Finnish supra-long tree-ring chronology extended to 5634 BC

被引:43
作者
Helama, Samuli [1 ]
Mielikainen, Kari [2 ]
Timonen, Mauri [3 ]
Eronen, Matti [1 ]
机构
[1] Univ Helsinki, Dept Geol, FI-00014 Helsinki, Finland
[2] Finnish Forest Res Inst, Vantaa Res Unit, FI-01301 Vantaa, Finland
[3] Finnish Forest Res Inst, Rovaniemi Res Unit, FI-96301 Rovaniemi, Finland
关键词
dendrochronology; Lapland; megafossil; palaeoclimatology; Scots pine;
D O I
10.1080/00291950802517593
中图分类号
P9 [自然地理学]; K9 [地理];
学科分类号
0705 ; 070501 ;
摘要
Dendrochronological crossdating was used to expand a pre-existing multi-millennial tree-ring chronology for Finnish Lapland. Twelve tree-ring series from sedimentary archives of five small lakes contributed to the oldest part of the chronology, extending the record to 5634 BC (previously 5520 BC). Today, the chronology is the longest conifer tree-ring chronology in Eurasia. The geologically oldest pine megafossils were found the eastern part of the region, i.e. north-east Finnish Lapland, and this is also where the authors expect that other very old pine megafossils may be found in the future. Cool climatic conditions c.8 ka ago may have prevented pine regeneration in the tundra-forest ecotone. This may explain the practical difficulty of making the chronology longer than its present form in the study region.
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页码:271 / 277
页数:7
相关论文
共 70 条
[51]  
2
[52]  
MIKOLA P., 1950, COMMUN INST FOREST FENNIAE, V38, P1
[53]  
MONSERUD RA, 1986, FOREST SCI, V32, P349
[54]  
MONSERUD RA, 1989, J ARCHAEOL SCI, V16, P221
[55]  
Munro M. A. R., 1984, Tree-Ring Bulletin, V44, P17
[56]   The effect of temperature on the radial growth of Scots pine in northernmost Fennoscandia [J].
Nöjd, P ;
Hari, P .
FOREST ECOLOGY AND MANAGEMENT, 2001, 142 (1-3) :65-77
[57]   Centennial-to-millennial fluctuations in July temperatures in North Finland as recorded by timberline tree rings of Scots pine [J].
Ogurtsov, M ;
Helama, S ;
Eronen, M ;
Lindholm, M .
QUATERNARY RESEARCH, 2005, 63 (02) :182-188
[58]  
ORTON CR, 1983, B U LOND I ARCHAEOL, V20, P101
[59]  
Osborn T. J., 1997, Dendrochronologia, V15, P89
[60]   Centennial-scale climate cooling with a sudden cold event around 8,200 years ago [J].
Rohling, EJ ;
Pälike, H .
NATURE, 2005, 434 (7036) :975-979