Citation:

j.gloplacha.2007.07.004

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Abstract:

To evaluate the consequences of possible future climate changes and to identify the main climate drivers in high latitudes, the vegetation and climate in the East Siberian Arctic during the last interglacial are reconstructed and compared with Holocene conditions. Plant macrofossils from permafrost deposits on Bol'shoy Lyakhovsky Island, New Siberian Archipelago, in the Russian Arctic revealed the existence of a shrubland dominated by Duschekia fruticosa, Betula nana and Ledum palustre and interspersed with lakes and grasslands during the last interglacial. The reconstructed vegetation differs fundamentally from the high arctic tundra that exists in this region today, but resembles an open variant of subarctic shrub tundra as occurring near the tree line about 350 km southwest of the study site. Such difference in the plant cover implies that, during the last interglacial, the mean summer temperature was considerably higher, the growing season was longer, and soils outside the range of thermokarst depressions were drier than today. Our pollen-based climatic reconstruction suggests a mean temperature of the warmest month (MTWA) range of 9-14.5 °C during the warmest interval of the last interglacial. The reconstruction from plant macrofossils, representing more local environments, reached MTWA values above 12.5 °C in contrast to today's 2.8 °C. We explain this contrast in summer temperature and soil moisture with a combination of summer insolation higher than present and climatic continentality in arctic Yakutia stronger than present as result of a considerably less inundated Laptev Shelf during the last interglacial.

Project(s):

Permafrost Research (Periglacial Dynamics) @ AWI (AWI_PerDyn)

Coverage:

Median Latitude: 73.334917 * Median Longitude: 141.321450 * South-bound Latitude: 73.323000 * West-bound Longitude: 141.263000 * North-bound Latitude: 73.346000 * East-bound Longitude: 141.387000

Minimum ELEVATION: 1.00 m a.s.l. * Maximum ELEVATION: 6.85 m a.s.l.

Event(s):

Lya_1999_L11 * Latitude: 73.323000 * Longitude: 141.387000 * Location: Lyakhovsky Islands * Campaign: (Lya_1999) * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: horizontal distance from the Zimov'e River mouth in 1999: 1100 m E

Lya_1999_R6 * Latitude: 73.332000 * Longitude: 141.339000 * Location: Lyakhovsky Islands * Campaign: (Lya_1999) * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: horizontal distance from the Zimov'e River mouth in 1999: 600 m W

Lya_1999_R8+50 * Latitude: 73.332900 * Longitude: 141.332900 * Location: Lyakhovsky Islands * Campaign: (Lya_1999) * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: horizontal distance from the Zimov'e River mouth in 1999: 850 m W

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Kienast, Frank
2	Latitude of event	Latitude		Kienast, Frank
3	Longitude of event	Longitude		Kienast, Frank
4	ELEVATION	Elevation	m a.s.l.	Kienast, Frank	Geocode
5	Area/locality	Area		Kienast, Frank
6	Sample ID	Sample ID		Kienast, Frank
7	Agrostis sp.	Agrostis sp.	#	Kienast, Frank
8	Alnus fruticosa	Aln.f	#	Kienast, Frank
9	Alopecurus sp.	Alopecurus sp.	#	Kienast, Frank
10	Alyssum biovulatum	A. biovulatum	#	Kienast, Frank
11	Androsace septentrionalis	A. septentrionalis	#	Kienast, Frank
12	Artemisia sp.	Artemisia sp.	#	Kienast, Frank
13	Asteraceae sp.	Asteraceae sp.	#	Kienast, Frank
14	Batrachium sp.	Batrachium sp.	#	Kienast, Frank
15	Betula fruticosa	Bet.r	#	Kienast, Frank
16	Betula nana	Bet.n	#	Kienast, Frank	s.l.
17	Betula sp.	Betula sp.	#	Kienast, Frank
18	Betulaceae	Betaea	#	Kienast, Frank
19	Boschniakia rossica	B. rossica	#	Kienast, Frank
20	Brassicaceae indeterminata	Brassicaceae indet	#	Kienast, Frank	sp.
21	Calamagrostis sp.	Calamagrostis sp.	#	Kienast, Frank
22	Callitriche hermaphroditica	C. hermaphroditica	#	Kienast, Frank
23	Caltha palustris	Cat.p	#	Kienast, Frank
24	Carex aquatilis	C. aquatilis	#	Kienast, Frank
25	Carex cf. sect. Temnemis	C. cf. sect. Temnemis	#	Kienast, Frank
26	Carex duriuscula	C. duriuscula	#	Kienast, Frank
27	Carex sect. Phacocystis	Carex sect. Phacocystis	#	Kienast, Frank
28	Carex sp.	Carex sp.	#	Kienast, Frank
29	Carex supina	C. supina	#	Kienast, Frank	s.l.
30	Caryophyllaceae indeterminata	Cphae.indet	#	Kienast, Frank	sp.
31	Cerastium beeringianum	C. beeringianum	#	Kienast, Frank
32	Cerastium cf. regelii	C. cf. regelii	#	Kienast, Frank
33	Cerastium jenissejense	C. jenissejense	#	Kienast, Frank
34	cf. Corydalis sp.	cf. Corydalis sp.	#	Kienast, Frank
35	cf. Lesquerella arctica	cf. L. arctica	#	Kienast, Frank
36	cf. Saxifraga hieracifolia	cf. S. hieracifolia	#	Kienast, Frank
37	Chara sp.	Chara sp.	#	Kienast, Frank
38	Chenopodiaceae indeterminata	Chenopodiaceae indet	#	Kienast, Frank	sp.
39	Chenopodium sp.	Chenopodium sp.	#	Kienast, Frank
40	Chrysosplenium alternifolium	C. alternifolium	#	Kienast, Frank
41	Comarum palustre	Com.p	#	Kienast, Frank
42	Cyperaceae indeterminata	Cypae.indet	#	Kienast, Frank	sp.
43	Deschampsia sp.	Deschampsia sp.	#	Kienast, Frank
44	Descurainia sophioides	D. sophioides	#	Kienast, Frank
45	Draba sp.	Draba sp.	#	Kienast, Frank
46	Dryas octopetala	Dry.o	#	Kienast, Frank	s.l.
47	Empetrum nigrum	Emp.n	#	Kienast, Frank	s.l.
48	Epilobium davuricum	E. davuricum	#	Kienast, Frank
49	Epilobium palustre	E. palustre	#	Kienast, Frank
50	Eriophorum angustifolium	E. angustifolium	#	Kienast, Frank
51	Eriophorum brachyantherum	E. brachyantherum	#	Kienast, Frank
52	Eriophorum cf. gracile	E. cf. gracile	#	Kienast, Frank
53	Eriophorum scheuchzeri	Erio.s	#	Kienast, Frank
54	Eriophorum sp.	Eriophorum sp.	#	Kienast, Frank
55	Eutrema edwardsii	E. edwardsii	#	Kienast, Frank
56	Fabaceae indeterminata	Fabae.indet	#	Kienast, Frank	sp.
57	Festuca sp.	Festuca sp.	#	Kienast, Frank
58	Gastrolychnis involucrata	G. involucrata	#	Kienast, Frank	s.l.
59	Gastrolychnis violascens	G. violascens	#	Kienast, Frank	s.l.
60	Hippuris vulgaris	Hip.v	#	Kienast, Frank	s.l.
61	Juncus castanaeus	J. castanaeus	#	Kienast, Frank
62	Kobresia bellardii	K. bellardii	#	Kienast, Frank
63	Ledum palustre ssp. decumbens	L. palustre ssp. decumbens	#	Kienast, Frank
64	Lloydia serotina	Llo.s	#	Kienast, Frank
65	Luzula cf.wahlenbergii	L. cf.wahlenbergii	#	Kienast, Frank
66	Luzula confusa	L. confusa	#	Kienast, Frank
67	Menyanthes trifoliata	Mey.t	#	Kienast, Frank
68	Minuartia arctica	M. arctica	#	Kienast, Frank
69	Minuartia rubella	M. rubella	#	Kienast, Frank
70	Moehringia laterifolia	M. laterifolia	#	Kienast, Frank
71	Myosotis sp.	Myosotis sp.	#	Kienast, Frank
72	Myriophyllum spicatum	Myo.s	#	Kienast, Frank
73	Oxycoccus microcarpus	O. microcarpus	#	Kienast, Frank
74	Oxyria digyna	Oxy.d	#	Kienast, Frank
75	Papaver sect. Scapiflora	Papaver sect. Scapiflora	#	Kienast, Frank
76	Parnassia palustris	Par.p	#	Kienast, Frank
77	Poa sp.	Poa sp.	#	Kienast, Frank
78	Poaceae sp.	Poaceae sp.	#	Kienast, Frank
79	Potamogeton sp.	Potamogeton sp.	#	Kienast, Frank
80	Polygonum viviparum	Pol.v	#	Kienast, Frank
81	Potamogeton vaginatus	P. vaginatus	#	Kienast, Frank
82	Potentilla arenosa	P. arenosa	#	Kienast, Frank
83	Potentilla hyparctica	P. hyparctica	#	Kienast, Frank
84	Potentilla nivea	P. nivea	#	Kienast, Frank
85	Potentilla sp.	Potentilla sp.	#	Kienast, Frank
86	Potentilla stipularis	P. stipularis	#	Kienast, Frank
87	Primulaceae indeterminata	Priae.indet	#	Kienast, Frank	sp.
88	Puccinelia sp.	Puccinelia sp.	#	Kienast, Frank
89	Puccinellia distans	P. distans	#	Kienast, Frank	s.l.
90	Ranunculus borealis	R. borealis	#	Kienast, Frank
91	Ranunculus cf. pygmaeus	R. cf. pygmaeus	#	Kienast, Frank
92	Ranunculus hyperboreus	R. hyperboreus	#	Kienast, Frank
93	Ranunculus lapponicus	R. lapponicus	#	Kienast, Frank
94	Ranunculus cf. reptans	R. cf. reptans	#	Kienast, Frank	including R. gmelinii
95	Ranunculus turneri	R. turneri	#	Kienast, Frank	including R. repens
96	Rhododendron sp.	Rhododendron sp.	#	Kienast, Frank
97	Rorippa palustris	R. palustris	#	Kienast, Frank
98	Rumex arcticus	R. arcticus	#	Kienast, Frank
99	Rumex maritimus	R. maritimus	#	Kienast, Frank
100	Rumex subgen. acetosella	R. subg. acetosella	#	Kienast, Frank
101	Sagina nivalis	S. nivalis	#	Kienast, Frank
102	Salicaceae	Salicaceae	#	Kienast, Frank
103	Salix sp.	Salix sp.	#	Kienast, Frank
104	Sparganium hyperboreus	S. hyperboreus	#	Kienast, Frank
105	Sparganium minimum	Sparganium min	#	Kienast, Frank
106	Stellaria crassifolia	S. crassifolia	#	Kienast, Frank
107	Stellaria sp.	Stellaria sp.	#	Kienast, Frank
108	Taraxacum cf. ceratophorum	T. cf. ceratophorum	#	Kienast, Frank
109	Tephroseris palustris	T. palustris	#	Kienast, Frank
110	Thymus sp.	Thymus sp.	#	Kienast, Frank
111	Tripleurospermum hookeri	T. hookeri	#	Kienast, Frank
112	Vaccinium vitis-idaea	V. vitis-idaea	#	Kienast, Frank

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

2160 data points

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