1940-1949 MONTHLY VOLCANIC FORCING IN 45-DEGREE-LAT BANDS FROM N TO S
    1    1    1    1    1    1    1    1   27   25   27   21
    1    1    1    1    1    1    1    1   27   25   27   21
   44   49   52   45   46   45   43   40   30   22    1    1
   44   49   52   45   46   45   43   40   30   22    1    1
    1    1    1    1    1    1    1    1   26   21   22    1
    1    1    1    1    1    1    1    1   26   21   22    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
   40   46   51   52   60   62   66   69  120  116  113  115
   40   46   51   52   60   62   66   69  120  116  113  115
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
  116   94   93   78   75   73   75   75   78   36   21    1
  116   94   93   78   75   73   75   75   78   36   21    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1   23   27   34   35   41   47   46   39   39
    1    1    1   23   27   34   35   41   47   46   39   39
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
   46   51   56   51   40   32   30   32   26   22    1    1
   46   51   56   51   40   32   30   32   26   22    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
   29   22   21   24   27    1    1    1    1    1    1    1
   29   22   21   24   27    1    1    1    1    1    1    1
    1    1    1    1    1   25    1    1    1    1    1    1
    1    1    1    1    1   25    1    1    1    1    1    1
    1    1    1    1    1    1   64   62   61   48   46   34
    1    1    1    1    1    1   64   62   61   48   46   34
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1    1    1    1    1    1    1    1    1    1    1    1
    1   22   22   22    1   25   32   41   42   36   27   25
    1   22   22   22    1   25   32   41   42   36   27   25
    1    1   27   31   42   48   51   47   42   41   30   31
    1    1   27   31   42   48   51   47   42   41   30   31

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  NOTE: data in (12 months) by (4 lat-zones) by (10 years)
        to get actual values of optical depth use a factor of 1.e-4