Table 2. Annual Average Global Budgets of 210Pb and 7Be in the Troposphere for 2013
                               210Pb         7Be
  Burden, g                   234.520      3.50203
  Residence time, days        7.24427      25.0428
  Sources, g d-1        
    from stratosphere        0.210579    0.0524089
    within troposphere        32.1782     0.132687
  Sinks, g d-1          
    dry deposition            3.30795   0.00932994
    wet deposition            29.0611     0.130184
      stratiform              20.5649     0.104071
      convective              8.49618    0.0261127
    radioactive decay       0.0197349    0.0455817
 
Accumulation Term       
  Initial mass, g             221.148      8.93808
  Final   mass, g             221.047      8.93768
  Difference, g             -0.101181 -0.000398636