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(a)
H
H
2
H
H
H
HH
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
1.5
200
H
H
H
H
H
H
H
H H
H
H
H
H
H
H
1
H
H
H
H
H
H
H
H
H
150
0.5
H
100
0
(b)
50
−28
3
3
0
−27
3
3
3
3
3
3
3
3
3
3
3
3 3
3
3
3
3
3 3
3
3
3
3
(c)
3
3
3
3
3
3
+C
3
33
−26
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
−25
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
33
3
−24
3
3
3
+C
4
3
J
J
J
J
J
J
−20
−15
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
−10
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
wetter
J
J
J
J
−5
J
J
(d)
J
J
J
J
J
J
J
J
J
0
J
J
J
J
J
5
J
drier
J
15
(e)
10
470
460
5
0
450
(f)
440
0
1
2
3
4
5
6
7
8
9
10
11
12
age [ka]
Fig. 2 a Terrigenous
flux at ODP658 showing the inferred abrupt end of the AHP (deMenocal
et al.
2000
), b Plant-wax concentration (as n-C
29
alkane) in GeoB7920-2 indicating predominant
eolian transport, c Compound-specific
δ
13
C compositions of n-C
29
alkane showing higher C
4
plant
contributions during the AHP, d Estimated anomaly of precipitation
D versus Latest Holocene
indicating a gradual continental hydrologic change; diamonds show simulated mean
δ
D
P
anomalies of the ECHAM5-JSBACH time slice experiments at PI, 2,000, 4,000, and 6,000 years
BP, e Modeled NW African precipitation amount of the transient experiment between 6,000 years
BP and pre-industrial by Fischer and Jungclaus (
2011
) shown as 30-year running mean, f Mean
boreal summer insolation at 20
δ
°
N (Laskar et al.
2004
)
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