Changes in wave energy resources around Japan
Article first published online: 1 DEC 2012
©2012. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 39, Issue 23, 16 December 2012
How to Cite
2012), Changes in wave energy resources around Japan, Geophys. Res. Lett., 39, L23702, doi:10.1029/2012GL053845.(
- Issue published online: 1 DEC 2012
- Article first published online: 1 DEC 2012
- Manuscript Revised: 31 OCT 2012
- Manuscript Accepted: 31 OCT 2012
- Manuscript Received: 12 SEP 2012
- long-term trend;
- wave climate;
- wave energy
 The climatology and long-term trend of wave energy resources around Japan were estimated from in situ wave data measured at 25 observation points during 1980 to 2009. The climatological annual mean wave energy around Japan was estimated to be 6.4 kW m−1, and the long-term trend was 0.27 kW m−1/30-yr. Our results indicate that the long-term trend in wave energy varies among areas and seasons. There is a marked increasing trend in wave energy in the southern half of the east coast of Japan. Increased average wave period and height contributed to this trend on the east coast. We also found an increasing trend in surface wind speeds east of Japan. These results suggest that more frequent swells have been generating greater wave energy off Japan's east coast during the last decade.