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Sea surface warming and ocean-to-atmosphere feedback driven by large-scale offshore wind farms under seasonally stratified conditions

Journal Article · · Science Advances
 [1];  [1];  [2];  [3];  [4]
  1. University of Hawai’i, Mānoa, Honolulu, HI (United States); Woods Hole Oceanographic Institution, MA (United States)
  2. Woods Hole Oceanographic Institution, MA (United States); University of Bonn (Germany)
  3. Johns Hopkins University, Baltimore, MD (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  4. Woods Hole Oceanographic Institution, MA (United States)
Offshore wind farms may induce changes in the upper ocean and near-surface atmosphere through coupled ocean-atmosphere feedbacks. Yet, the role of air-sea interactions mediated by offshore wind farms remains poorly understood. Using fully coupled ocean-atmosphere-wave model simulations for seasonally stratified conditions along the US East Coast, we show that simulated cumulative reductions in wind stress due to large-scale wind farm clusters lead to sea surface warming of 0.3° to 0.4°C and a shallower mixed layer. This warming drives upward heat fluxes, destabilizing the atmospheric boundary layer and enhancing wind stress, which partially offsets wake-induced wind deficits. These wake-ocean interactions influence near-surface meteorology and air-sea fluxes, suggesting that a coupled modeling approach may be necessary for assessing potential oceanographic impacts of offshore wind developments. However, ocean coupling exerts limited influence on winds at turbine-relevant heights or within downstream wakes, resulting in minimal impact on long-term energy. These findings suggest that models without ocean coupling may be adequate for wind energy applications.
Research Organization:
National Laboratory of the Rockies (NLR), Golden, CO (United States); Woods Hole Oceanographic Institution, MA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308; EE0009424
OSTI ID:
3016200
Alternate ID(s):
OSTI ID: 3029665
Report Number(s):
NLR/JA-5000-92724
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 45 Vol. 11; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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