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Progress in Earth and Planetary Science

Table 2 Seasonal or yearly frequency variations of 15 single isolated insoluble CsMPs

From: Atmospheric resuspension of insoluble radioactive cesium-bearing particles found in the difficult-to-return area in Fukushima

Sampling year

 

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Total

Yearly frequency

2015

Number of CsMPs

0

0

0

0

2

1

1

0

0

2

0

0

6

2.1 × 10−2 granule·day−1

 

Sampling period/days

18

0

14

14.5

31

30

31

31

30

31

29

31

290.5

 

2016

Number of CsMPs

1

0

1

1

0

0

0

0

0

0

0

0

3

8.5 × 10−3 granule·day−1

 

Sampling period/days

31

29

31

30

31

30

31

31

30

31

30

17.5

352.5

 

2018

Number of CsMPs

0

0

1

0

1

0

0

1

0

0

0

0

3

8.7 × 10−3 granule·day−1

 

Sampling period/days

12.5

28

31

30

31

30

31

31

30

31

30

31

346.5

 

2019

Number of CsMPs

0

0

1

1

0

0

0

1

0

0

0

0

3

1.3 × 10−2 granule·day−1

 

Sampling period/days

23.5

0

30.5

30

31

30

31

31

18.5

0

0

0

225.5

 
               

Seasonal frequency

Dec.–Feb. (DJF)

Number of CsMPs

1

            

4.5 × 10−3 granule·day−1

 

Sampling period/days

221.5

             

Mar.–May (MAM)

Number of CsMPs

8

            

2.4 × 10−2 granule·day−1

 

Sampling period/days

335

             

Jun.–Aug. (JJA)

Number of CsMPs

4

            

1.1 × 10−2 granule·day−1

 

Sampling period/days

368

             

Sep.–Nov. (SON)

Number of CsMPs

2

            

6.9 × 10−3 granule·day−1

 

Sampling period/days

290.5

             
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