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Environmental conditions

Environment conditions data is collected using the Vaisala CO2, Thies Clima weather sensors as well as lightning, irrigation, and weather data collected at the Maricopa site.

Data formats follow the Climate and Forecast (CF) conventions for variable names and units. Environmental data are stored in the Geostreams database.

Data sources

WeatherStation coordinates are 33.074457 N, 111.975163 W
EnvironmentLogger is on top of the gantry system and is moveable.
Irrigation is managed at the field level. There are four regions that can be irrigated at different rates.

Data access

Level 1 data

Level 1 meteorological data is aggregated to from 1 Hz raw data to 5 minute averages or sums.

netCDF: 5s (12 per minute) observations

On Globus or Workbench you can find these data provided in both hourly and daily files. These files contain data at the original temporal resolution of 1/s. In addition, they contain the high resolution spectral radiometer data.

sites/ua-mac/Level_1/envlog_netcdf

hourly files: YYYY-MM-DD_HH-MM-SS_environmentallogger.nc
daily files: envlog_netcdf_L1_ua-mac_YYYY-MM-DD.nc

Geostreams: 5 minute observations

Data can be accessed using the geostreams API or the PEcAn meteorological workflow. These are illustrated in the sensor data tutorials.

Here is the json representation of a single five-minute observation:

Data can be accessed using the geostreams API or the PEcAn meteorological workflow.

These are illustrated in the sensor data tutorials.

Here is the json representation of a single five-minute observation from Geostreams:

[
   {
      "geometry":{
         "type":"Point",
         "coordinates":[
            33.0745666667,
            -111.9750833333,
            0
         ]
      },
      "start_time":"2016-08-30T00:06:24-07:00",
      "type":"Feature",
      "end_time":"2016-08-30T00:10:00-07:00",
      "properties":{
         "precipitation_rate":0.0,
         "wind_speed":1.6207870370370374,
         "surface_downwelling_shortwave_flux_in_air":0.0,
         "northward_wind":0.07488770951583902,
         "relative_humidity":26.18560185185185,
         "air_temperature":300.17606481481516,
         "eastward_wind":1.571286062845733,
         "surface_downwelling_photosynthetic_photon_flux_in_air":0.0
      }
   },

Variable names and units

Raw Data

Data is available via Globus or Workbench:

/ua-mac/raw_data/co2sensor
/ua-mac/raw_data/EnvironmentLogger
/ua-mac/raw_data/irrigation
/ua-mac/raw_data/lightning
/ua-mac/raw_data/weather

Sensor information:

Computational pipeline

Environmental Logger

Description: EnvironmentalLogger raw files are converted to netCDF.

Known Issues

Known issue: the irrigation data stream does not currently handle variable irrigation rates within the field. Specifically, we have not yet accounted for the Summer 2017 drought experiments. See terraref/reference-data#196 for more information.

When the full field is irrigated (as is typical), the irrigated area is 5466.1 m2 (=215.2 m x 25.4 m)

In 2017:

Full field irrigated area from the start of the season to August 1 (103 dap) is 5466.1 m2 (=215.2 m x 25.4 m).
Well-watered treatment zones from August 1 to 15 (103 to 116 dap): 2513.5 m2 (=215.2 m x 11.68 m) in total, combined areas of non-contiguous blocks
Well-watered treatment zones from August 15 - 30 (116 to 131 dap): 3169.9 m2 (=215.2 m x 14.73 m), again in total as the combined areas of non-contiguous blocks

Github Issues