# File McMurdo_balloon_Dec.amc - Model for the atmosphere above a # balloon launched from McMurdo Station, at latitude 77.8 deg S, for the # month of December. # ? ? usage: am McMurdo_balloon_Dec.amc fmin fmax df zenith_angle ? ? where: fmin = minimum frequency ? fmax = maximum frequency ? df = frequency grid interval ? za = zenith angle ? ? example: am McMurdo_balloon_Dec.amc 325 GHz 425 GHz 0.2 MHz 0 deg ? ? Setting df = 0.2 MHz will resolve all lines to the lowest-pressure level ? (1 mbar) in this model. Run time and output size can be considerably ? reduced by setting df = 1 MHz, for which only a small fraction of line ? cores will be unresolved. ? ? To use this file at a given flight pressure, comment out layers at ? higher pressure. The comments in this file indicating the altitude for ? each pressure level follow the CIRA-86 reference atmosphere. ? ? Because Doppler broadening is neglected, it is recommended to use this ? file for frequencies fmax < 1000 GHz. ? # # # Layer pressures and temperatures here are interpolated from the CIRA-86 # reference atmosphere for December, for 77.8 deg S latitude. # # Reference: # # Committee on Space Research (COSPAR). The COSPAR International Atmosphere # (CIRA-86), [Internet]. NCAS British Atmospheric Data Centre, 2006-2011. # Available from # http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dataent_CIRA . # # # Ozone mixing ratios are interpolated from the Fortuin-Kelder ozone # climatology for December, for 77.8 deg S latitude. # # Reference: # # J. Paul F. Fortuin and Hennie Kelder 1998, "An ozone climatology based # on ozonesonde and satellite measurements." JGR 103:31709. # Available from # http://www.knmi.nl/research/climate_chemistry/Data/FKClimatology/ # # # Water vapor mixing ratios are based on Fig. 5a in # # K. H. Rosenlof, A. F. Tuck, K. K. Kelly, J. M. Russell III, and # M. P. McCormick 1997, "Hemispheric asymmetries in water vapor and # inferences about transport in the lower stratosphere." JGR 102:13213 # # Here, the h2o vmr has been approximated as linear in log(P) from 4 ppm at # 100 mbar to 6 ppm at 1 mbar, and constant at 6 ppm for P < 1 mbar. # # # Command-line input for frequency grid and zenith angle includes both # value and unit. # f %1 %2 %3 %4 %5 %6 output f GHz tau Tb K za %7 %8 tol 1.0e-4 T0 2.7 K layer Pbase 1.000 mbar # z = 50.60 km Tbase 287.047 K column dry_air vmr column o3 vmr 1.984e-06 column h2o vmr 6.0e-06 layer Pbase 2.000 mbar # z = 44.73 km Tbase 285.887 K column dry_air vmr column o3 vmr 2.713e-06 column h2o vmr 5.8e-06 layer Pbase 3.000 mbar # z = 41.39 km Tbase 279.883 K column dry_air vmr column o3 vmr 4.094e-06 column h2o vmr 5.6e-06 layer Pbase 4.000 mbar # z = 39.03 km Tbase 273.956 K column dry_air vmr column o3 vmr 5.049e-06 column h2o vmr 5.5e-06 layer Pbase 5.000 mbar # z = 37.26 km Tbase 269.190 K column dry_air vmr column o3 vmr 5.654e-06 column h2o vmr 5.3e-06 layer Pbase 6.000 mbar # z = 35.84 km Tbase 265.244 K column dry_air vmr column o3 vmr 6.000e-06 column h2o vmr 5.3e-06 layer Pbase 7.000 mbar # z = 34.61 km Tbase 261.737 K column dry_air vmr column o3 vmr 6.087e-06 column h2o vmr 5.2e-06 layer Pbase 8.000 mbar # z = 33.63 km Tbase 258.890 K column dry_air vmr column o3 vmr 6.060e-06 column h2o vmr 5.1e-06 layer Pbase 9.000 mbar # z = 32.70 km Tbase 256.076 K column dry_air vmr column o3 vmr 5.920e-06 column h2o vmr 5.1e-06 layer Pbase 10.000 mbar # z = 31.96 km Tbase 253.369 K column dry_air vmr column o3 vmr 5.780e-06 column h2o vmr 5.0e-06 layer Pbase 11.000 mbar # z = 31.21 km Tbase 250.663 K column dry_air vmr column o3 vmr 5.690e-06 column h2o vmr 5.0e-06 # layer # Pbase 12.000 mbar # z = 30.61 km # Tbase 248.169 K # column dry_air vmr # column o3 vmr 5.651e-06 # column h2o vmr 4.9e-06 # # layer # Pbase 13.000 mbar # z = 30.04 km # Tbase 245.745 K # column dry_air vmr # column o3 vmr 5.612e-06 # column h2o vmr 4.9e-06 # # layer # Pbase 14.000 mbar # z = 29.48 km # Tbase 243.322 K # column dry_air vmr # column o3 vmr 5.572e-06 # column h2o vmr 4.9e-06 # # layer # Pbase 15.000 mbar # z = 28.99 km # Tbase 241.643 K # column dry_air vmr # column o3 vmr 5.533e-06 # column h2o vmr 4.8e-06 # # layer # Pbase 16.000 mbar # z = 28.56 km # Tbase 240.572 K # column dry_air vmr # column o3 vmr 5.493e-06 # column h2o vmr 4.8e-06 # # layer # Pbase 17.000 mbar # z = 28.14 km # Tbase 239.502 K # column dry_air vmr # column o3 vmr 5.454e-06 # column h2o vmr 4.8e-06 # # layer # Pbase 18.000 mbar # z = 27.71 km # Tbase 238.431 K # column dry_air vmr # column o3 vmr 5.415e-06 # column h2o vmr 4.8e-06 # # layer # Pbase 19.000 mbar # z = 27.32 km # Tbase 237.740 K # column dry_air vmr # column o3 vmr 5.375e-06 # column h2o vmr 4.7e-06 # # layer # Pbase 20.000 mbar # z = 27.00 km # Tbase 237.511 K # column dry_air vmr # column o3 vmr 5.336e-06 # column h2o vmr 4.7e-06 # # layer # Pbase 21.000 mbar # z = 26.67 km # Tbase 237.282 K # column dry_air vmr # column o3 vmr 5.284e-06 # column h2o vmr 4.7e-06 # # layer # Pbase 22.000 mbar # z = 26.34 km # Tbase 237.053 K # column dry_air vmr # column o3 vmr 5.218e-06 # column h2o vmr 4.7e-06 # # layer # Pbase 23.000 mbar # z = 26.01 km # Tbase 236.824 K # column dry_air vmr # column o3 vmr 5.153e-06 # column h2o vmr 4.6e-06 # # layer # Pbase 24.000 mbar # z = 25.69 km # Tbase 236.641 K # column dry_air vmr # column o3 vmr 5.088e-06 # column h2o vmr 4.6e-06 # # layer # Pbase 25.000 mbar # z = 25.44 km # Tbase 236.670 K # column dry_air vmr # column o3 vmr 5.023e-06 # column h2o vmr 4.6e-06 #