Abstract:

This dataset contains the hindcast predictions of the nearfield (vertical rising) plume and surface boil of the Ixtoc I accident for the duration of the spill event (June 1979 to March 1980). Model results are computed using an integral model of the Texas A&M Oilspill Calculator (TAMOC). The model accounts for both stratification and crossflow, and these results are for the Bent Plume Module of TAMOC. Boundary conditions include conductivity, temperature, and depth (CTD) profiles and currents estimated from historical data.

Suggested Citation:

Socolofsky, Scott; Gros, Jonas. 2018. Nearfield Plume Hindcast of the Ixtoc I blowout in the Bay of Campeche from June 1979 to March 1980 using the Texas A&M Oilspill Calculator. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7QN654M

Purpose:

These data provide initial conditions to farfield models (e.g., the Connectivity Modeling System, CMS, or the Lagrangian TRANSport model, LTRANS). These data are also important to specify the initial conditions of the surface boil and to help interpret chemistry measurements made during the Ixtoc I accident and during cruises of the C-IMAGE II project.

Data Parameters and Units:

The model tracks the evolving composition and state of the bubbles and droplets that were released from the wellhead and the composition and state of the seawater entrained into the vertical rising plume. The simulation extends through the nearfield to the end of the buoyancy-dominated region of the surface boil. The directory contains the subfolders: src: the complete TAMOC source code. The TAMOC codes are also available and maintained at https://github.com/socolofs/tamoc/ ./input/ - input files (python codes) to launch the simulations with the Texas A&M oil spill (outfall) calculator (TAMOC). Simulations were performed with and without the "Sombrero", the collection device used in the vicinity of the leaking well. ./output/ - when running the files in the ".input" folder, all output files will be written here. This folder contains two subfolders providing output files for the case with the "Sombrero" (./output/with_sombrero/) and without the "Sombrero" (./output/without_sombrero/). The output in each folder consists in (1) a figure showing the predicted bubble and droplet initial size distributions using the Wang equation for gas bubbles and the SINTEF correlation for oil droplets. PNG file with 2 frequency plots: gas bubble diameter (mm) vs. gas mass flow rate (kg/s) and oil droplet diameter vs. oil mass flow rare (kg/s); (2) the assumed water column CTD profile used for these simulations with time (time; seconds since 1970-01-01 00:00:00 0:00), latitude (lat, decimal degrees N), longitude (lon, decimal degrees E), depth (z, m), temperature (K), salinity (psu), pressure (Pa), wind above the anemometer height (ua, m/s), See below ncdump information for the netCDF file (3) a complete TAMOC output file (text files): the 207 variables saved (such as depth, time, etc.) are described in the file containing "header" in its name, whereas the second file contains the actual data. Header and units included below. NETCDF file ncdump information: netcdf IXTOC_blowout_profile { dimensions: z = UNLIMITED ; // (3 currently) profile = 1 ; variables: double time(profile) ; time:long_name = "Time profile was collected" ; time:standard_name = "time" ; time:units = "seconds since 1970-01-01 00:00:00 0:00" ; time:calendar = "julian" ; time:axis = "T" ; double lat(profile) ; lat:long_name = "Latitude of the profile location" ; lat:standard_name = "latitude" ; lat:units = "degrees_north" ; lat:axis = "Y" ; double lon(profile) ; lon:long_name = "Longitude of the profile location" ; lon:standard_name = "longitude" ; lon:units = "degrees_east" ; lon:axis = "X" ; double z(z) ; z:long_name = "depth below the water surface" ; z:standard_name = "depth" ; z:units = "m" ; z:axis = "Z" ; z:positive = "down" ; z:comment = "synthetic" ; z:valid_min = 0. ; z:valid_max = 51.5 ; double temperature(z) ; temperature:long_name = "Absolute temperature" ; temperature:standard_name = "temperature" ; temperature:units = "K" ; temperature:coordinates = "time lat lon z" ; temperature:comment = "synthetic" ; double salinity(z) ; salinity:long_name = "Practical salinity" ; salinity:standard_name = "salinity" ; salinity:units = "psu" ; salinity:coordinates = "time lat lon z" ; salinity:comment = "synthetic" ; double pressure(z) ; pressure:long_name = "pressure" ; pressure:standard_name = "pressure" ; pressure:units = "Pa" ; pressure:coordinates = "time lat lon z" ; pressure:comment = "computed" ; double ua(z) ; ua:long_name = "Ua" ; ua:standard_name = "ua" ; ua:units = "m/s" ; ua:coordinates = "time lat lon z" ; ua:comment = "measured" ; // global attributes: :Conventions = "TAMOC Modeling Suite Output File" ; :Metadata_Conventions = "TAMOC Python Model" ; :featureType = "profile" ; :cdm_data_type = "Profile" ; :nodc_template_version = "NODC_NetCDF_Profile_Orthogonal_Template_v1.0" ; :title = "Profile created by TAMOC.ambient for use in the TAMOC modeling suite" ; :summary = "Based on indications in a report by Farrington" ; :source = "Synthetic data for assumed constant profile" ; :creator_url = "http://github.com/socolofs/tamoc" ; :date_created = "2018-01-30 14:50:34.088806" ; :date_modified = "2018-01-30 14:50:34.088940" ; :history = "Creation" ; :sea_name = "None" ; Text file output column number description and units: 0: time (s) 1: mass (kg) 2: salinity (psu) 3: heat (J) 4: x-direction momentum (kg m/s) 5: y-direction momentum (kg m/s) 6: z-direction momentum (kg m/s) 7: relative thickness h/V (s) 8: x-coordinate (m) 9: y-coordinate (m) 10: z-coordinate (m) 11: distance along plume centerline (m) 12: Total mass flux of inert in particle 0 (kg/s) 13: Total heat flux of particle 0 (J/s) 14: Time since release of particle 0 (s) 15: Lambda coordinate of particle 0 (m) 16: Eta coordinate of particle 0 (m) 17: Csi coordinate of particle 0 (m) 18: Total mass flux of inert in particle 1 (kg/s) 19: Total heat flux of particle 1 (J/s) 20: Time since release of particle 1 (s) 21: Lambda coordinate of particle 1 (m) 22: Eta coordinate of particle 1 (m) 23: Csi coordinate of particle 1 (m) 24: Total mass flux of inert in particle 2 (kg/s) 25: Total heat flux of particle 2 (J/s) 26: Time since release of particle 2 (s) 27: Lambda coordinate of particle 2 (m) 28: Eta coordinate of particle 2 (m) 29: Csi coordinate of particle 2 (m) 30: Total mass flux of inert in particle 3 (kg/s) 31: Total heat flux of particle 3 (J/s) 32: Time since release of particle 3 (s) 33: Lambda coordinate of particle 3 (m) 34: Eta coordinate of particle 3 (m) 35: Csi coordinate of particle 3 (m) 36: Total mass flux of inert in particle 4 (kg/s) 37: Total heat flux of particle 4 (J/s) 38: Time since release of particle 4 (s) 39: Lambda coordinate of particle 4 (m) 40: Eta coordinate of particle 4 (m) 41: Csi coordinate of particle 4 (m) 42: Total mass flux of inert in particle 5 (kg/s) 43: Total heat flux of particle 5 (J/s) 44: Time since release of particle 5 (s) 45: Lambda coordinate of particle 5 (m) 46: Eta coordinate of particle 5 (m) 47: Csi coordinate of particle 5 (m) 48: Total mass flux of inert in particle 6 (kg/s) 49: Total heat flux of particle 6 (J/s) 50: Time since release of particle 6 (s) 51: Lambda coordinate of particle 6 (m) 52: Eta coordinate of particle 6 (m) 53: Csi coordinate of particle 6 (m) 54: Total mass flux of inert in particle 7 (kg/s) 55: Total heat flux of particle 7 (J/s) 56: Time since release of particle 7 (s) 57: Lambda coordinate of particle 7 (m) 58: Eta coordinate of particle 7 (m) 59: Csi coordinate of particle 7 (m) 60: Total mass flux of inert in particle 8 (kg/s) 61: Total heat flux of particle 8 (J/s) 62: Time since release of particle 8 (s) 63: Lambda coordinate of particle 8 (m) 64: Eta coordinate of particle 8 (m) 65: Csi coordinate of particle 8 (m) 66: Total mass flux of inert in particle 9 (kg/s) 67: Total heat flux of particle 9 (J/s) 68: Time since release of particle 9 (s) 69: Lambda coordinate of particle 9 (m) 70: Eta coordinate of particle 9 (m) 71: Csi coordinate of particle 9 (m) 72: Total mass flux of carbon_dioxide in particle 10 (kg/s) 73: Total mass flux of nitrogen in particle 10 (kg/s) 74: Total mass flux of methane in particle 10 (kg/s) 75: Total mass flux of ethane in particle 10 (kg/s) 76: Total mass flux of propane in particle 10 (kg/s) 77: Total mass flux of isobutane in particle 10 (kg/s) 78: Total mass flux of n-butane in particle 10 (kg/s) 79: Total mass flux of isopentane in particle 10 (kg/s) 80: Total mass flux of n-pentane in particle 10 (kg/s) 81: Total heat flux of particle 10 (J/s) 82: Time since release of particle 10 (s) 83: Lambda coordinate of particle 10 (m) 84: Eta coordinate of particle 10 (m) 85: Csi coordinate of particle 10 (m) 86: Total mass flux of carbon_dioxide in particle 11 (kg/s) 87: Total mass flux of nitrogen in particle 11 (kg/s) 88: Total mass flux of methane in particle 11 (kg/s) 89: Total mass flux of ethane in particle 11 (kg/s) 90: Total mass flux of propane in particle 11 (kg/s) 91: Total mass flux of isobutane in particle 11 (kg/s) 92: Total mass flux of n-butane in particle 11 (kg/s) 93: Total mass flux of isopentane in particle 11 (kg/s) 94: Total mass flux of n-pentane in particle 11 (kg/s) 95: Total heat flux of particle 11 (J/s) 96: Time since release of particle 11 (s) 97: Lambda coordinate of particle 11 (m) 98: Eta coordinate of particle 11 (m) 99: Csi coordinate of particle 11 (m) 100: Total mass flux of carbon_dioxide in particle 12 (kg/s) 101: Total mass flux of nitrogen in particle 12 (kg/s) 102: Total mass flux of methane in particle 12 (kg/s) 103: Total mass flux of ethane in particle 12 (kg/s) 104: Total mass flux of propane in particle 12 (kg/s) 105: Total mass flux of isobutane in particle 12 (kg/s) 106: Total mass flux of n-butane in particle 12 (kg/s) 107: Total mass flux of isopentane in particle 12 (kg/s) 108: Total mass flux of n-pentane in particle 12 (kg/s) 109: Total heat flux of particle 12 (J/s) 110: Time since release of particle 12 (s) 111: Lambda coordinate of particle 12 (m) 112: Eta coordinate of particle 12 (m) 113: Csi coordinate of particle 12 (m) 114: Total mass flux of carbon_dioxide in particle 13 (kg/s) 115: Total mass flux of nitrogen in particle 13 (kg/s) 116: Total mass flux of methane in particle 13 (kg/s) 117: Total mass flux of ethane in particle 13 (kg/s) 118: Total mass flux of propane in particle 13 (kg/s) 119: Total mass flux of isobutane in particle 13 (kg/s) 120: Total mass flux of n-butane in particle 13 (kg/s) 121: Total mass flux of isopentane in particle 13 (kg/s) 122: Total mass flux of n-pentane in particle 13 (kg/s) 123: Total heat flux of particle 13 (J/s) 124: Time since release of particle 13 (s) 125: Lambda coordinate of particle 13 (m) 126: Eta coordinate of particle 13 (m) 127: Csi coordinate of particle 13 (m) 128: Total mass flux of carbon_dioxide in particle 14 (kg/s) 129: Total mass flux of nitrogen in particle 14 (kg/s) 130: Total mass flux of methane in particle 14 (kg/s) 131: Total mass flux of ethane in particle 14 (kg/s) 132: Total mass flux of propane in particle 14 (kg/s) 133: Total mass flux of isobutane in particle 14 (kg/s) 134: Total mass flux of n-butane in particle 14 (kg/s) 135: Total mass flux of isopentane in particle 14 (kg/s) 136: Total mass flux of n-pentane in particle 14 (kg/s) 137: Total heat flux of particle 14 (J/s) 138: Time since release of particle 14 (s) 139: Lambda coordinate of particle 14 (m) 140: Eta coordinate of particle 14 (m) 141: Csi coordinate of particle 14 (m) 142: Total mass flux of carbon_dioxide in particle 15 (kg/s) 143: Total mass flux of nitrogen in particle 15 (kg/s) 144: Total mass flux of methane in particle 15 (kg/s) 145: Total mass flux of ethane in particle 15 (kg/s) 146: Total mass flux of propane in particle 15 (kg/s) 147: Total mass flux of isobutane in particle 15 (kg/s) 148: Total mass flux of n-butane in particle 15 (kg/s) 149: Total mass flux of isopentane in particle 15 (kg/s) 150: Total mass flux of n-pentane in particle 15 (kg/s) 151: Total heat flux of particle 15 (J/s) 152: Time since release of particle 15 (s) 153: Lambda coordinate of particle 15 (m) 154: Eta coordinate of particle 15 (m) 155: Csi coordinate of particle 15 (m) 156: Total mass flux of carbon_dioxide in particle 16 (kg/s) 157: Total mass flux of nitrogen in particle 16 (kg/s) 158: Total mass flux of methane in particle 16 (kg/s) 159: Total mass flux of ethane in particle 16 (kg/s) 160: Total mass flux of propane in particle 16 (kg/s) 161: Total mass flux of isobutane in particle 16 (kg/s) 162: Total mass flux of n-butane in particle 16 (kg/s) 163: Total mass flux of isopentane in particle 16 (kg/s) 164: Total mass flux of n-pentane in particle 16 (kg/s) 165: Total heat flux of particle 16 (J/s) 166: Time since release of particle 16 (s) 167: Lambda coordinate of particle 16 (m) 168: Eta coordinate of particle 16 (m) 169: Csi coordinate of particle 16 (m) 170: Total mass flux of carbon_dioxide in particle 17 (kg/s) 171: Total mass flux of nitrogen in particle 17 (kg/s) 172: Total mass flux of methane in particle 17 (kg/s) 173: Total mass flux of ethane in particle 17 (kg/s) 174: Total mass flux of propane in particle 17 (kg/s) 175: Total mass flux of isobutane in particle 17 (kg/s) 176: Total mass flux of n-butane in particle 17 (kg/s) 177: Total mass flux of isopentane in particle 17 (kg/s) 178: Total mass flux of n-pentane in particle 17 (kg/s) 179: Total heat flux of particle 17 (J/s) 180: Time since release of particle 17 (s) 181: Lambda coordinate of particle 17 (m) 182: Eta coordinate of particle 17 (m) 183: Csi coordinate of particle 17 (m) 184: Total mass flux of carbon_dioxide in particle 18 (kg/s) 185: Total mass flux of nitrogen in particle 18 (kg/s) 186: Total mass flux of methane in particle 18 (kg/s) 187: Total mass flux of ethane in particle 18 (kg/s) 188: Total mass flux of propane in particle 18 (kg/s) 189: Total mass flux of isobutane in particle 18 (kg/s) 190: Total mass flux of n-butane in particle 18 (kg/s) 191: Total mass flux of isopentane in particle 18 (kg/s) 192: Total mass flux of n-pentane in particle 18 (kg/s) 193: Total heat flux of particle 18 (J/s) 194: Time since release of particle 18 (s) 195: Lambda coordinate of particle 18 (m) 196: Eta coordinate of particle 18 (m) 197: Csi coordinate of particle 18 (m) 198: Total mass flux of carbon_dioxide in particle 19 (kg/s) 199: Total mass flux of nitrogen in particle 19 (kg/s) 200: Total mass flux of methane in particle 19 (kg/s) 201: Total mass flux of ethane in particle 19 (kg/s) 202: Total mass flux of propane in particle 19 (kg/s) 203: Total mass flux of isobutane in particle 19 (kg/s) 204: Total mass flux of n-butane in particle 19 (kg/s) 205: Total mass flux of isopentane in particle 19 (kg/s) 206: Total mass flux of n-pentane in particle 19 (kg/s) 207: Total heat flux of particle 19 (J/s) 208: Time since release of particle 19 (s) 209: Lambda coordinate of particle 19 (m) 210: Eta coordinate of particle 19 (m) 211: Csi coordinate of particle 19 (m) 212: Mass of dissolved carbon_dioxide (kg) 213: Mass of dissolved nitrogen (kg) 214: Mass of dissolved methane (kg) 215: Mass of dissolved ethane (kg) 216: Mass of dissolved propane (kg) 217: Mass of dissolved isobutane (kg) 218: Mass of dissolved n-butane (kg) 219: Mass of dissolved isopentane (kg) 220: Mass of dissolved n-pentane (kg) 221: Mass of tracer in (kg)

Individual Files: