Table 2. Annual Average Global Budgets of 210Pb and 7Be in the Troposphere for 2013
                               210Pb         7Be
  Burden, g                   205.551      3.27337
  Residence time, days        6.37603      22.7988
  Sources, g d-1        
    from stratosphere        0.200768    0.0531059
    within troposphere        32.0656     0.132685
  Sinks, g d-1          
    dry deposition            3.32588   0.00626941
    wet deposition            28.9232     0.136914
      stratiform              22.2968     0.124153
      convective              6.62642    0.0127610
    radioactive decay       0.0173020    0.0426082
 
Accumulation Term       
  Initial mass, g             197.303      8.73003
  Final   mass, g             197.183      8.72953
  Difference, g             -0.120178 -0.000503540