Hourly-profiles:
Daily time series plots for wind speed (ms-1) and direction with height using hourly
averaged SODAR data. The dates range from September 13, 2009 until November 10,
2009 excluding days with incomplete data sets on September 14, October 14, and
October 15.
80m Wind speed, TKE, and wind shear plots:
Time series plots of the hourly averaged wind speed (ms-1) at 80m height, TKE
calculated from 80m hourly averaged σu, σv, and σw, and wind shear of the 80m and 50m
wind speeds. The dates range from September 11, 2009 until November 10, 2009
excluding October 14.
80m Wind rose plots:
Weekly frequency of occurrence of the ten-minute averaged wind speed (ms-1) and
direction at the 80m level from September 13, 2009 until November 10, 2009.
Data Availability chart:
The percentage of hours of missing data for each day at the 20m, 80m, and 100m levels
for September 11, 2009 until November 10, 2009.
Average Wind Speed and Wind Shear chart:
Average of the ten-minute averaged wind speed and average wind shear between 50m20m, 80m-50m, and 100m-80m for September 11, 2009 until November 10, 2009.
Average Summary:
The average wind speed profile shows wind speeds increasing from 20m to 80m then
slightly decreasing from 80m to 100m. This can also be seen with the change in sign of
the wind shear between 80m and 100m. While positive between 20m to 50m and 50m to
80m, the wind shear becomes negative between 80m and 100m. This decrease could be
due to less data availability at higher levels. It is seen in the data availability chart that the
percentage of data available decreases at higher levels. At the 20m level there is 94.65%
of data available which decreases to 29.03% at the160m level. Looking at the 80m wind
speed and direction frequency of occurrence from September 11, 2009 until November
10, 2009, it is seen that the winds are mostly from the Northeast in between 5-10 ms-1.
The average wind speed for the 80m level as seen in Table 2 is 6.07 ms-1.
Daily Plots Summary:
Winds are mostly from the northwest or northeast for the duration of the two months as
seen in the daily wind profiles. Data is more available during the daytime hours rather
than during the night. The winds are more regularly from the northeast as seen in the plot
of frequency of occurrence of the 80m wind speed and direction. However there is a
difference in the week of 10/11/2009-10/17/2009, where the winds are coming more from
the southwest. On October 13, 2009, there was a storm system that came through the area
and shut of power to the SODAR until October 15, 2009. This storm could be the reason
for the shift in wind direction from the southwest as well as an increased frequency of
higher wind speeds of 12-18 ms-1. The daily peak in 80m wind speeds, as seen from the
daily time series plots, seems to be in the afternoon hours and also shows a peak in wind
shear between 80m and 50m levels. However, the peak of 80m TKE seems to be in
between 10am and 2pm.