The Dole Effect and its variations during the last 130,000 years as measured in the Vostok Ice Core

Global Biogeochemical Cycles - Tập 8 Số 3 - Trang 363-376 - 1994
Michael L. Bender1, Todd Sowers1, Laurent D Labeyrie2
1URI - University of Rhode Island (45 Upper College Rd, Kingston, RI 02881, USA - États-Unis)
2Centre des Faibles Radioactivités (91190 Gif sur Yvette - France)

Tóm tắt

We review the current understanding of the Dole effect (the observed difference between the δ18O of atmospheric O2 and that of seawater) and its causes, extend the record of variations in the Dole effect back to 130 kyr before present using data on the δ18O of O2 obtained from studying the Vostok ice core (Sowers et al., 1993), and discuss the significance of temporal variations. The Dole effect reflects oxygen isotope fractionation during photosynthesis, respiration, and hydrologic processes (evaporation, precipitation, and evapotranspiration). Our best prediction of the present‐day Dole effect, +20.8‰, is considerably lower than the observed value, +23.5‰, and we discuss possible causes of this discrepancy. During the past 130 kyr, the Dole effect has been 0.05‰ lower than the present value, on average. The standard deviation of the Dole effect from the mean has been only ±0.2‰, and the Dole effect is nearly unchanged between glacial maxima and interglacial periods. The small variability in the Dole effect suggests that relative rates of primary production in the land and marine realms have been relatively constant. Most periodic variability in the Dole effect is in the precession band, suggesting that changes in this global biogeochemical term reflects variations in low‐latitude land hydrology and productivity or possibly variability in low‐latitude oceanic productivity.

Từ khóa


Tài liệu tham khảo

10.1038/362527a0

10.1029/91PA01630

10.1029/JC095iC12p22243

10.1038/318349a0

10.4319/lo.1984.29.3.0620

10.1007/978-1-4899-0762-2_23

10.1029/JC093iC12p15701

10.1029/GB003i003p00215

10.1038/345127a0

10.1029/91PA02477

10.1029/PA005i002p00109

10.1126/science.241.4869.1043

10.1016/0168-1923(91)90002-8

Craig H. L.Gordon Deuterium and oxygen‐18 variation in the ocean and marine atmosphereConference on Stable Isotopes in OceanographyInternational Atomic Energy AgencyPisa 1965.

10.1126/science.242.4886.1675

10.1016/0016-7037(54)90016-2

10.1007/BF01323191

10.1007/BF01323099

10.1029/92PA00181

10.1073/pnas.85.6.1727

10.1007/BF00386231

10.1038/363439a0

10.1007/BF01323264

10.1007/BF01323459

10.1111/j.1600-0889.1989.tb00130.x

10.1007/BF00392616

Guy R. D., 1992, Biochemical and Physiological Aspects of Plant Respiration, 443

10.1104/pp.101.1.37

10.1016/0012-821X(85)90069-X

10.1029/92PA02253

10.1029/GM055p0165

10.1038/358723a0

10.1029/93GB01444

10.1029/JD089iD03p04629

Kroopnick P. M., 1987, Geosecs Atlantic, Pacific, and Indian Ocean Expeditions: Shorebased Data and Graphics, 3

10.1126/science.175.4017.54

10.1016/0012-821X(76)90078-9

10.1126/science.123.3197.574

10.1038/335529a0

10.1038/355812a0

Malaize Bruno and thesis.

10.1038/357461a0

10.1029/JB087iB06p04807

10.1029/PA004i001p00019

Meyer M. K. Net primary productivity estimates for the last 18 000 years evaluated from simulations by a global climate model M. S. dissertation Univ. of Wis.Madison 1988.

10.1038/337541a0

Mix A., 1989, Productivity of the Ocean: Present and Past

10.1126/science.249.4970.766

10.1038/331609a0

10.1029/91PA02532

10.1029/JD092iD07p08411

10.1029/PA003i003p00361

10.1144/GSL.SP.1992.064.01.27

10.1029/91GL00022

10.1029/GM032p0303

10.1029/91PA02023

10.1029/93PA02328

10.1104/pp.56.1.126

10.1029/91GL00121

10.1029/92PA00278

10.1038/350053a0

10.1029/93JD00565

10.1016/0016-7037(89)90147-6

10.1029/90GL02478

10.1007/BF01323265

Thông tin
Thông tin xuất bản

Global Biogeochemical Cycles

Tập 8 Số 3

363-376

Thông tin tác giả