Table 2. Annual Average Global Budgets of 210Pb and 7Be in the Troposphere for 2013
                               210Pb         7Be
  Burden, g                   229.338      3.51047
  Residence time, days        7.10583      24.9816
  Sources, g d-1        
    from stratosphere        0.219864    0.0531919
    within troposphere        32.0661     0.132687
  Sinks, g d-1          
    dry deposition            3.90212    0.0102796
    wet deposition            28.3646     0.129907
      stratiform              19.9166     0.103831
      convective              8.44793    0.0260759
    radioactive decay       0.0192987    0.0456918
 
Accumulation Term       
  Initial mass, g             215.705      8.96021
  Final   mass, g             215.595      8.95981
  Difference, g             -0.110535 -0.000404358