Trace Gas Flux Monitoring
Fluxes of atmospheric trace gases (CO2, N2O, and CH4) on the Main Cropping System Experiment.
Post 2000 data requires permission from the lead investigator before publication
The
standard data use policy applies to the this dataset
Context:
Trace gases (methane, carbon dioxide and nitrous oxide) have been measured on the LTER main experimental site since 1991 and on the successional and forested sites since 1993. The trace gas fluxes are analyzed twice monthly or monthly until the ground freezes. Samples are collected from permanently-installed in-situ static chambers. CH4 and N2O are analyzed using gas-chromatography and CO2 is measured with an infrared gas analyzer. Soil moisture and temperature are measured at the same time the gas samples are collected.
| Variate |
Description |
Units |
|
Sample Date
|
date of sampling
|
|
|
Treatment
|
treatment
|
|
|
Replicate
|
replicate
|
|
|
CH4 C
|
flux of methane (CH4)
|
g/ha/day
|
|
CO2 C
|
flux of carbon dioxide (CO2)
|
kg/ha/day
|
|
N2O N
|
flux of nitrous oxide (N2O)
|
g/ha/day
|
|
Year
|
sample year
|
|
Data Excerpt
|
Sample Date
|
Treatment
|
Replicate
|
Ch4 C
|
Co2 C
|
N2o N
|
Year
|
|
2011-05-13
|
TT1
|
RR2
|
-1.4
|
42
|
33.6
|
2011
|
|
2011-05-13
|
TT1
|
RR3
|
-0.9
|
19
|
6.9
|
2011
|
|
2011-05-13
|
TT1
|
RR1
|
-2.0
|
20
|
3.2
|
2011
|
|
2011-05-13
|
TT2
|
RR1
|
0.8
|
23
|
1.7
|
2011
|
|
2011-05-13
|
TT1
|
RR4
|
-1.1
|
33
|
6.9
|
2011
|
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