Using Open-Path Dual-Comb Spectroscopy To Monitor Methane Emissions From Simulated Grazing Cattle by US Government | Environmental and Climate Sciences

About this Dataset

Using Open-Path Dual-Comb Spectroscopy To Monitor Methane Emissions From Simulated Grazing Cattle

Data published in the paper "Using Open-Path Dual-Comb Spectroscopy to Monitor Methane Emissions from Simulated Grazing Cattle". A controlled methane release experiment was performed to determine if dual comb spectroscopy (DCS) can detect methane concentration enhancements above the atmospheric background produced by a typical herd of beef cattle in an extensive grazing system. Open-path DCS was used to measure downwind and upwind methane concentrations from ten point-sources of methane simulating cattle. The assets include all data taken during the field campaign, calculated methane flux, and data explicitly plotted in the paper figures.
Organization: National Institute of Standards and Technology
Last updated: 2024-05-15T10:39:02.225654
Tags: agriculture, atmospheric-measurements

Tables

All DCS Data

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.all_dcs_data

1.22 MB
35184 rows
39 columns


CREATE TABLE all_dcs_data (
  "dtobj" TIMESTAMP,
  "time_stamp" BIGINT,
  "date" TIMESTAMP,
  "tod" VARCHAR,
  "doy" DOUBLE,
  "igm_time" DOUBLE,
  "tshasdata" DOUBLE,
  "igms_per_pc" DOUBLE,
  "ch0_p2p" DOUBLE,
  "ch0_reduced_chi2" DOUBLE,
  "ch0_h2o_molefraction" DOUBLE,
  "ch0_h2o_molefraction_err" DOUBLE,
  "ch0_co2_molefraction" DOUBLE,
  "ch0_co2_molefraction_err" DOUBLE,
  "ch0_ch4_molefraction" DOUBLE,
  "ch0_ch4_molefraction_err" DOUBLE,
  "ch0_t_k" DOUBLE,
  "ch0_t_k_err" DOUBLE,
  "ch0_p_mbar" DOUBLE,
  "ch0_p_mbar_err" DOUBLE,
  "ch1_p2p" DOUBLE,
  "ch1_reduced_chi2" DOUBLE,
  "ch1_h2o_molefraction" DOUBLE,
  "ch1_h2o_molefraction_err" DOUBLE,
  "ch1_co2_molefraction" DOUBLE,
  "ch1_co2_molefraction_err" DOUBLE,
  "ch1_ch4_molefraction" DOUBLE,
  "ch1_ch4_molefraction_err" DOUBLE,
  "ch1_t_k" DOUBLE,
  "ch1_t_k_err" DOUBLE,
  "ch1_p_mbar" DOUBLE,
  "ch1_p_mbar_err" DOUBLE,
  "igms_per_pc1" DOUBLE,
  "igms_quality" DOUBLE,
  "igms_quality1" DOUBLE,
  "snr" DOUBLE,
  "snr1" DOUBLE,
  "ch0_path_cm" DOUBLE,
  "ch1_path_cm" DOUBLE
);

AllInput 15min Synchronized Release

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.allinput_15min_synchronized_release

1.41 MB
9943 rows
29 columns


CREATE TABLE allinput_15min_synchronized_release (
  "dtobj" TIMESTAMP,
  "date" VARCHAR,
  "time" VARCHAR,
  "doy" DOUBLE,
  "sonic_temperature" DOUBLE,
  "air_temperature" DOUBLE,
  "air_pressure" DOUBLE,
  "u_unrot" DOUBLE,
  "v_unrot" DOUBLE,
  "w_unrot" DOUBLE,
  "u_rot" DOUBLE,
  "v_rot" DOUBLE,
  "w_rot" DOUBLE,
  "wind_speed" DOUBLE,
  "wind_dir" DOUBLE,
  "u" DOUBLE,
  "l" DOUBLE,
  "u_var" DOUBLE,
  "v_var" DOUBLE,
  "w_var" DOUBLE,
  "ts_var" DOUBLE,
  "cov_u_v" DOUBLE,
  "cov_u_w" DOUBLE,
  "cov_u_ts" DOUBLE,
  "cov_v_w" DOUBLE,
  "cov_v_ts" DOUBLE,
  "cov_w_ts" DOUBLE,
  "n_ch4dry" DOUBLE,
  "s_ch4dry" DOUBLE
);

Data File: Figure1 IGM

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.data_file_figure1_igm

42.57 MB
957418 rows
5 columns


CREATE TABLE data_file_figure1_igm (
  "unnamed_0" BIGINT,
  "time_ps" DOUBLE,
  "wavenumber_cm_1" DOUBLE,
  "igm" DOUBLE,
  "spectrum" DOUBLE
);

Figure4a AllanWerleData

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.figure4a_allanwerledata

8 KB
46 rows
7 columns


CREATE TABLE figure4a_allanwerledata (
  "unnamed_0_1" BIGINT,
  "unnamed_0" BIGINT,
  "tau" DOUBLE,
  "ch0_ch4_oadev" DOUBLE,
  "ch0_ch4_oadev_err" DOUBLE,
  "ch1_ch4_oadev" DOUBLE,
  "ch1_ch4_oadev_err" DOUBLE
);

Table 5

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.table_5

528.11 KB
11980 rows
5 columns


CREATE TABLE table_5 (
  "unnamed_0" BIGINT,
  "wavenumber_cm_1" DOUBLE,
  "data" DOUBLE,
  "fit" DOUBLE,
  "residual" DOUBLE
);

Figure5 InitialRelease

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.figure5_initialrelease

18.23 KB
288 rows
6 columns


CREATE TABLE figure5_initialrelease (
  "dtobj" TIMESTAMP,
  "windspeed" DOUBLE,
  "winddirection" DOUBLE,
  "rch4_northbeamline" DOUBLE,
  "rch4_southbeamline" DOUBLE,
  "ch4_enhancement" DOUBLE
);

Figure6 StepRelease

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.figure6_steprelease

10.22 KB
32 rows
10 columns


CREATE TABLE figure6_steprelease (
  "dtobj" TIMESTAMP,
  "u" DOUBLE,
  "winddirection" DOUBLE,
  "rch4_northbeamline" DOUBLE,
  "rch4_southbeamline" DOUBLE,
  "snr_northbeamline" DOUBLE,
  "snr_southbeamline" DOUBLE,
  "idmflux" DOUBLE,
  "idmfluxerror" DOUBLE,
  "releaseflux" DOUBLE
);

Figure7 NoRelease

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.figure7_norelease

7.89 KB
25 rows
8 columns


CREATE TABLE figure7_norelease (
  "dtobj" TIMESTAMP,
  "u" DOUBLE,
  "winddirection" DOUBLE,
  "rch4_northbeamline" DOUBLE,
  "rch4_southbeamline" DOUBLE,
  "idmflux" DOUBLE,
  "idmfluxerror" DOUBLE,
  "releaseflux" DOUBLE
);

Figure8 ToggleRelease

@usgov.national_institute_of_standard_using_open_path_dual_co_1c7589a8.figure8_togglerelease

12.91 KB
33 rows
13 columns


CREATE TABLE figure8_togglerelease (
  "dtobj" TIMESTAMP,
  "u" DOUBLE,
  "winddirection" DOUBLE,
  "rch4_northbeamline" DOUBLE,
  "rch4_southbeamline1" DOUBLE,
  "rch4_southbeamline2" DOUBLE,
  "snr_northbeamline" DOUBLE,
  "snr_southbeamline1" DOUBLE,
  "snr_southbeamline2" DOUBLE,
  "idmflux_southbeamline1" DOUBLE,
  "idmflux_southbeamline2" DOUBLE,
  "idmfluxerror" DOUBLE,
  "releaseflux" DOUBLE
);