Table 2. Annual Average Global Budgets of 210Pb and 7Be in the Troposphere for 2013
                               210Pb         7Be
  Burden, g                   229.335      3.51044
  Residence time, days        7.10581      24.9815
  Sources, g d-1        
    from stratosphere        0.219894    0.0531920
    within troposphere        32.0656     0.132685
  Sinks, g d-1          
    dry deposition            3.90206    0.0102795
    wet deposition            28.3642     0.129907
      stratiform              19.9163     0.103831
      convective              8.44786    0.0260760
    radioactive decay       0.0192984    0.0456914
 
Accumulation Term       
  Initial mass, g             215.702      8.96018
  Final   mass, g             215.592      8.95978
  Difference, g             -0.110504 -0.000405312