16°C rapid temperature variation in Central Greenland 70,000 years ago

被引:142
作者
Lang, C
Leuenberger, M
Schwander, J
Johnsen, S
机构
[1] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland
[2] Univ Copenhagen, Dept Geophys, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[3] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland
关键词
D O I
10.1126/science.286.5441.934
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Variations in the (29)N(2)/(28)N(2) ratio of air bubbles trapped in polar ice cores and their relation to variations of the (18)O/(16)O Of th, ice allow past surface temperature variations and ice age-gas age differences to be determined. High-resolution measurements of (29)N(2)/(28)N(2) in Dansgaard-Oeschger event 19 (around 70,000 years before the present) in ice from Central Greenland show that at the beginning of the event, the ice age-gas age difference was 1090 +/- 100 years. With the use of a combined firn densification, temperature, and gas diffusion model, the delta(18)O(ice)-temperature coefficient alpha was determined to be 0.42 +/- 0.05 per mil per kelvin. This coefficient implies a mean surface temperature change of 16.0 kelvin (between 14.3 and 18.1 kelvin), which differs substantially from values derived from borehole temperatures and modern spatial delta(18)O(ice)-surface temperature correlations.
引用
收藏
页码:934 / 937
页数:4
相关论文
共 37 条
[1]   Variability of the North Atlantic thermohaline circulation during the last interglacial period [J].
Adkins, JF ;
Boyle, EA ;
Keigwin, L ;
Cortijo, E .
NATURE, 1997, 390 (6656) :154-156
[2]   Brief interstadial events in the Santa Barbara basin, NE Pacific, during the past 60 kyr [J].
Behl, RJ ;
Kennett, JP .
NATURE, 1996, 379 (6562) :243-246
[3]   INFLUENCE OF DISTRIBUTION OF ATOMIC MASSES WITHIN MOLECULE ON THERMAL DIFFUSION .1. ISOTOPIC CO AND N2 MOLECULES [J].
BOERSMAKLEIN, V ;
DEVRIES, AE .
PHYSICA, 1966, 32 (04) :717-+
[4]   Rapid variations in atmospheric methane concentration during the past 110,000 years [J].
Brook, EJ ;
Sowers, T ;
Orchardo, J .
SCIENCE, 1996, 273 (5278) :1087-1091
[5]  
Chapman S., 1970, The Mathematical Theory of Non-Uniform Gases, V3rd
[6]   SYNCHRONOUS CHANGES IN ATMOSPHERIC CH4 AND GREENLAND CLIMATE BETWEEN 40-KYR AND 8-KYR BP [J].
CHAPPELLAZ, J ;
BLUNIER, T ;
RAYNAUD, D ;
BARNOLA, JM ;
SCHWANDER, J ;
STAUFFER, B .
NATURE, 1993, 366 (6454) :443-445
[7]   Palaeoclimatology - Cool tropical punch of the ice ages [J].
Charles, C .
NATURE, 1997, 385 (6618) :681-+
[8]   Climate connections between the hemisphere revealed by deep sea sediment core ice core correlations [J].
Charles, CD ;
LynchStieglitz, J ;
Ninnemann, US ;
Fairbanks, RG .
EARTH AND PLANETARY SCIENCE LETTERS, 1996, 142 (1-2) :19-27
[9]   GRAVITATIONAL SEPARATION OF GASES AND ISOTOPES IN POLAR ICE CAPS [J].
CRAIG, H ;
HORIBE, Y ;
SOWERS, T .
SCIENCE, 1988, 242 (4886) :1675-1678
[10]   CALIBRATION OF THE DELTA-O-18 ISOTOPIC PALEOTHERMOMETER FOR CENTRAL GREENLAND, USING BOREHOLE TEMPERATURES [J].
CUFFEY, KM ;
ALLEY, RB ;
GROOTES, PM ;
BOLZAN, JM ;
ANANDAKRISHNAN, S .
JOURNAL OF GLACIOLOGY, 1994, 40 (135) :341-349