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

CF standard-name

units

bety

isimip

cruncep

narr

ameriflux

air_temperature

K

airT

tasAdjust

tair

air

TA (C)

air_temperature_max

K

tasmaxAdjust

NA

tmax

air_temperature_min

K

tasminAdjust

NA

tmin

air_pressure

Pa

air_pressure

PRESS (KPa)

mole_fraction_of_carbon_dioxide_in_air

mol/mol

CO2

moisture_content_of_soil_layer

kg m-2

soil_temperature

K

soilT

TS1 (NOT DONE)

relative_humidity

%

relative_humidity

rhurs

NA

rhum

RH

specific_humidity

1

specific_humidity

NA

qair

shum

CALC(RH)

water_vapor_saturation_deficit

Pa

VPD

VPD (NOT DONE)

surface_downwelling_longwave_flux_in_air

W m-2

same

rldsAdjust

lwdown

dlwrf

Rgl

surface_downwelling_shortwave_flux_in_air

W m-2

solar_radiation

rsdsAdjust

swdown

dswrf

Rg

surface_downwelling_photosynthetic_photon_flux_in_air

mol m-2 s-1

PAR

PAR (NOT DONE)

precipitation_flux

kg m-2 s-1

cccc

prAdjust

rain

acpc

PREC (mm/s)

degrees

wind_direction

WD

wind_speed

m/s

Wspd

WS

eastward_wind

m/s

eastward_wind

CALC(WS+WD)

northward_wind

m/s

northward_wind

CALC(WS+WD)

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