Work Description

Readme for: "Aircraft Data (2021) for Measurement of Agriculture Illuminating farm-Zone Emissions of N2O (MAIZE)"

Authors: Dr. E.A. Kort (https://orcid.org/0000-0003-4940-7541), Dr. Genevieve Plant (https://orcid.org/0000-0003-1973-8243), Dr. Natasha Dacic (https://orcid.org/0000-0001-5088-1297)

For questions or information, contact the PI Dr. E. A. Kort at eakort@umich.edu

Each flight's data from the MAIZE 2021 campaign is provided in a separate file.

Description: As part of the Measurement of Agriculture Illuminating farm-Zone Emissions of N2O (MAIZE) project, in 2021 the aircraft platform sampled the agriculture regions of Nebraska and Iowa. Vertical profiles were conducted on each flight to capture the vertical structure and mixing depths of the atmosphere. The data files contains the merged data for each individual file day.

Methodology: Data collected by Mooney aircraft in 2021 in the agriculture regions of Nebraska and Iowa. Measurements of nitrous oxide (N2O), carbon monoxide (CO), carbon dioxide (CO2), and water vapor (H2O) were made using an Aerodyne Research, Inc. TILDAS Compact Single Laser N2O Analyzer at a frequency of 1Hz. Further details are provided in Gvakharia et al. (2018). Ozone (O3) was collected by the 2B 205 Dual Beam Ozone Monitor using two detection cells to simultaneously measure ozone scrubbed and non-scrubbed air. Samples were made at a frequency of 0.5 Hz with an average precision and accuracy of 1 ppb. GPS antennae, mounted on the Mooney aircraft, recorded latitude, longitude, altitude, aircraft heading, zonal speed, and meridional speed. Horizontal winds are calculated following Conley et al (2014). Temperature (C) and humidity (%) were collected with the Vaisala HMP60 probe. Aircraft speeds averaged around 70 meters per second. Gvakharia A, Kort EA, Smith M, Conley S, (2018) Testing and evaluation of a new airborne system for continuous N2O, CO2, CO, and H2O measurements: the Frequent Calibration High-performance Airborne Observation System (FCHAOS), Atmos. Meas. Tech. 11, 6059-6074, https://doi.org/10.5194/amt-11-6059-2018 Conley S, Faloona I.C, Lenschow D.H, Karion A, Sweeney S, (2014) A low-cost system for measuring horizontal winds from single-engine aircraft, Journal of Atmospheric and Oceanic Technology, 31(6), 1312-1320, https://doi.org/10.1175/JTECH-D-13-00143.1

Column names:

epoch_time
an2o_ppb
aco_ppb
aco2_ppm
ah2o_per
Uspeed_m_s
Vspeed_m_s
avipress_mb
tas_kts
avialt_ft
oat_K
lat_deg
lon_deg
gpsalt_msl
Zspeed_m_s
Mspeed_m_s
gpstime
gpsheading_deg
pitch_deg
roll_deg
o3_ppb
ozcell_t_C
ozcell_p_mb
ozflow_cc_min
T_C
RH_per

Column descriptions:

epoch_time: Time (EPOCH, seconds since midnight, January 1, 1970)
an2o_ppb: Aerodyne N2O concentration in parts per billion
aco_ppb: Aerodyne CO concentration in parts per billion
aco2_ppm: Aerodyne CO2 concentration in parts per billion
ah2o_per: Aerodyne H2O concentration in percent
Uspeed_m_s: wind speed in U direction (eastward), m/s
Vspeed_m_s: wind speed in V direction (northward), m/s
avipress_mb: pressure in mb
tas_kts: true air speed in knots
avialt_ft: altitude in feet
oat_K: outside air temperature in Kelvin
lat_deg: latitude in degrees
lon_deg: longitude in degrees
gpsalt_msl: gps altitude reading in meters above mean sea level
Zspeed_m_s: zonal speed in m/s
Mspeed_m_s: meridional speed m/s
gpstime: gps epoch time
gpsheading_deg: gps heading in degrees
pitch_deg: gps pitch in degrees
roll_deg: gps roll in degress
o3_ppb: ozone concentration in parts per billion
ozcell_t_C: ozone cell temperature in Celsius
ozcell_p_mb: ozone cell pressure in mb
ozflow_cc_min: ozone cell flow rate in cc/min
T_C: temperature in Celsius
RH_per: relative humidity in percent

Data Notes:
1) Missing Value indicator = NA

2) Ozone data is not calibrated or reviewed for quality.

3) In-flight calibration of the Aerodyne instrument using the FCHAOS approach.
Details in: Gvakharia A, Kort EA, Smith M, Conley S, Testing and evaluation of a new airborne system
for continuous N2O, CO2, CO, and H2O measurements: the Frequent Calibration High-performance Airborne
Observation System (FCHAOS), Atmos. Meas. Tech. 11, 6059-6074, https://doi.org/10.5194/amt-11-6059-2018, 2018

Citation for this dataset:
Kort, E. A., Plant, G., Dacic, N. Aircraft Data (2021) for Measurement of Agriculture Illuminating farm-Zone Emissions of N2O (MAIZE) [Data set], University of Michigan - Deep Blue Data. https://doi.org/10.7302/0jvh-0c91