256 Paleoceanography - the Deep-Sea Record
o
2
6
B
per mil
'0
.•
·3
SEDIM ENTATION RATE
cm/ky
5
10
15
20
ORGANIC C
%
2
3
ESTIMATED
PALEO- PRODUCTI VITY
gC .. - 2,-1
100
200
300
10 L-________ L-________________ -J __________ ~ __ ~------------~
a
en
o
a..
vi
>
200
j. 160
·E
() 120
0>
80
b
o
10
20
10
20
30
30
AGE ka
40
PRESENT DAY
PRODUCTIVITY
50
60
r
33
16_6 ~
8_ 3 E
5_ 6
PaleoproduC1 lvlty
40
50
60
Fig. 9.10 a, b. Paleoproductivity reconstructions for the late Pleistocene, off NW Africa. a Oxygen
isotopes, sedimentation rates , and organic matter content in Meteor Core 12392. Right Resulting
paleoproductivity estimate . [Po J. Miiller and E. Suess, 1979, Deep-Sea Res. 26A: 1347, and P. J.
Miiller et ai., 1983 in J. Thiede and E. Suess, Coastal upwelling, Part B. Plenum Press, New York],
Isotope stages as in Figs. 9.7. and 9.4 c. (J Holocene; 2-4 last glaciation; 5a-e last interglacial;
6 earlier glaciation). b Importance of wind in producing changes in upwelling, as seen in correlation
with dust supply (from which the strength of the wind is calculated). [M . S. Samthein et ai., 1987 in
W H. Berger and L. D. Labeyrie, eds. Abrupt climatic change - evidence and implications. Reidel
Dordrechtl