed to the base. The supporting block of the platform is acylindrical pillar with diameter of 20 m. This form is for little touch with ice and for providing necessary solidity and rigidity of the platform, and this form provides unblocked passing of ice fields around the construction. A topside is right-angled and has a U-type cut on one side for providing of docking and undocking of three decks with the supporting block. Each deck has its own functional destination: building and installation, drilling and operational. The field development is operated by work and consistent changing of these decks.

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The integrated Arctic Ocean Observing System (iAOOS): an AOSB-CliC Observing Plan for the International Polar Year

Dickson B.

Oceanologia

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2006

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No. 48 (1)

5-21

EN

The debate on the climatic impact of Arctic change is currently focused on the fate of the perennial sea-ice and the climatic and social effects of its disappearance. Developments in our observing techniques mean that we are in prospect of being technically able to describe the ocean-atmosphere-cryosphere system of high northern latitudes operating as a complete system for the first time. Understanding this system and improving its predictability in models seems to be our most direct way of extending the ability of society to mitigate for or adapt to its changes, including global change. The integrated Arctic Ocean Observing System (iAOOS), described here, is a means of piecing together the available PIs, gear, ships and funding on the pan-Arctic scale that seems necessary to making the attempt, and the International Polar Year (2007-2009) provides the necessary stimulus for doing so.