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Table 2 The relative abundance and concentrations of C37:4, C37:3, and C37:2 alkenones and based on \( {U}_{37}^{\mathrm{k}} \)- and \( {U}_{37}^{\mathrm{k}\prime } \)-SST in the subsamples with different sediment depth of core R23

From: A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean

Depth
(cm)
C37:4
(%)
C37:3
(%)
C37:2
(%)
Alkenones
(ng/g)
\( {U}_{37}^{\mathrm{k}} \)-SSTa
(°C)
\( {U}_{37}^{\mathrm{k}\prime } \)-SSTb
(°C)
16 12 85 4 90.7 0.6 0.1
88 11 87 3 104.2 0.7 0.4
166 30 40 30 13.2 2.8 11.5
243 21 51 28 15.3 4.4 9.2
323 35 48 17 14.7 1.7 6.6
398 16 64 19 50.1 3.5 5.6
482 15 80 6 65.1 0.5 0.7
550 37 38 24 12.6 0.6 10.3
626 30 44 26 14.0 1.8 9.9
698 23 59 18 19.1 1.2 5.7
762 25 27 48 30.2 8.4 17.9
818 30 36 34 19.0 3.6 13.2
  1. a\( {\mathrm{U}}_{37}^{\mathrm{k}\prime } \) = C37:2/(C37:2+ C37:3)
  2. b\( {\mathrm{U}}_{37}^{\mathrm{k}} \) = (C37:2-C37:4)/(C37:2+ C37:3+ C37:4)