PP Systems CIRAS-2 - Measuring Soil Respiration with CIRAS-2; Soil Respiration Measurement Display; Prompt; Parameters

Measuring Soil Respiration with CIRAS-2
CIRAS-2 Operator's Manual Version 2.04
- 127 -
Measuring Soil Respiration with CIRAS-2
The CIRAS-2 Measurement Screen is slightly different for Closed System Analysis (e.g. soil respiration
with SRC-1 chamber, canopy assimilation with our CPY-4 chamber). The following instructions and
corresponding settings assume use of PP Systems‟ SRC-1 soil respiration chamber. For more technical
information and details related to electrical and gas connections please refer to the SRC-1 Soil
Respiration System Operators Manual for CIRAS-2 ver. 4.03 or greater.
Soil Respiration Measurement Display
Prompt
Gives instructions to the user (i.e. flushing the cuvette, etc.) or displays the progress of calculations.
Parameters
Measurements associated with respiration measurement.
Cr
Starting CO
2
concentration (ppm)
dC
Change in CO
2
concentration (ppm) from start of measurement
Hr
Starting Humidity concentration (mb)
dH
Change in Humidity concentration (mb) from start of measurement
Q
PAR (µmol m
-2
s
-1
) (if sensor is also in use)
Tc
Temperature of the soil (
o
C)
P
Atmospheric Pressure (mb)
E
Not applicable
Sr
Soil Respiration Rate (g CO
2
m
-2
hour
-1
)
S
Time elapsed (seconds)
Prompt
Parameters
Settings