Table 2. Annual Average Global Budgets of 210Pb and 7Be in the Troposphere for 2013
                               210Pb         7Be
  Burden, g                   229.338      3.50286
  Residence time, days        7.10582      24.9516
  Sources, g d-1        
    from stratosphere        0.219856    0.0529614
    within troposphere        32.0661     0.132687
  Sinks, g d-1          
    dry deposition            3.90212    0.0102709
    wet deposition            28.3646     0.129784
      stratiform              19.9166     0.103733
      convective              8.44793    0.0260514
    radioactive decay       0.0192987    0.0455928
 
Accumulation Term       
  Initial mass, g             215.702      8.92075
  Final   mass, g             215.594      8.92035
  Difference, g             -0.107605 -0.000395775