Figure 6
From: Advancing Investigation and Physical Modeling of First-Order Fire Effects on Soils
Time course of half-hourly soil CO2 at 0.05 m and 0.15 m depths and at two locations (center and near the edge) under a slash pile during the April 2004 experimental burn at Manitou Experimental Forest. These data were obtained from a 30 s sampling period every half hour from a flow of soil CO2 drawn through a tube and into an infrared gas analyzer (LiCor 820; Lincoln, Nebraska, USA) using a pump downstream of the analyzer. The maximum concentration that the instrument can measure is 20 000 ppm, which was exceeded in less than 30 min after the fire was initiated. These data appear on the graphs as horizontal lines (approximately) between days 117.4 and 119.