the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Underestimation of strong wind speeds offshore in ERA5: evidence, discussion, and correction
Abstract. Offshore Wind power plants have become an important element of the European electrical grid. Studies of metocean site conditions (wind, sea state, currents, water levels) form a key input to the design of these large infrastructure projects. Such studies heavily rely on reanalysis datasets which provide decades-long model time series over large areas. In this article, we address a known deficiency of one these reanalysis datasets, ERA5, namely that it underestimates strong wind speeds offshore. For doing so, comparisons are made against CFSR/CFSv2 reanalyses as well as high quality wind energy specific in-situ measurements from floating LiDAR systems. The ERA5 surface drag formulation and its sea state dependency are analysed in detail, the conditions of the bias identified, and a correction method is suggested. The article concludes with proposing practical and simple ways to incorporate publicly available, high-quality wind energy measurement datasets in air-sea interaction studies alongside legacy measurements such as met buoys.
- Preprint
(3471 KB) - Metadata XML
- BibTeX
- EndNote
Status: final response (author comments only)
-
RC1: 'Comment on wes-2024-27', Anonymous Referee #1, 09 Apr 2024
- AC1: 'Reply on RC1', Rémi Gandoin, 11 May 2024
-
RC2: 'Comment on wes-2024-27', Anonymous Referee #2, 09 Apr 2024
- AC2: 'Reply on RC2', Rémi Gandoin, 11 May 2024
Viewed
HTML | XML | Total | BibTeX | EndNote | |
---|---|---|---|---|---|
804 | 207 | 22 | 1,033 | 12 | 15 |
- HTML: 804
- PDF: 207
- XML: 22
- Total: 1,033
- BibTeX: 12
- EndNote: 15
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1