482
Andersen et al.
the results of direct measurements in the North
Upwelling of COz-rich waters probably
AtIantic(Watson etal. 1991; Robertson et al. 1993) increases the PCO z in the surface water more
and oceanic modelling (Taylor et al. 1991; Gars:on strongly than the coincident increase of productivet al. 1992), which all show that phytoplankton ity will reduce it. For example, in the coastal upblooms can cause rapid lowering of surface water welling region of Oman, today's surface water
PCO z . However, these studies were done in areas PCO z is several hundred Ilatm higher than in the
not strongly influenced by upwelling processes.
Depth
Age
SST
or
ol5N
Alkenone-oi3C
± N PCOz
[em]
[ka]
[0C] [%0 PDB] [%0 air]
[%0 PDB]
[%0]
[Ilatm]
6
1.3 25.1
1.59
7.81
-23.48
0.04 2
301
28
6.0 26.1
1.65
8.80
-23.64
0.17 3
299
43
8.2 24.2
1.23
7.64
-24.15
0.20 5
303
63
11.2 22.8
1.09
6.67
-23.96
0.26 2
297
108
17.8 21.7
1.24
6.24
-24.32
0.01 2
305
123
19.6 21.5
1.30
6.44
-24.04
0.31
3
294
163
25.5 22.1
2.09
6.46
-24.16
0.34 4
325
203
34.9 21.1
1.10
5.52
-23.20
0.03 3
281
D[J
47.4 20.7
2.05
5.85
-23.30
0.32
~ I
295
248
47.4 20.7
2.05
5.85
-23.39
0.16
297
308
59.2 22.3
1.09
6.50
-23.43
0.32 3
282
343
64.7 20.6
1.14
5.27
-23.41
0.00 2
285
DIJ
69.3 21.5
1.31
5.78
-23.67
0.25 2
296
373
69.3 21.5
1.31
5.78
-24.38
0.22 3
314
433
78.5 23.8
2.04
7.16
-24.20
0.36 4
331
443
80.0 24.4
1.86
7.59
-23.62
0.07 3
309
463
84.0 23.3
1.41
6.55
-23.04
0.32 2
290
478
87.0 24.8
1.78
5.44
-22.93
0.34 3
331
528
100.0 25.0
1.75
6.22
-24.18
0.10 4
355
578
112.6 24.3
1.09
6.00
-24.28
0.17 4
334
593
118.3 25.0
1.45
6.32
-23.55
0.39 4
326
608
123.8 26.0
1.74
7.36
-23.92
0.10 3
336
618
127.3 26.2
1.17
6.89
-25.15
0.08 3
371
638
134.3 24.2
0.84
5.82
-24.05
0.30 4
323
693
147.1 24.0
1.50
5.19
-23.93
0.12 3
347
713
150.2 21.7
1.02
5.81
-24.19
0.17 2
304
GO
160.3 23.6
1.18
6.13
-25.19
0.46 2
354
753
160.3 23.6
1.18
6.13
-24.97
0.32 2
347
793
171.0 24.8
1.17
6.29
-24.33
0.26 4
339
[J[J
181.7 24.8
1.05
5.05
-23.95
0.25 2
347
833
181.7 24.8
1.05
5.05
-24.16
0.42 3
353
843
183.7 24.2
0.98
4.75
-23.64
0.11 4
334
923
196.2 25.6
1.74
7.72
-24.77
0.30 3
351
Table 3. Data set of core GeoB 1016-3 from the Angola Basin used to calculate paleo-peOz. N is the number oftimes
each alkenone extract was measured. Samples which were extracted in duplicate are surrounded with a box.
Andersen et al.
the results of direct measurements in the North
Upwelling of COz-rich waters probably
AtIantic(Watson etal. 1991; Robertson et al. 1993) increases the PCO z in the surface water more
and oceanic modelling (Taylor et al. 1991; Gars:on strongly than the coincident increase of productivet al. 1992), which all show that phytoplankton ity will reduce it. For example, in the coastal upblooms can cause rapid lowering of surface water welling region of Oman, today's surface water
PCO z . However, these studies were done in areas PCO z is several hundred Ilatm higher than in the
not strongly influenced by upwelling processes.
Depth
Age
SST
or
ol5N
Alkenone-oi3C
± N PCOz
[em]
[ka]
[0C] [%0 PDB] [%0 air]
[%0 PDB]
[%0]
[Ilatm]
6
1.3 25.1
1.59
7.81
-23.48
0.04 2
301
28
6.0 26.1
1.65
8.80
-23.64
0.17 3
299
43
8.2 24.2
1.23
7.64
-24.15
0.20 5
303
63
11.2 22.8
1.09
6.67
-23.96
0.26 2
297
108
17.8 21.7
1.24
6.24
-24.32
0.01 2
305
123
19.6 21.5
1.30
6.44
-24.04
0.31
3
294
163
25.5 22.1
2.09
6.46
-24.16
0.34 4
325
203
34.9 21.1
1.10
5.52
-23.20
0.03 3
281
D[J
47.4 20.7
2.05
5.85
-23.30
0.32
~ I
295
248
47.4 20.7
2.05
5.85
-23.39
0.16
297
308
59.2 22.3
1.09
6.50
-23.43
0.32 3
282
343
64.7 20.6
1.14
5.27
-23.41
0.00 2
285
DIJ
69.3 21.5
1.31
5.78
-23.67
0.25 2
296
373
69.3 21.5
1.31
5.78
-24.38
0.22 3
314
433
78.5 23.8
2.04
7.16
-24.20
0.36 4
331
443
80.0 24.4
1.86
7.59
-23.62
0.07 3
309
463
84.0 23.3
1.41
6.55
-23.04
0.32 2
290
478
87.0 24.8
1.78
5.44
-22.93
0.34 3
331
528
100.0 25.0
1.75
6.22
-24.18
0.10 4
355
578
112.6 24.3
1.09
6.00
-24.28
0.17 4
334
593
118.3 25.0
1.45
6.32
-23.55
0.39 4
326
608
123.8 26.0
1.74
7.36
-23.92
0.10 3
336
618
127.3 26.2
1.17
6.89
-25.15
0.08 3
371
638
134.3 24.2
0.84
5.82
-24.05
0.30 4
323
693
147.1 24.0
1.50
5.19
-23.93
0.12 3
347
713
150.2 21.7
1.02
5.81
-24.19
0.17 2
304
GO
160.3 23.6
1.18
6.13
-25.19
0.46 2
354
753
160.3 23.6
1.18
6.13
-24.97
0.32 2
347
793
171.0 24.8
1.17
6.29
-24.33
0.26 4
339
[J[J
181.7 24.8
1.05
5.05
-23.95
0.25 2
347
833
181.7 24.8
1.05
5.05
-24.16
0.42 3
353
843
183.7 24.2
0.98
4.75
-23.64
0.11 4
334
923
196.2 25.6
1.74
7.72
-24.77
0.30 3
351
Table 3. Data set of core GeoB 1016-3 from the Angola Basin used to calculate paleo-peOz. N is the number oftimes
each alkenone extract was measured. Samples which were extracted in duplicate are surrounded with a box.