Table 8.
Data dictionary for the FunCaB ecosystem light measurement carbon fluxes (dataset vii).
| Variable name | Description | Variable type | Variable range or levels | Units | How measured |
|---|---|---|---|---|---|
| year | Year of sampling | numeric | 2015 – 2017 | yyyy | defined |
| date | Date of sampling | date | 2015-06-30 – 2017-08-01 | yyyy-mm-dd | defined |
| siteID | Unique site ID | categorical | Alrust – Vikesland | defined | |
| blockID | Unique block ID a combination of site and block | categorical | Alr1 – Vik5 | defined | |
| plotID | Unique plot ID is a combination of site, block and treatment | categorical | Alr1B – Vik5RTC | defined | |
| treatment | Plant functional groups removed, where F = forbs, G = graminoids, B = bryophytes, C = control, XC = extra control, RTC = VCG graminoid removal | categorical | FGB, FG, FB, GB, G, F, B, C, XC, RTC | defined | |
| starttime | Start time of light measurement (UTC + 2) | date_time | 2015-06-30 08:10:30 – 2017-08-01 14:17:10 | yyyy-mm-dd hh:mm:ss | recorded |
| stoptime | End time of light measurement (UTC + 2) | date_time | 2015-06-30 08:12:30 – 2017-08-01 14:19:10 | yyyy-mm-dd hh:mm:ss | recorded |
| PAR | PAR value of light measurement | numeric | 4.659 – 2555 | µmol m–2 s–1 | recorded |
| soiltemp | Soil temperature value of light measurement | numeric | 3 – 23.2 | °C | recorded |
| soilmoisture | Soil moisture measurement per plot | numeric | 0 – 76.775 | m3 water×m–3 soil×100 | recorded |
| tempK | Air temperature in the chamber during light measurement | numeric | 279.225 – 312.784 | Kelvin | recorded |
| vegHeight | Vegetation height | numeric | 0.01 – 27 | mm | measured |
| nee | Net ecosystem exchange | numeric | −15.392 – 17.885 | µmol m−2 s−1 | calculated |
| rsqd | R squared of slope of linear regression fitting the CO2 concentration versus time | numeric | 0 – 1 | calculated | |
| chamber | Carbon flux chamber | numeric | 1 – 2 | defined | |
| removal | Pre (2015) or post (>2015) removal treatment. Pre removal is related to the start of the experiment. | categorical | post – pre | defined | |
| weather | Weather conditions during data collection | categorical | cloud – Windy | recorded | |
| flag | Flag for data quality (x or DROP) | categorical | |||
| comment | Comment on measurement | categorical | |||
| time | Time in seconds for light measurement | numeric | 0 – 195 | second | recorded |
Data dictionary with column descriptions for dataset vii – the ecosystem light measurement carbon fluxes from 384 25 × 25 cm experimental plant functional group removal plots from 2015 – 2017, and in 48 extra controls in 2016, at twelve sites in the Vestland Climate Grid, Vestland County, Norway. Note that the dataset also contains additional measurements from another graminoid removal experiment in the VCD and the corresponding dark measurements for each plot and measurement time (Table 9).