Middle to Late Paleozoic Atmospheric CO2 Levels from Soil Carbonate and Organic Matter

  title={Middle to Late Paleozoic Atmospheric CO2 Levels from Soil Carbonate and Organic Matter},
  author={C. Mora and S. Driese and L. A. Colarusso},
  pages={1105 - 1107}
The stable carbon isotope compositions of ancient soil carbonate and coexisting soil organic matter indicate that atmospheric CO2 levels decreased by a factor of 10 during the middle to late Paleozoic era. Proxy measurements of CO2 were made by application of a soil carbonate CO2 paleobarometer to a suite of paleosols that share key physical and chemical characteristics. The estimates agree with theoretical models that imply that a decrease in Paleozoic atmospheric CO2 levels was associated… Expand
CO2-Forced Climate and Vegetation Instability During Late Paleozoic Deglaciation
Major restructuring of paleotropical flora in western Euramerica occurred in step with climate and pCO2 shifts, illustrating the biotic impact associated with past CO2-forced turnover to a permanent ice-free world. Expand
Carbon isotopic evidence for organic matter oxidation in soils of the Old Red Sandstone (Silurian to Devonian, South Wales, UK)
Petrographic and calcrete carbon isotope data from seasonally waterlogged Upper Silurian (Přídolí) to Lower Devonian (Pragian) palaeo-Vertisols of the Old Red Sandstone, South Wales, UK, areExpand
An integrated model for soil organic carbon and CO2: Implications for paleosol carbonate pCO2 paleobarometry
[1] The geologic history of atmospheric CO2 concentration (CAtm) is relevant to studies of paleoclimate, paleobiology, and elemental cycling at the Earth's surface. Here we present a model thatExpand
Carbon isotope evidence implying high O2/CO2 ratios in the Permo-Carboniferous atmosphere
Abstract Theoretical models predict a marked increase in atmospheric O2 to ∼35% during the Permo-Carboniferous (∼300 Ma) occurring against a low (∼0.03%) CO2 level. An upper O2 value of 35%, however,Expand
Early Forest Soils and Their Role in Devonian Global Change
From Silurian into Devonian time, red clayey calcareous paleosols show a greater volume of roots and a concomitant decline in the density of animal burrows, which parallel the decline in atmospheric carbon dioxide determined from isotopic records of pedogenic carbonate in these same paleosol. Expand
Implications for Late Holocene climate from stable carbon and oxygen isotopic variability in soil and land snail shells from archaeological site 41KM69 in Texas, USA
Abstract Well-preserved fossil land snail shell collected in a 115 cm soil profile from archaeological site 41KM69 in Texas, USA, minimally span the past 2200 years and provide an opportunity toExpand
The Paleozoic to Mesozoic carbon cycle revisited: The carbon isotopic composition of terrestrial organic matter
[1] Two thousand one hundred forty-eight carbon isotope values for terrestrial organic matter (plant fossils, coal, bulk terrestrial organic matter) provide a proxy record for temporal changes in theExpand
Estimating soil pCO2 using paleosol carbonates: implications for the relationship between primary productivity and faunal richness in ancient terrestrial ecosystems
Abstract In this paper we present a method for estimating soil pCO2 in ancient environments using the measured carbon-isotope values of pedogenic carbonates and plant-derived organic matter. TheExpand
δ13C depth profiles from paleosols across the Permian-Triassic boundary: Evidence for methane release
Stable carbon isotopic analyses of organic carbon (δ 13 C) in individual paleosol profiles from Permian–Triassic sequences of Antarctica reveal systematic isotopic variations with profile depth.Expand
The destruction of paleoclimatic isotopic signals in Pleistocene carbonate soil nodules of Western Australia
Stable carbon and oxygen isotopic analyses were conducted on small (<10 mm), spherical Pleistocene carbonate soil nodules from 53 different levels in a 9.15-m soil auger collected in northern WesternExpand


Paleozoic Atmospheric CO2: Importance of Solar Radiation and Plant Evolution
  • R. Berner
  • Environmental Science, Medicine
  • Science
  • 1993
Changes in solar radiation, as it affects the rate of weathering of silicates on the continents, and other changes involving weathering and the degassing of carbon dioxide have been included in a long-term carbon-cycle model, indicating that variations in the atmospheric greenhouse effect were important in global climate change during the distant geologic past. Expand
Phanerozoic atmospheric reconstructions: a terrestrial perspective
Abstract The Paleozoic stands out in geochemical reconstructions as a time of unusually high organic carbon burial and disturbed O2 and CO2 regimes. The anomaly is apparently of terrestrial origin.Expand
The post-Paleozoic chronology and mechanism of 13C depletion in primary marine organic matter.
It is shown that the decreased isotopic fractionation between marine carbonates and organic matter from the Early to mid-Cenozoic may record variations in the abundance of atmospheric CO2. Expand
The stable isotopic composition of modern soil carbonate and its relationship to climate
The oxygen isotopic composition of modern soil carbonate is well correlated with the isotopic composition of local meteoric water. The carbon isotopic cycle for CO 2 in soils can be described inExpand
Carbon isotopes in soils and palaeosols as ecology and palaeoecology indicators
THERE are few quantitative techniques in use today for palaeoecological reconstruction in terrestrial depositional systems. One approach to such reconstructions is to estimate the proportion of C3 toExpand
Changes in carbon isotope ratios in the late Permian recorded in therapsid tooth apatite
THE end of the Permian witnessed global extinctions of marine and terrestrial fauna1. As marine biogenic carbonate and atmospheric carbon dioxide are in long-term isotopic equilibrium, changes inExpand
Burial of organic carbon and pyrite sulfur in sediments over phanerozoic time: a new theory
In present day marine sediments, almost all of which are deposited in normal oxygenated seawater, rates of burial of organic carbon (C) and pyrite sulfur (S) correlate positively and bear a constantExpand
Systematic variations in the carbon and oxygen isotopic composition of pedogenic carbonate along elevation transects in the southern Great Basin, United States
Stable carbon- and oxygen-isotope variations in Holocene soil carbonates that formed in the unsaturated zone were examined along several elevation transects in the southern Great Basin, UnitedExpand
Paleopedology and Stable Isotope Chemistry of Late Silurian Vertic Paleosols, Bloomsburg Formation, Central Pennsylvania
ABSTRACT Paleosols with vertic (Vertisol-like) features occur in repetitively stacked fining-upward sequences bounded by marine erosional surfaces in the Bloomsburg Formation (Ludlovian to Pridolian)Expand
Geocarb III: A Revised Model of Atmospheric CO2 over Phanerozoic Time
Revision of the GEOCARB model (Berner, 1991, 1994) for paleolevels of atmospheric CO2, has been made with emphasis on factors affecting CO2 uptake by continental weathering. This includes: (1) newExpand