Abstract
The reanalysis of sea surface wind speed is compared with the measured wind speed of five offshore wind towers in Zhejiang, China. The applicability of reanalysis data in the Zhejiang coastal sea surface and the climatic characteristics of sea surface wind power density is analyzed. Results show that the reanalysis of wind field data at the height of 10 m can well capture the wind field characteristics of the actual sea surface wind field. The sea surface wind power density effective hours increases from west to east and north to south. Then Empirical orthogonal function (EOF) is used to analyze the sea surface wind power density anomaly field, and the first mode is a consistent pattern, the second mode is a North-South dipole pattern, the third mode is an East-West dipole pattern respectively. The stability of wind energy resources grows more stable with increasing distance from the coast, and the northern sea area which is far away from the coastal sea is more stable than that of the southern sea area. The yearly linear trend of sea surface wind power density is in an East-West dipole pattern respectively. The wind energy resources are more stable farther from the coast, and the wind energy resources in the northern sea are more stable than that of the southern sea. The yearly linear trend of sea surface wind power density is the East-West dipole type, the seasonal linear trend is a significant downward trend from West to East in spring, and on the contrary in summer, a non-significant trend in autumn and winter. The monthly change index shows that the linear trend near the entrance of Hangzhou Bay in Northern Zhejiang is of weak increase or decrease, which is good for wind energy development. When the wind power density is between 0 and 150 W·m−2, its frequency mainly shows the distribution trend of high in the West and low in the East, but the wind power density is between 150 and 600 W·m−2, its distribution is the opposite.
Highlights
With the rapid development of human society, all kinds of fossil fuels have been overdeveloped and used, and further causing a dramatic increase in greenhouse gases [1,2,3]
2) Zhejiang is rich in sea surface wind energy resources: according to the effective wind energy hours, the actual effective wind energy hours measured by the offshore wind tower exceed 80%
In the east-west direction, the percentage of effective wind energy hours increases with longitude; in the north-south direction, it increases as latitude decreases
Summary
With the rapid development of human society, all kinds of fossil fuels have been overdeveloped and used, and further causing a dramatic increase in greenhouse gases [1,2,3]. Analyze the spatial and temporal variation characteristics of sea surface wind energy, EOF analyzed the annual average power density anomaly field of sea surface wind energy in 40 years, as shown, the variance contribution rate of the first three modes reached 87.3% and passed the North significance test. The center is in the southeast of Zhejiang coastal sea area, the value of space field contours near Zhejiang coastal is small, which indicates that the inter-annual variation of the wind power density in the Zhejiang coastal area is smaller than that in the eastern sea area, the time coefficient in Figure 7D shows an obvious upward trend, and it mainly presents positive anomaly value in recent years. When the wind power density is between 0–150 W·m−2, the frequency mainly shows the distribution trend of high in the west and low in the east, when the wind power density is between 150–600 W·m−2, the frequency mainly shows the distribution trend of high in the east and low in the west
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
