414
Land-Ocean Systems in the Siberian Arctic: Dynamics and History
Table 2: Summary of regional pollen assemblage zones (PAZs) in the sediment core POll II from Lama Lake.
PAZ
Depth [cm]
Description
LI
1060-792
NAP zone (tree- and shrubless, extremely cold and dry)
L2
792-753
NAP-shrub-birch zone (interstadial character)
L3
753-733
asLi
L4
733-673
birch-NAP zone (interstadial character)
L5
673-623
NAP-birch zone (stadial character)
L6
623-573
birch-larch zone (beginning of a period with interglacial character)
L7
573-483
larch-birch-alder zone
L8
483-319
spruce-Iarch-birch-alder zone
L9
319-150
spruce-Iarch-birch-alder zone with alternating spruce values
LlO
150-70
birch-alder zone with high NAP values
Lli
70-0
birch-alder zone with extremely high NAP values
Table 3: Summary of regional pollen assemblage zones (PAZs) in the sediment core PG1228 from LevinsonLessing Lake.
PAZ
Depth [cm]
Description
LLD
2237-1955
NAP zone (no shrubs, extremely cold and dry)
LLC
1955-1935
birch-alder-NAP zone (interstadial character)
LLB
1935-1815
asLLD
LLA
1815-1705
birch-alder-NAP zone (interstadial character)
LLI
1705-905
NAP zone (no shrubs, extremely cold and dry)
LL2
905-855
NAP zone with a minor spread of Cyp. and birch shrubs (incr. humidity)
LL3
855-835
as LLI
LL4
835-745
birch-NAP zone (interstadial character)
LL5
745-710
NAP-birch zone (stadial character)
LL6
710-650
birch zone (beginning of a period with interglacial character)
LL7
650-590
alder-birch zone (climatic optimum)
LL8
590-350
birch-alder-NAP zone (AP values above 50%)
LL9
350-0
NAP-birch-alder zone (AP values below 50%)
In the lower part of core PG1228 from Levinson-Lessing Lake two PAZs of interstadial
character (LLA and LLC) are incised in PAZs of stadial character (LL!, LLB, and LLD). The
core PG 1111 from Lama Lake did not penetrate this succession. It probably represents the
upper part of the Middle Weichselian. An unstable climate with several rapid temperature rises
is recorded in the GRIP ice core from Greenland for the period 23 - 58 ka BP (Daansgard et aI.,
1993). These interstadials include the most recent prominent Middle Weichselian thermomer
recorded in central Europe, the Denekamp Interstadial, which was dated to 32 - 28 ka BP
Land-Ocean Systems in the Siberian Arctic: Dynamics and History
Table 2: Summary of regional pollen assemblage zones (PAZs) in the sediment core POll II from Lama Lake.
PAZ
Depth [cm]
Description
LI
1060-792
NAP zone (tree- and shrubless, extremely cold and dry)
L2
792-753
NAP-shrub-birch zone (interstadial character)
L3
753-733
asLi
L4
733-673
birch-NAP zone (interstadial character)
L5
673-623
NAP-birch zone (stadial character)
L6
623-573
birch-larch zone (beginning of a period with interglacial character)
L7
573-483
larch-birch-alder zone
L8
483-319
spruce-Iarch-birch-alder zone
L9
319-150
spruce-Iarch-birch-alder zone with alternating spruce values
LlO
150-70
birch-alder zone with high NAP values
Lli
70-0
birch-alder zone with extremely high NAP values
Table 3: Summary of regional pollen assemblage zones (PAZs) in the sediment core PG1228 from LevinsonLessing Lake.
PAZ
Depth [cm]
Description
LLD
2237-1955
NAP zone (no shrubs, extremely cold and dry)
LLC
1955-1935
birch-alder-NAP zone (interstadial character)
LLB
1935-1815
asLLD
LLA
1815-1705
birch-alder-NAP zone (interstadial character)
LLI
1705-905
NAP zone (no shrubs, extremely cold and dry)
LL2
905-855
NAP zone with a minor spread of Cyp. and birch shrubs (incr. humidity)
LL3
855-835
as LLI
LL4
835-745
birch-NAP zone (interstadial character)
LL5
745-710
NAP-birch zone (stadial character)
LL6
710-650
birch zone (beginning of a period with interglacial character)
LL7
650-590
alder-birch zone (climatic optimum)
LL8
590-350
birch-alder-NAP zone (AP values above 50%)
LL9
350-0
NAP-birch-alder zone (AP values below 50%)
In the lower part of core PG1228 from Levinson-Lessing Lake two PAZs of interstadial
character (LLA and LLC) are incised in PAZs of stadial character (LL!, LLB, and LLD). The
core PG 1111 from Lama Lake did not penetrate this succession. It probably represents the
upper part of the Middle Weichselian. An unstable climate with several rapid temperature rises
is recorded in the GRIP ice core from Greenland for the period 23 - 58 ka BP (Daansgard et aI.,
1993). These interstadials include the most recent prominent Middle Weichselian thermomer
recorded in central Europe, the Denekamp Interstadial, which was dated to 32 - 28 ka BP