Comparison of the climate during marine isotope stage 9 and 11 inferred from a speleothem isotope record from northern Norway

被引:20
作者
Berstad, IM
Lundberg, J
Lauritzen, SE
Linge, HC
机构
[1] Univ Bergen, Dept Geol, N-5007 Bergen, Norway
[2] Carleton Univ, Dept Geog & Environm Studies, Ottawa, ON K1S 5B6, Canada
关键词
Norway speleothem; oxygen isotopes; TIMS; quaternary; paleoclimate; MIS; 9; 11; 13; 15;
D O I
10.1006/qres.2002.2387
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
A stalagmite from northern Norway is dated with 12 thermal ionization mass spectrometry U-Th dates, and at least four separate growth periods are identified that correspond with marine isotope stages 9, 11, 13, and probably 15. The calcite is tested for isotopic equilibrium with the Hendy test. Oxygen isotope measurements on 231 subsamples on a vertical transect are used as a paleotemperature proxy. The detailed isotopic record from MIS 9 show apparent similarities to a Holocene record from the same cave, both in the climatic evolution and the overall temperatures: both show temperature oscillations changing from high-frequency, low-amplitude cycles in the beginning of the interglacial period to lower frequency, higher amplitude cycles in the later part of the interglacial period. The isotope record from MIS 11 shows a distinct isotopic event toward heavier values. The isotopic record together with the porous, humus-rich calcite are interpreted as indicating a warmer than present interglacial period with several episodes of heavy rainfall. (C) 2002 University of Washington.
引用
收藏
页码:361 / 371
页数:11
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