Ecological investigations of the tundra biome in the Prudhoe Bay region, Alaska ecologicalinvest00brow Year: 1975 31 (b) During the time when the strong west winds are most active there is little exposed sediment, so they move snow. When the north- east winds become more active the spring thaw exposes sediments in the dune area (east of T-1) and along the river channels. Also, the roads become sources of dust when they become snow-free during spring in direct proportion to the amount of traffic on them (see sequential photographs). Some comparisons of the amounts of dust on the east and west
Ecological investigations of the tundra biome in the Prudhoe Bay region, Alaska ecologicalinvest00brow Year: 1975 31 (b) During the time when the strong west winds are most active there is little exposed sediment, so they move snow. When the north- east winds become more active the spring thaw exposes sediments in the dune area (east of T-1) and along the river channels. Also, the roads become sources of dust when they become snow-free during spring in direct proportion to the amount of traffic on them (see sequential photographs). Some comparisons of the amounts of dust on the east and west sides of major roads are presented in Table 8, which is based on the data of Table 5. The electrical conductance of the meltwater obtained from the samples is also tabulated in Table 8. The conductance values were either measured at 25°C, or corrected to 25°C by the following relationship: '2 5 [1 + (25-T)] where C2 5 is the conductance at 25° C, Mc is the measured conductance at temperature T, and the conductivity cell constant is It was not possible to determine the varia- tion of the temperature coefficient for the water, and precision of 10 was considered adequate, so the single temperature coefficient of was used. This should '. . . be satisfac- tory for all natural waters' (Smith 1962). In the center part of the Prudhoe Bay area, especially along the main NW trending road, there is generally a significantly higher dust content on the west side of the road than on the east side. These are the simplest cases to inter- pret because the roads are clearly the dominant sources of dust. The dust distribution indicates that the east winds move the most dust. As we move to the eastern part of the area, especially along the road between the Prudhoe Bay airfield and the dock, we note that the west/east ratio becomes less than unity. It does not mean that the west winds are more effective dust movers in this region. Instead, it indicates that the dune area
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