scholarly journals Marine biological shifts and climate

2014 ◽  
Vol 281 (1783) ◽  
pp. 20133350 ◽  
Author(s):  
Grégory Beaugrand ◽  
Eric Goberville ◽  
Christophe Luczak ◽  
Richard R Kirby

Phenological, biogeographic and community shifts are among the reported responses of marine ecosystems and their species to climate change. However, despite both the profound consequences for ecosystem functioning and services, our understanding of the root causes underlying these biological changes remains rudimentary. Here, we show that a significant proportion of the responses of species and communities to climate change are deterministic at some emergent spatio-temporal scales, enabling testable predictions and more accurate projections of future changes. We propose a theory based on the concept of the ecological niche to connect phenological, biogeographic and long-term community shifts. The theory explains approximately 70% of the phenological and biogeographic shifts of a key zooplankton Calanus finmarchicus in the North Atlantic and approximately 56% of the long-term shifts in copepods observed in the North Sea during the period 1958–2009.

Author(s):  
Māris Kļaviņš ◽  
Zanita Avotniece ◽  
Valērijs Rodinovs

Abstract The sea ice regime is considered to be a sensitive indicator of climate change. This study investigates long-term changes in the ice regimes of the Gulf of Riga along the coast of Latvia in comparison with those of inland waters. The ice regime of the studied region indicates the impact of climate change related to increasing air and sea water temperatures. Ice cover duration on both the sea and inland waters has decreased during recent decades. In addition, long-term records on ice break in the studied region exhibit a pattern of periodic changes in the intensity of ice regime, while trends of the sea ice regime are not consistent between periods of time. Alternating mild and severe winters also occur. The ice regime was shown to be strongly influenced by large-scale atmospheric circulation processes over the North Atlantic, as indicated by close correlation with the North Atlantic Oscillation index.


2010 ◽  
Vol 152 (3) ◽  
pp. 631-641 ◽  
Author(s):  
Jean-Yves Barnagaud ◽  
Pierre André Crochet ◽  
Yann Magnani ◽  
Ariane Bernard Laurent ◽  
Emmanuel Menoni ◽  
...  

2021 ◽  
Vol 25 (5) ◽  
pp. 65-71
Author(s):  
V.V. Drozdov ◽  
G.T. Frumin ◽  
A.V. Kosenko

The review and analysis of the long-term variability of the average annual and average air temperature for winter and summer, as well as the values of the amounts of atmospheric precipitation in St. Petersburg were carried out. The correlation between the dynamics of the values of these indicators and the intensity of atmospheric circulation over the North Atlantic in the form of the NAO1 index (North Atlantic Oscillation) was estimated. The possible environmental consequences of climate change in the region of St. Petersburg are justified.


Author(s):  
Robert H. Ellison

Prompted by the convulsions of the late eighteenth century and inspired by the expansion of evangelicalism across the North Atlantic world, Protestant Dissenters from the 1790s eagerly subscribed to a millennial vision of a world transformed through missionary activism and religious revival. Voluntary societies proliferated in the early nineteenth century to spread the gospel and transform society at home and overseas. In doing so, they engaged many thousands of converts who felt the call to share their experience of personal conversion with others. Though social respectability and business methods became a notable feature of Victorian Nonconformity, the religious populism of the earlier period did not disappear and religious revival remained a key component of Dissenting experience. The impact of this revitalization was mixed. On the one hand, growth was not sustained in the long term and, to some extent, involvement in interdenominational activity undermined denominational identity; on the other hand, Nonconformists gained a social and political prominence they had not enjoyed since the middle of the seventeenth century and their efforts laid the basis for the twentieth-century explosion of evangelicalism in Africa, Asia, and South America.


2018 ◽  
Vol 45 (21) ◽  
pp. 11,827-11,836 ◽  
Author(s):  
Jason Holt ◽  
Jeff Polton ◽  
John Huthnance ◽  
Sarah Wakelin ◽  
Enda O'Dea ◽  
...  

2005 ◽  
Vol 2 (1) ◽  
pp. 87-96 ◽  
Author(s):  
H. Thomas ◽  
Y. Bozec ◽  
H. J. W. de Baar ◽  
K. Elkalay ◽  
M. Frankignoulle ◽  
...  

Abstract. A carbon budget has been established for the North Sea, a shelf sea on the NW European continental shelf. The carbon exchange fluxes with the North Atlantic Ocean dominate the gross carbon budget. The net carbon budget – more relevant to the issue of the contribution of the coastal ocean to the marine carbon cycle – is dominated by the carbon inputs from rivers, the Baltic Sea and the atmosphere. The North Sea acts as a sink for organic carbon and thus can be characterised as a heterotrophic system. The dominant carbon sink is the final export to the North Atlantic Ocean. More than 90% of the CO2 taken up from the atmosphere is exported to the North Atlantic Ocean making the North Sea a highly efficient continental shelf pump for carbon.


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