c. Threshold minimum velocity of 10.0 m s1.
Figure 7 (cont.). Seasonal wind rose diagrams for the five sites and for Prudhoe Bay using
three threshold minimum velocities.
resulting in low-density strata in the nascent snow cover. By the end of October
the mean winds at SAG and IMN, the more exposed upland locations, increase.
Also during this time, the dispersion in wind speed at BET increases and remains
relatively high for the ensuing three-month period.
With the exception of PRU, the likelihood of moderate to strong winds (4.5
m s1) decreases from WS to EC for all sites and is less than 30% for the upland
locations. Both BET and FRA continue to show a bias for winds from the NE and
SW, but winds with an easterly component become more common, and as wind
speeds increase, so does the likelihood for E to NE winds. EC is the most com-
mon season for BET to receive strong winds. By contrast, winds at the interme-
diate locations of SAG and WKU show less directional preference, while winds
with a northerly component are quite rare at IMN, where the majority of winds