http://www.arl.noaa.gov/Project_Sagebrush.php

ARL's Field Research Division (FRD) has planned a series of atmospheric tracer studies to revisit older studies, conducted in the 1950s and 1960s, on short-range dispersion in open terrain. The new studies, called Project Sagebrush, began September 30, 2013 and will extend over several years. FRD will use its modern meteorological instrumentation and tracer technology, which were not available during the older dispersion studies. Project Sagebrush will take place at FRD's tracer release facility, located on the Department of Energy's Idaho National Laboratory (INL). Results will provide a modern set of tracer data, along with high quality measurements collected from an extensive set of sensors in the boundary layer (the mixed layer of the atmosphere closest to and most influenced by the Earth's surface). The results will be highly useful to the dispersion research community both for understanding short-range dispersion in open terrain and for developing, improving, and testing dispersion models. Partners include the Washington State University and the University of Tennessee Space Institute.

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Sagebrush Release #5

Meteorology:	WRF at 1 km every 5 min

Tracer:		SF6 = 146 g/M

Release:	3708 g/h for 2.5 h

Measurements:	ppt = 1 L / 1E+12 L
		(ppt 1E-12) = L/L

Conversion:

	(g/m3) 	= (L/L) (146 g/M) (44.6 M/m3)
		= (ppt 1.0E-12) (146*44.6)
		= 6.5 E-9 ppt

	ppt	= 1.53572 E+8 g/m3


When ICHEM=6 

	(g/g -> ppt) = 29/146 * 1.0E+09 = 1.986E+08


