108
Kemle-von Mucke and Oberhiinsli
N. dutertrei (from surface sediment)
%
5()
<5
<.
35
-10
30
25
-20
20
LJ
15
I.
0
()
)
, I,
-10
0
Fig. 13. Regional distribution of N. dutertrei in percent.
G. crassaformis (from surface sediment)
1Ui-..,.......,.....
%
N
-1
"
-20
~
0 -
-30
r
1
S
W -10
0
10
N. dutertrei (0-50 m water layer)
o[
(
..
,
22
-10 1
8
1"
2()
,.
16
-20
1<
..
12
~
I.
•
-30 r
•
•
-40 1 ,
-20
-10
0
10
20
G. crassaformis (0-50 m water layer)
10 r
•
o
-10
-20
-30
••
e> •
-40 r---------~----~--~
-20
-10
%
- 3
Fig. 14. Regional distribution ofG. crassaformis in percent.
profiles for calcite using measured temperatures,
measured 8"0 of sea water (Table 5) and the
Epstein paleotemperature equation (Epstein et al.
1953). In contrast to sediment analyses (Niebler et.
al. this volume) our plankton-tow study allowed us
to calibrate the isotopic data ofthe species with the
in situ temperature and 8"0 of sea water (Table
4,5).
To confirm the general validity of our measured
8"0 sea water values, we also computed