Diurnal and seasonal variation in surface wind at Sita Eliya, Sri Lanka |
| |
Authors: | L Zubair |
| |
Institution: | (1) International Research Institute for Climate Prediction, Lamont Doherty Earth Observatory of Columbia University, Palisades, New York, USA, US |
| |
Abstract: | Summary Hourly measurements of surface winds at Sita Eliya (6° 58′ N, 80° 46′ E, 1860 m a.s.l.) located atop the North-South mountain ridge in Sri Lanka were analyzed to investigate the diurnal and seasonal variation
in the wind climate. Surface winds are dominated by the monsoon regimes, with Northeasterlies from November to January, Southwesterlies
from February to May and Westerlies and Northwesterlies from June to October. Through most of the year, the average wind speed
is around 6–8 m/s. However from June to August, it is around 10–14 m/s. Wind in June is gusty due the location of the low-level
Easterly jet over Sri Lanka. The wind undergoes a reversal in both zonal and meridional directions in March and November coincident
with the migration of the Inter-Tropical Convergence Zone. Notwithstanding the period from May to September being designated
as the Southwest monsoon, the wind is from West, South-West-West and North-North-West. During the Southwest monsoon, wind
speed during the night is nearly as high as that during the day. This anomalous diurnal variation in wind speeds may be related
to orographic influences. The high wind speeds at Sita Eliya, in conjunction with the moderate diurnal and seasonal variability
in wind speed, is suitable for wind-energy generation.
Received January 2, 2001 Revised May 26, 2001 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|