LS09BAUM01a: corrected calibrated age values in chronData table

d18O (LS09BAUM01a): interpretation4_scope: '' has been replaced by 'isotope'

Baker, Paul A. , Fritz, Sherilyn C. , Burns, Stephen J. , Ekdahl, Erik , Rigsby, Catherine A.

Baker, P. A., Fritz, S. C., Burns, S. J., Ekdahl, E. and Rigsby, C. A.: The Nature and Origin of Decadal to Millennial Scale Climate Variability in the Southern Tropics of South America: The Holocene Record of Lago Umayo, Peru, Developments in Paleoenvironmental Research, 301–322, doi:10.1007/978-90-481-2672-9_13, 2009.

Past Climate Variability in South America and Surrounding Regions

The Nature and Origin of Decadal to Millennial Scale Climate Variability in the Southern Tropics of South America: The Holocene Record of Lago Umayo, Peru

Automated Finnigan CarboFlo system, interfaced with Finnigan MAT Delta-plus MS

check if chronology and/or sensor integration time. integrationTime "uncertainty type" given but no time. (GF)

check if chronology and/or sensor integration time.

The oxygen isotope composition of ostracod carapaces depends primarily on the d18O composition of the water and the tempera- ture at which carbonates precipitate (Craig, 1965; Stuiver, 1970). In tropical, closed-basin lakes within seasonally dry climates, the d18O value of lake water is controlled primarily by the evaporation to precipitation ratio (E/P) of the lake (Fontes and Gonfiantini, 1967; Gasse et al., 1990). During periods of increased (decreased) E/P ratios, the d18O value of lake water will go up (down) as kinetic fractionation processes lead to an increase (decrease) in concen- trations of 18O relative to 16O. Assuming that long-term tempera- ture changes in the tropics are less likely to affect d18O values in the lake than are changes in the E/P ratio (Covich and Stuiver, 1974; Curtis and Hodell, 1993), the d18O value of ostracod carapaces should indicate variations in the E/P ratio of the lake.

year (MATc70ccaf62a): interpretation4_scope: '' has been replaced by 'climate'
depth (MATe2774c7128): interpretation4_scope: '' has been replaced by 'climate'