A new method for constructing Pb-210 chronology of young peat profiles sampled with low frequency
Article Category: Regular Articles
Publié en ligne: 06 févr. 2019
Pages: 1 - 14
Reçu: 04 juil. 2018
Accepté: 04 janv. 2019
© 2019 J. Sikorski published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Parameters a, b, c of the functions obtained in TableCurve program.
Core |
a |
b |
c |
BB3 |
6.093(45) |
–0.391(52) |
2.5 |
BB3 shortened |
6.148(52) |
–0.486(77) |
2.5 |
BB4 |
6.175(26) |
–0.499(38) |
2.5 |
BB4 shortened |
6.220(26) |
–0.618(45) |
2.5 |
BM3 |
6.063(39) |
–0.420(61) |
2.5 |
BM3 shortened |
6.062(49) |
–0.417(80) |
2.5 |
BM4 |
6.022(36) |
–0.198(35) |
3.0 |
BM4 shortened |
6.018(40) |
–0.187(41) |
3.0 |
Average growth rates of the investigated peat bogs.
|
Average growth rates (mm/y) |
Core |
by 1967 |
from 1967 to present times |
|
|
weighted average |
|
weighted average |
BB3 |
1.03(12) |
1.10(13) |
3.41(19) |
3.21(18) |
BB4 |
1.21(15) |
3.04(18) |
BM3 |
1.15(13) |
0.99(12) |
3.26(18) |
3.40(18) |
BM4 |
0.87(11) |
3.54(18) |
TW1 |
1.34(16) |
TW2 |
1.41(17) |
Comparison of measured and approximated values of supported 210Pb.
Core |
Depth (cm) |
Measured values of supported 210Pb (Bq/kg) |
Approximated values of supported 210Pb (Bq/kg) |
t-test |
p-value |
BB3 |
29.5 |
12.2(81) |
14.7(91) |
0.21 |
0.84 |
BB4 |
29.5 |
15.3(83) |
13.8(90) |
0.12 |
0.91 |
BM3 |
31.5 |
20.8(95) |
22.9(99) |
0.15 |
0.88 |
BM4 |
29.5 |
23.4(96) |
23.1(98) |
0.02 |
0.98 |