scholarly journals Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump

2006 ◽  
Vol 20 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Olivier Ragueneau ◽  
Sabine Schultes ◽  
Kay Bidle ◽  
Pascal Claquin ◽  
Brivaëla Moriceau
2019 ◽  
Vol 47 (3) ◽  
pp. 80-91
Author(s):  
V. G. Neiman

The main content of the work consists of certain systematization and addition of longexisting, but eventually deformed and partly lost qualitative ideas about the role of thermal and wind factors that determine the physical mechanism of the World Ocean’s General Circulation System (OGCS). It is noted that the conceptual foundations of the theory of the OGCS in one form or another are contained in the works of many well-known hydrophysicists of the last century, but the aggregate, logically coherent description of the key factors determining the physical model of the OGCS in the public literature is not so easy to find. An attempt is made to clarify and concretize some general ideas about the two key blocks that form the basis of an adequate physical model of the system of oceanic water masses motion in a climatic scale. Attention is drawn to the fact that when analyzing the OGCS it is necessary to take into account not only immediate but also indirect effects of thermal and wind factors on the ocean surface. In conclusion, it is noted that, in the end, by the uneven flow of heat to the surface of the ocean can be explained the nature of both external and almost all internal factors, in one way or another contributing to the excitation of the general, or climatic, ocean circulation.


Fisheries ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. 18-23 ◽  
Author(s):  
Vladimir Sauskan ◽  
Viktor Osadchii ◽  
Aleksandr Arkhipov

A role of Russian science is increasing along with domestic fisheries development in the world Ocean. One of the main tasks of researchers is to protect the interests of Russian fisheries on the international level. Such protection is based on living resources investigation and formulation of recommendations on their sustainable development, taking into account the international regulations’ and bilateral agreements’ demands.


Oceanology ◽  
2021 ◽  
Vol 61 (4) ◽  
pp. 450-458
Author(s):  
V. M. Kukushkin ◽  
M. Yu. Markina ◽  
S. K. Gulev ◽  
S. A. Dobrolyubov

Author(s):  
Holthus Paul

This chapter discusses the role of the World Ocean Council (WOC) and the international ocean business community in global ocean governance (GOG). It first provides an overview of the institutional development and profile of the WOC before considering the work and role and work of the WOC on ocean governance with and for the ocean business community. It then examines the Sustainable Development Goals (SDGs) in relation to ocean business and the WOC, as well as the size, complexity trends in the ocean economy and ocean business community, which are fundamental to understanding their importance to GOG. It also analyses GOG issues relevant to the ocean business community and WOC that the United Nations and its associated bodies must address and concludes with an assessment of the role of the ocean business community and WOC in the future of the GOG agenda.


2007 ◽  
Vol 7 (4) ◽  
pp. 10043-10063 ◽  
Author(s):  
H. Yang ◽  
Y. Gao

Abstract. Aeolian dust provides the major micronutrient of soluble Fe to organisms in certain regions of the global ocean. In this study, we conduct numerical experiments using the MOZART-2 atmospheric chemistry transport model to simulate the global distribution of soluble Fe flux and Fe solubility. One of the mechanisms behind the hypothesis of acid mobilization of Fe in the atmosphere is that the coating of acidic gases changes dust from hydrophobic to hydrophilic, a prerequisite of Fe mobilization. We therefore include HNO3, SO2 and sulfate (SO42−) as dust transformation agents in the model. General agreement in Fe solubility within a factor of 2 is achieved between model and observations. The total flux of soluble Fe to the world ocean is estimated to be 731–924×109 g yr−1, and the average Fe solubility is 6.4–8.0%. Wet deposition contributes over 80% to total soluble Fe flux to most of the world oceans. Special attention is paid to the relative role of HNO3 versus SO2 and sulfate. We demonstrate that coating by HNO3 produces over 36% of soluble Fe fluxes compared to that by SO2 and sulfate combined in every major oceanic basin. Given present trends in the emissions of NOx and SO2, the relative contribution of HNO3 to Fe mobilization may get even larger in the future.


2020 ◽  
Vol 1 (2) ◽  
pp. 1-6
Author(s):  
Yevhen Borshchuk ◽  
Yurii Dumiak

The objective of the article is a systemic analysis of the approaches to reformation of the customs sphere, determination of the role of customs service in the process of ensuring a sustainable development under the present-day conditions. Eurointegration strategy of Ukraine necessitates the need for reformation of the national customs system in order to conform to the standards of the World Customs Organization and the perspective adaptation to the European requirements, elaboration of the development strategy with the purpose of integration with the developed countries of the world, harmonization of economic trade and ecological processes. Methodology. In the course of this analysis the customs service was considered as a complex open system with application in the research of the methodology of systemic analysis, which allowed to put emphasis on separate aspects of the specific character of its functioning. Results. In any country, customs service is an integral part of the system of state administration of the foreign economic activity, one of the important state institutes of social and economic processes administration. It ensures the balance of interests of all participants of international trade enshrined in the current conventions and agreements on the level of the international law. Modernization of the national customs system under the conditions of the European integration processes has to become an important mechanism of social and economic development and international collaboration of Ukraine. Under the present-day conditions customs service plays an important role in the achievement of goals established by the UN in the sphere of sustainable development till 2030. Some of these goals are directly connected with the strategic mission of the customs service and that is why it is important to ensure appropriate conditions for functioning of the customs service for the successful accomplishment of the tasks of sustainable development in the social, economic and ecological spheres. The key priorities of activities of the national customs system must ensure accomplishment of the main tasks of the customs authorities in the context of achieving the goals of sustainable development formulated by the World Customs Organization: formation of the favorable, safe, just and sustainable business environment for economic growth, ensuring social justice, facilitation of improving stability of the global, national and regional ecological systems and combating the climate changes. Practical implications. The performed analysis of particularities of the customs system functioning and its objectives allows to determine the role of the customs service in the achievement of the Goals of sustainable development till 2030, to highlight the key priorities in resolving the environmental problems, to form the potential of sustainable development. For Ukraine these are modernization of national society and minimization of consequences of existence of the corruption schemes. Value/originality. The use of the systemic analysis allows to detect the main problems in functioning of the customs service taking into consideration the specific character of its functioning under the present-day conditions.


2018 ◽  
Vol 54 (6) ◽  
pp. 594-607
Author(s):  
N. G. Iakovlev ◽  
E. M. Volodin ◽  
D. V. Sidorenko ◽  
A. S. Gritsun

Author(s):  
Sergii Snigirov ◽  
Sergiy Sylantyev

AbstractGlobal warming and connected acidification of the world ocean attract a substantial amount of research efforts, in particular in a context of their impact on behaviour and metabolism of marine organisms, such as Cnidaria. Nevertheless, mechanisms underlying Cnidarians’ neural signalling and behaviour and their (possible) alterations due to the world ocean acidification remain poorly understood. Here we researched for the first time modulation of GABAA receptors (GABAARs) in Actinia equina (Cnidaria: Anthozoa) by pH fluctuations within a range predicted by the world ocean acidification scenarios for the next 80–100 years and by selective pharmacological activation. We found that in line with earlier studies on vertebrates, both changes of pH and activation of GABAARs with a selective allosteric agonist (diazepam) modulate electrical charge transfer through GABAAR and the whole-cell excitability. On top of that, diazepam modifies the animal behavioural reaction on startle response. However, despite behavioural reactions displayed by living animals are controlled by GABAARs, changes of pH do not alter them significantly. Possible mechanisms underlying the species resistance to acidification impact are discussed.


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