Monday, February 6 2023 Sign In   |    Register
 

News Quick Search


 

News


Front Page
Power News
Today's News
Yesterday's News
Week of Feb 06
Week of Jan 30
Week of Jan 23
Week of Jan 16
Week of Jan 09
By Topic
By News Partner
Gas News
News Customization
Feedback

 

Pro Plus(+)


Add on products to your professional subscription.
  • Energy Archive News
  •  



    Home > News > Power News > News Article

    Share by Email E-mail Printer Friendly Print

    Offshore wind farms impact on ecosystems


    December 5, 2022 - CE Noticias Financieras

     

      Large-scale wind farms can strongly influence marine primary production as well as oxygen levels inside and outside wind farm areas.

      These are the findings of scientists from the Helmholtz-Zentrum Hereon, a North Sea research institute, published in the journal Communications Earth & Environment.

      Different wind conditions and currents, more precipitation and a changing surface climate: the effects of offshore wind farms in the North Sea are diverse and have not yet been fully investigated. Some of them are already occurring, others are still to be expected due to the constant expansion of wind turbines in large-scale wind farms. To better understand them and fill the remaining knowledge gaps, a team of researchers at the Hereon Institute for Modeling and Analysis of Coastal Systems is working on different key elements of the problem.

      For example, Nils Christiansen's team showed that turbulent wakes (air vortices caused by wind turbines) change the flow and stratification of the water beneath them. But the climate just above the sea surface is also changing permanently, as another team led by Dr. Naveed Akhtar was able to demonstrate.

      The latest study, led by Dr. Ute Daewel, now confirms that these impacts also lead to an altered spatial distribution of marine ecosystem components. This includes the distribution of nutrients, phyto- and zooplankton, as well as biomass in the sediment, the food base of many bottom-dwelling organisms.

      In the model study, the team assumed large-scale offshore wind farms planned in the North Sea. For deeper marine areas, the researchers found that the amount of biogenic carbon in the sediment would increase locally by 10% and the oxygen concentration, in an area where it is already very low, could decrease further.

      In addition, the wind shifts already tested would lead to a local modification of the primary phytoplankton production by up to +/- 10%. And this not only in the wind farm areas themselves, but also distributed throughout the southern North Sea. This means that even if the total production in the region changes very little, there is a spatial redistribution of production. This also has consequences for the distribution of zooplankton, the food base of many fish species. The early life stages of fish in particular often depend on the availability of zooplankton "at the right time in the right place".

      A spatial and temporal restructuring of zooplankton distribution can influence these process chains and thus positively or negatively affect the amount of fish available. Therefore, the small change in primary production would have a lasting impact on the entire food web in the southern North Sea.

      "Our results show that the large expansion of offshore wind farms will have a significant impact on the structuring of coastal marine ecosystems. We need to better understand these impacts quickly and also take them into account in the management of coastal ecosystems," concludes Ute Daewel in a statement.

    TOP

    Other Articles - Renewables & Alternative Energy


    TOP

       Home  -  Feedback  -  Contact Us  -  Safe Sender  -  About Energy Central   
    Copyright © 1996-2023 by CyberTech, Inc. All rights reserved.
    Energy Central® and Energy Central Professional® are registered trademarks of CyberTech, Incorporated. Data and information is provided for informational purposes only, and is not intended for trading purposes. CyberTech does not warrant that the information or services of Energy Central will meet any specific requirements; nor will it be error free or uninterrupted; nor shall CyberTech be liable for any indirect, incidental or consequential damages (including lost data, information or profits) sustained or incurred in connection with the use of, operation of, or inability to use Energy Central. Other terms of use may apply. Membership information is confidential and subject to our privacy agreement.