Index Geophysics

Comparative Evaluation of the Third-Generation Reanalysis Data for Wind Resource Assessment of the Southwestern Offshore in South Korea

This study evaluated the applicability of long-term datasets among third-generation reanalysis data CFSR, ERA-Interim, MERRA, and MERRA-2 to determine which dataset is more suitable when performing wind resource assessment for the ‘Southwest 2.5 GW Offshore Wind Power Project’, which is currently underway strategically in South Korea. The evaluation was performed by comparing the reanalyses with offshore, onshore, and island meteorological tower measurements obtained in and around the southwest offshore. In the pre-processing of the measurement data, the shading sectors due to a meteorological tower were excluded from all observation data, and the measurement heights at the offshore meteorological towers were corrected considering the sea level change caused by tidal difference. To reflect the orographic forcing by terrain features, the reanalysis data were transformed by using WindSim, a flow model based on computational fluid dynamics and statistical-dynamic downscaling. The comparison of the reanalyses with the measurement data showed the fitness in the following order in terms of coefficient of determination: MERRA-2 > CFSR = MERRA > ERA-Interim. Since the measurement data at the onshore meteorological towers strongly revealed a local wind system such as sea-land breeze, it is judged to be inappropriate for use as supplementary data for offshore wind resource assessment.

Hyun-Goo Kim

Jin-Young Kim

Yong-Heack Kang

reanalysis data

wind resource assessment

CFSR

ERA-Interim

MERRA

MERRA-2

South Korea

Meteorology. Climatology

QC851-999

MDPI AG

2018-02-01T00:00:00Z

article

2073-4433

10.3390/atmos9020073

https://doaj.org/article/32e79c89fe8041ab8f682bbd608ed393

Atmosphere, Vol 9, Iss 2, p 73 (2018)

EN

http://www.mdpi.com/2073-4433/9/2/73

https://doaj.org/toc/2073-4433

Journal Licence: CC BY