SCICHEM data for methane dispersion in the Permian Basin

This dataset contains the input (meteorological and terrain) and output data (raw concentration output, calculated methane columns) from SCICHEM used in the pre-print article "Using Frequent, High-Resolution Remote Sensing to Identify Intermittent and Overlapping CH4 sources in Oil and Gas Development Regions" to be submitted to Journal of Geophysical Research - Atmosphere.

The meteorological input data for SCICHEM (https://github.com/epri-dev/SCICHEM) is included in the zipped file "MET_INPUT.zip" and includes the files

METSCI2016.SFC - surface met file

METSCI2016.PRF - upper air met file

The terrain input data for SCICHEM is included in the file "TERRAIN_INPUT.zip" and includes the files

ter.inp - the input file for the SCICHEM preprocessor TERSCI. The references NED data can be downloaded from  http://www.mrlc.gov/viewerjs/ (seamless GeoTiff) or ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED (ArcGrid)

terrain.ter - the SCICHEM input file produced by TERSCI

*.out - log files produced by TERSCI

The raw output for the continuous methane source tests are in the file "continuous_rel_case.zip". This folder contains several comma separated value (CSV) files with the following columns

x - UTM east-west coordinates in m (corresponding to the projection used in the TERSCI terrain preprocessor)

y - UTM north-south coordinates in m

z - height above ground level (m)

c - enhanced methane concentration in µg m-3

t - time in the format YYYYMMDDHHMMSS

The raw output for the instantaneous methane source tests are in the file "instantaneous_rel_case.zip". This folder contains several comma separated value (CSV) files with the following columns

x - UTM east-west coordinates in m (corresponding to the projection used in the TERSCI terrain preprocessor)

y - UTM north-south coordinates in m

z - height above ground level (m)

c - enhanced methane concentration in µg m-3

t - time in the format YYYYMMDDHHMMSS

The processed columns for the continuous methane source tests are in the file "CALC_METHANE_COL_OUTPUT.zip", which contains two CSV files for the continuous and instantaneous releases with the following columns

x - UTM east-west coordinates in m

y - UTM north-south coordinates in m

t - time in the format YYYYMMDDHHMMSS

BG_mask - TRUE if location was used in background calculation for plume mask

tcol_g_m2_with_bg_and_no_noise - total (enhanced plus background) methane column (g m-2)

tcol_g_m2_with_bg_and_half_pct_noise - the total methane column with 0.5% Gaussian noise added (g m-2)

plume_mask - TRUE if region was tentatively identified as within the plume using the t-test

median_filt_mask - TRUE if region was tentatively identified as within the plume after the median filter was applied

final_filtered_plume - TRUE if region was identified as within the plume after all filters were applied