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Increased Wind Erosion from Forest Wildfire: Implications for Contaminant-Related Risks

^a Los Alamos National Laboratory, Health Physics Measurements Group, Mail Stop J573, Los Alamos, NM 87545
^b Colorado State University, Department of Environmental and Radiological Health Sciences, 1618 Campus Delivery, Ft. Collins, CO 80523
^c University of Arizona, School of Natural Resources and Institute for the Study of Planet Earth and Department of Ecology and Evolutionary Biology, Biological Sciences East 325, P.O. Box 210043, Tucson, AZ 85721-0043

View larger version (17K): [in a new window]   Fig. 1. Location of sampling plots relative to New Mexico, USA, and New Mexico State Highway 501, which borders the west side of Los Alamos National Laboratory. The burn gradient is represented as variously shaded boxes. Within each burn category, the primary sampling sites are represented as larger rectangles and secondary sites represented as smaller rectangles. The map also shows the locations of the TA-6 meteorological tower and the sites used to establish relationships between HDF (horizontal dust flux) and VDF (vertical dust flux).

View larger version (19K): [in a new window]   Fig. 2. Mean HDF (horizontal dust flux) at 1-m sampling heights categorized by burn type.

View larger version (12K): [in a new window]   Fig. 3. Mean and 1 standard error for (a) HDF (horizontal dust flux) categorized by sampling heights and averaged across all sampling periods and (b) HDFs that were averaged across dry sampling periods with precipitation <1.3 mm.

View larger version (24K): [in a new window]   Fig. 4. The means of the horizontal dust flux as a function of precipitation (Column a) and wind velocity (Column b). The relationships are plotted individually for sampling heights of 25, 50, and 100 cm.

View larger version (10K): [in a new window]   Fig. 5. Relationship between the VDF (vertical dust flux) measurements and the HDF (horizontal dust flux) measured at the TA-6 meteorological station. The regression equation is VDF = 0.02 + 0.05(HDF), R2 = 0.37.