# 
# This is the digitially read Li & Milliken data (equivalent hydrogen) from Figure 8 of Lawrence et al., 2022, submitted.
#      LATITUDE      HYDROGEN
      84.56896      80.11696
      83.79311      76.60818
      83.53448      72.22222
      83.01724      69.88304
      82.75862      64.03509
      81.20689      59.94152
      80.68965      55.55556
      79.65517      51.75438
      78.10345      48.24562
      76.55173      45.90643
      75.25862      44.73684
      74.48276      40.93567
      73.18965      37.71930
      71.37931      34.21053
      69.56896      30.99415
      67.24138      27.77778
      65.43104      26.02339
      63.62069      24.85380
      63.36207      22.22222
      61.55172      20.17544
      59.74138      18.42105
      57.67241      17.25146
      56.37931      16.08187
      53.79310      13.74269
      51.98276      11.98830
      49.65517      10.81871
      48.36207      9.064327
      46.29310      8.187135
      43.44828      8.187135
      41.89655      7.602339
      40.08621      7.017544
      38.53448      6.140351
      36.72414      6.140351
      35.43103      5.263158
      33.87931      4.678362
      32.06897      4.385965
      30.25862      3.801169
      28.70690      4.093567
      27.15517      4.385965
      25.60345      3.508772
      24.05172      2.631579
      23.01724      3.508772
      21.46552      3.801169
      19.65517      3.216374
      18.62069      3.508772
      17.58621      3.216374
      16.29310      3.216374
      15.25862      3.216374
      14.22414      3.216374
      13.18966      3.508772
      12.41379      3.508772
      11.37931      3.508772
      10.34483      3.216374
      9.051724      2.923977
      8.017241      3.216374
      7.241379      3.216374
      6.206897      2.923977
      4.655172      3.216374
      3.620690      3.216374
      2.586207      3.216374
      1.293103      3.216374
     0.2586207      2.923977
    -0.7758621      3.216374
     -1.810345      3.216374
     -2.844828      3.216374
     -3.620690      2.923977
     -4.655172      3.216374
     -5.689655      3.216374
     -6.982759      3.216374
     -8.017241      2.923977
     -9.051724      2.923977
     -10.08621      2.923977
     -11.12069      3.216374
     -12.15517      3.216374
     -13.18966      3.216374
     -14.48276      2.923977
     -16.03448      3.216374
     -17.06897      3.216374
     -18.10345      3.508772
     -19.13793      3.508772
     -20.17241      3.508772
     -21.46552      3.508772
     -22.75862      3.508772
     -24.31034      3.508772
     -25.34483      3.801169
     -26.37931      4.093567
     -27.41379      4.385965
     -28.44828      4.678362
     -29.48276      5.263158
     -30.51724      5.847953
     -31.81034      5.847953
     -33.10345      5.847953
     -34.39655      6.140351
     -35.94828      6.432749
     -36.98276      6.725146
     -38.27586      7.017544
     -39.31034      7.602339
     -40.34483      7.894737
     -41.63793      8.479532
     -42.67241      9.064327
     -43.96552      9.356725
     -45.00000      9.649122
     -46.03448      9.941521
     -46.81034      11.11111
     -47.58621      11.69591
     -48.87931      11.98830
     -50.17241      12.57310
     -51.20690      13.45029
     -52.24138      13.74269
     -53.27586      14.91228
     -54.31034      15.78947
     -55.34483      16.66667
     -56.37931      17.54386
     -57.41379      17.83626
     -58.44828      18.42105
     -59.48276      19.00585
     -60.00000      20.46784
     -60.77586      21.63743
     -61.55172      22.51462
     -62.84483      23.09941
     -63.36207      24.56140
     -64.39655      25.14620
     -65.17242      26.31579
     -65.94827      25.73100
     -66.72414      26.90059
     -67.24138      28.07018
     -67.75862      29.82456
     -68.27586      30.99415
     -69.05173      31.87135
     -69.56896      33.33333
     -70.08620      34.50292
     -70.86207      35.67252
     -71.37931      36.54971
     -72.41380      37.13451
     -73.44827      38.30409
     -74.48276      39.76608
     -75.25862      40.05848
     -76.03448      41.22807
     -77.32758      42.39766
     -77.84483      43.56725
     -78.62069      44.73684
     -79.65517      46.19883
     -79.91380      48.53801
     -80.17242      49.41521
     -81.20689      48.83041
     -83.01724      48.24562
     -84.05173      50.87719
     -84.31035      53.80117
     -84.56896      54.97076