Equipment and Calibration
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History
| Rec No. | Date | Loc From | Title | Loc To | Notes |
|---|---|---|---|---|---|
| 6804 | 2024-08-05 | Lab none | Tested | Lab none | This chamber is reading low CO2 values ~200 and trying to reset it with a performance check seems to fail. |
| 6478 | 2023-11-13 | Tonzi-SoilCO2 Forced Diffusion Open | Removed | Lab none | Removed because CO2 readings seem to be too low. We tried a performance check but missed being able to reset the offset. Brought to the lab for testing. The fluxes were zero. |
| 5924 | 2022-04-27 | Lab none | Installed | Tonzi-SoilCO2 Forced Diffusion Open | Reinstalled at Tree 1 after testing in the lab. I had removed it because I thought it was broken but it might have been reading funny because it was lying on its side. It seemed okay in the lab. I installed it in a slightly different location with more litter on the soil surface. |
| 5786 | 2022-04-12 | Tonzi-SoilCO2 Forced Diffusion Tree 1 | Removed | Lab none | Removed from Tonzi Tree 1 for testing. Identical CO2 readings (zero flux). Chamber was on its side which would cause this symptom - brought in for testing. |
| 5404 | 2021-07-29 | Tonzi-SoilCO2 Forced Diffusion Tree 1 | Maintenance | Tonzi-SoilCO2 Forced Diffusion Tree 1 | I unfastened this chamber and laid it on its side for a performance check. Average Flux: 0.0, 0.04 STDEV Average ATM: 242.5ppm, 51.9C Average Soil: 243.0ppm, 51.7C I reset the baseline CO2 concentration to 400ppm. This chamber does not have a sun shield and even though it was in the shade under the trees its temperatures were very high. |
| 4933 | 2020-10-22 | Lab none | Installed | Tonzi-SoilCO2 Forced Diffusion Tree 1 | Installed at the under tree location at Tonzi to replace sn FD20180068 which has been reading zero CO2 concentration. |
| 4829 | 2020-10-05 | Bouldin Alfalfa Forced Diffusion A | Removed | Lab none | Removed from Bouldin Alfalfa to check on it's low CO2 concentration readings. Replaced by sn FD20180047 |
| 4775 | 2020-09-23 | Bouldin Corn Forced Diffusion B | Moved | Bouldin Alfalfa Forced Diffusion A | Moved from BC to BA to replace sn FD20160001, which was brought back to the lab for testing |
| 4796 | 2020-09-01 | Bouldin Corn Forced Diffusion B | Moved | Bouldin Corn Forced Diffusion B | Moved tower and soil sensors back from field in preparation for corn harvest. Chambers were reinstalled under the tower. |
| 4512 | 2020-05-29 | Lab none | Installed | Bouldin Corn Forced Diffusion B | Reinstalled in normal density corn just in front of tower |
| 4422 | 2020-04-17 | Bouldin Corn Forced Diffusion B | Removed | Lab none | Removed from BC and brought back to the lab because there will be tractor work on the field soon. |
| 4324 | 2020-01-07 | Lab none | Installed | Bouldin Corn Forced Diffusion B | Reinstalled at Bouldin Corn after being removed when the field was flooded. Installed near previous location on 12 inch collars. |
| 4733 | 2019-12-20 | Bouldin Corn Forced Diffusion B | Removed | Lab none | Removed from the field by Tyler due to being partially submerged by winter flooding. |
| 4730 | 2019-11-14 | Lab none | Installed | Bouldin Corn Forced Diffusion B | Installed in the corn field near Tyler's southern soil gas ports |