The North Sea — A shelf sea in the Anthropocene.


Contact
mirco.scharfe [ at ] awi.de

Abstract

Global and regional change clearly affects the structure and functioning of ecosystems in shelf seas. However, complex interactions within the shelf seas hinder the identification and unambiguous attribution of observed changes to drivers. These include variability in the climate system, in ocean dynamics, in biogeochemistry, and in shelf sea resource exploitation in the widest sense by societies. Observational time series are commonly too short, and resolution, integration time, and complexity of models are often insufficient to unravel natural variability from anthropogenic perturbation. The North Sea is a shelf sea of the North Atlantic and is impacted by virtually all global and regional developments. Natural variability (from interannual to multidecadal time scales) as response to forcing in the North Atlantic is overlain by global trends (sea level, temperature, acidification) and alternating phases of direct human impacts and attempts to remedy those. Human intervention started some 1000 years ago (diking and associated loss of wetlands), expanded to near-coastal parts in the industrial revolution of the mid-19th century (river management, waste disposal in rivers), and greatly accelerated in the mid-1950s (eutrophication, pollution, fisheries). The North Sea is now a heavily regulated shelf sea, yet societal goals (good environmental status versus increased uses), demands for benefits and policies diverge increasingly. Likely, the southern North Sea will be re-zoned as riparian countries dedicate increasing sea space for offshore wind energy generation with uncertain consequences for the system's environmental status. We review available observational and model data (predominantly from the southeastern North Sea region) to identify and describe effects of natural variability, of secular changes, and of human impacts on the North Sea ecosystem, and outline developments in the next decades in response to environmental legislation, and in response to increased use of shelf sea space.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Research Networks
Publication Status
Published
Eprint ID
39567
DOI 10.1016/j.jmarsys.2014.03.012

Cite as
Emeis, K. C. , van Beusekom, J. , Callies, U. , Ebinghaus, R. , Kannen, A. , Kraus, G. , Kröncke, I. , Lenhart, H. , Lorkowski, I. , Matthias, V. , Möllmann, C. , Pätsch, J. , Scharfe, M. , Thomas, H. , Weisse, R. and Zorita, E. (2015): The North Sea — A shelf sea in the Anthropocene. , Journal of Marine Systems, 141 , pp. 18-33 . doi: 10.1016/j.jmarsys.2014.03.012


Share
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email


Citation

Geographical region
N/A

Research Platforms
N/A

Campaigns
N/A


Actions
Edit Item Edit Item