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Spatio-temporal characteristics of wind observations over South Korea: 1982–2011

Spatio-temporal characteristics of wind observations over South Korea: 1982–2011 Abstract In this study, we investigate the spatial and temporal characteristics of long-term (1982–2011) wind measurements over South Korea. First, ground-based measurements are adjusted to standard 10 m above ground level using a modified wind-profile power law, to account for wind variation in the actual measurement height. Then, wind climatology, variability, and long-term trends were calculated using the daily wind-speed series. The spatially averaged annual mean wind speeds over South Korea were found to be characterized by a light breeze (approximately 2 m s−1). Seasonality in the mean wind speed was generally influenced by the monsoonal flow; wind speeds were higher in winter and spring than in summer and autumn. However, the tendencies of near-surface wind speed showed opposite values at clustered stations regardless of season. There were negative trends with −0.028 m s−1 a−1 for 25% of the stations (R1) and positive trends with 0.020 m s−1 a−1 for 75% of the stations (R2). We found that the annual trends in the two regions (R1 and R2) were statistically significant and homogenous for all time-varying percentiles over 12 months of the year. Our study also identified that geo-spatial features such as elevation, land-use, geographical setting, and urbanization have large impacts on the spatiotemporal characteristics of the local wind speed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Asia-Pacific Journal of Atmospheric Sciences" Springer Journals

Spatio-temporal characteristics of wind observations over South Korea: 1982–2011

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Publisher
Springer Journals
Copyright
2013 Korean Meteorological Society and Springer Science+Business Media Dordrecht
ISSN
1976-7633
eISSN
1976-7951
DOI
10.1007/s13143-013-0049-3
Publisher site
See Article on Publisher Site

Abstract

Abstract In this study, we investigate the spatial and temporal characteristics of long-term (1982–2011) wind measurements over South Korea. First, ground-based measurements are adjusted to standard 10 m above ground level using a modified wind-profile power law, to account for wind variation in the actual measurement height. Then, wind climatology, variability, and long-term trends were calculated using the daily wind-speed series. The spatially averaged annual mean wind speeds over South Korea were found to be characterized by a light breeze (approximately 2 m s−1). Seasonality in the mean wind speed was generally influenced by the monsoonal flow; wind speeds were higher in winter and spring than in summer and autumn. However, the tendencies of near-surface wind speed showed opposite values at clustered stations regardless of season. There were negative trends with −0.028 m s−1 a−1 for 25% of the stations (R1) and positive trends with 0.020 m s−1 a−1 for 75% of the stations (R2). We found that the annual trends in the two regions (R1 and R2) were statistically significant and homogenous for all time-varying percentiles over 12 months of the year. Our study also identified that geo-spatial features such as elevation, land-use, geographical setting, and urbanization have large impacts on the spatiotemporal characteristics of the local wind speed.

Journal

"Asia-Pacific Journal of Atmospheric Sciences"Springer Journals

Published: Aug 1, 2013

References