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Figure 6.9 Three
representative proxy data
sets for locations in the SH:
(a) tree-rings in New Zealand
(Cook et al.
2002
: permission
from American Geophysical
Union); (b) Antarctic O
18
data
from ice cores compared to
those in Greenland, China,
and Peru (reprinted from
Thompson et al.
1993
, with
permission from Elsevier);
and (c) speleothem records
from southern Cape Province,
Southern Africa (Lindesay
1998
, Figure 6.14, Copyright
John Wiley and Sons Ltd.,
with permission), illustrating
regional variations in
temperatures over the past
2000 years. Higher O
18
values
indicate colder temperatures.
(a)
17
16
15
14
13
12
900
1000
1100
1200
1300
1400 1500
Year
1600
1700
1800
1900
2000
(b)
18
O(‰) Decadal Averages
δ
Camp Century
Greenland
Dunde
China
Quelccaya
Peru
South Pole
Antarctica
Siple Station
Antarctica
77
°
10'
N, 61
°
08'
W
38
°
06'
N, 96
°
24'
E
13
°
56'
S, 70
°
50'
W
75
°
55'
S, 84
°
15'
W
-31
-29
-27-12.5
-10.5
-21.0
-19.0
-17.0
-52.5
-51.5
-50.5
-49.5
-31.5
-30.5
-29.5
-28.5
1980
1980
1980
1900
1900
1900
1820
1820
1820
1740
1740
1740
1660
1660
1660
Year
(AD)
1580
1580
1580
1500
1500
1500
1420
1420
1420
1340
1340
1260
1260
1180
1100
(c)
18
17
16
15
14
0
0.5
1.0
Years (× 1000 BP)
1.5
2.0
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