500,000-YEAR STABLE CARBON ISOTOPIC RECORD FROM DEVILS-HOLE, NEVADA

被引：58

作者：

COPLEN, TB ^{[1
]}

WINOGRAD, IJ ^{[1
]}

LANDWEHR, JM ^{[1
]}

RIGGS, AC ^{[1
]}

机构：

[1] US GEOL SURVEY,DENVER FED CTR,LAKEWOOD,CO 80225

来源：

SCIENCE | 1994年 / 263卷 / 5145期

关键词：

D O I：

10.1126/science.263.5145.361

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：

The record of carbon-13 (deltaC-13) variations in DH-11 vein calcite core from Devils Hole, Nevada, shows four prominent minima near glacial terminations (glacial-interglacial transitions) V to II. The deltaC-13 time series is inversely correlated with the DH-11 oxygen isotope ratio time series and leads it by as much as 7000 years. The deltaC-13 variations likely record fluctuations in the deltaC-13 of dissolved inorganic carbon of water recharging the aquifer. How such variations are transported 80 kilometers to Devils Hole without obliteration by water-rock reaction remains an enigma. The record may reflect (i) global variations in the deltaC-13 of atmospheric CO2 and, hence, the deltaC-13 of continental biomass or (ii) variations in extent and density of vegetation in the southern Great Basin. In the latter case, deltaC-13 minima at 414, 334, 246, and 133 thousand years ago mark times of maximum vegetation.

引用

页码：361 / 365

页数：5

共 47 条

[1] RELATIONSHIP BETWEEN CLIMATE AND VEGETATION AND THE STABLE CARBON ISOTOPE CHEMISTRY OF SOILS IN THE EASTERN MOJAVE DESERT, NEVADA [J].