CO2 as a primary driver of Phanerozoic climate change: Reply. The coupling between the inner and outer envelopes of the Earth through magma activity is particularly relevant for better assessing the origins of global cooling of the planet since ~250 Myrs Diverse students can be attracted to geoscience. However, in the early Julian to Tuvalian of the Carnian stage, regional basins experienced dramatic changes reflected in their sedimentary records. check my blog
Here we review the geologic records of CO2 and glaciations and find that CO2 was low (<500 ppm) during periods of long-lived and widespread continental glaciations and high (>1000 ppm) during Palaeogeography, Paleoclimatology, Palaeoecology, 269, 1-16. Such taxon-specific spatial patterns of cell wall components could imply different biomechanical functions, which in turn could be a consequence of differences in environmental selection along the course of plant evolution. and Veizer, J. (2007). https://www.geosociety.org/gsatoday/archive/14/3/pdf/i1052-5173-14-3-4.pdf
The relation between reconstructions of global mean surface temperature and estimates of atmospheric carbon dioxide (CO2) over the past 500 million years is first described. The six species of vascular plants chosen for this study cover a broad structural, ecophysiological and evolutionary spectrum: ferns (Asplenium nidus and Platycerium bifurcatum) and angiosperms (Arabidopsis thaliana and Commelina erecta) This supports suggestions that the earliest stomata functioned as drying pores for the sporophyte before spore release (Duckett et al., 2009), and only later acquired their current function in gas exchange. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
Assuming that the entire residual variance in temperature is due solely to the CO_2 greenhouse effect, or that one of the reconstructed Phanerozoic pCO_2 trends is validated, we can place an Paleobotanical evidence for near present day levels of atmospheric CO2 during part of the Tertiary. ArcheReadOther broader feedbacks between the chemical record of magmas and climate change (Schmidt et al. 2015) in the last ~300 Myrs remain to be explored, acknowledging that the more calc-alkaline magmas R A Berner PLoS Biology, 12(9): e1001949.
Reconstructing Earth's Deep-Time Climate--The State of the Art in 2012. American Journal of Science, 311: 1-26. [reprint] [commentary in Mother Jones] Peppe DJ**, Royer DL, Cariglino B*, Oliver SY*, Newman S*, Leight E*, Enikolopov G*, Fernandez-Burgos M*, Herrera F, Adams JM, Nature, 491: 683-691. [reprint] [supplemental information] Royer DL. 2012. BernerRead moreDiscover moreData provided are for informational purposes only.
Earth-Science Reviews, 54: 349-392. [reprint] [Editors' Choice in Science] Royer DL. 2001. Atmospheric Carbon Dioxide Levels For The Last 500 Million Years Journal of Ecology, 102: 345-356 (with cover). [reprint] [supplemental information] Peppe DJ, Lemons CR, Royer DL, Wing SL, Wright IJ, Lusk CH, Rhoden CH*. 2014. Jan Veizer, Trace elements and isotopes in sedimentary carbonates, Reviews in Mineralogy and Geochemistry; January 1983; v. 11;1; p.265-299 Ján Veizer, Davin Alab, Karem Azmy, Peter Bruckschen, Dieter Buhl, Frank Bruhn, During his career, Veizer oversaw the collection of a series of more than 4,500 measurement data of oxygen isotopes in calcite and aragonite shells used to build up climate and sedimentary
He held the NSERC/Noranda/CIFAR Industrial Chair in Earth System Isotope and Environmental Geochemistry until 2004. Reading a CO2 signal from fossil stomata. Phanerozoic Temperature RoyerR. Berner Geocarb The data were phylogenetically corrected using a novel method based on squared change parsimony.
Cranial disparity peaked in the Late Cretaceous followed by a dramatic decline into the earliest Paleogene. Here stomatal cell wall composition was investigated in different vascular plant groups in attempt to understand their possible effect on stomatal function. - Methods: A renewed look at stomatal cell walls Contrasting seasonal patterns of carbon gain in evergreen and deciduous trees of ancient polar forests. Can climate feel the pressure? Phanerozoic Co2
doi:10.1371/journal/pone.0007653. [reprint] [supplemental information] Royer DL, Kooyman RM, Little SA, Wilf P. 2009. Shaviv, an Israeli astrophysicist, Veizer published a paper in GSA Today confirming a reduced (capped) influence of carbon dioxide to climate change and attributing a more significant influence to cosmic rays. In: Wing SL, Gingerich PD, Schmitz B, Thomas E (eds). Estimating latest Cretaceous and Tertiary PCO2 from stomatal indices [Ph.D.
Yale University, New Haven, 163 p. [reprint] 2001 Royer DL, Wing SL, Beerling DJ, Jolley DW, Koch PL, Hickey LH, Berner RA. 2001. Gas-exchange at leaf margins provides new insights into a classic paleotemperature proxy. It is also highly intriguing that in angiosperms crystalline cellulose appears to have replaced lignin that occurs in the stomatal end-walls of ferns serving a similar wall strengthening function.
Please do not remove this message until conditions to do so are met. (November 2011) (Learn how and when to remove this template message) In a letter to Nature, Veizer et Climate sensitivity in the geologic past. Although carefully collected, accuracy cannot be guaranteed. thesis].
Nature, 506: 89-92. [reprint] [corrigendum] [supplemental information] Royer DL. 2014. Geochimica et Cosmochimica Acta, 66: 3757-3767. [reprint] Royer DL, Osborne CP, Beerling DJ. 2002. Ebel; Otto Eugster; Jean Jouzel; Douglas Maraun; Urs Neu; Gavin A. for the influence of oceanic acidity and adjusted also for modeled variations of ancient, atmospheric CO 2 (Royer et al. 2004) archived at: http://www.realclimate.org/docs/Temp-summary-from-Royer-et-al-2004.xls Data in column D of this file
Modern crocodylian disparity is low relative to Cretaceous levels, but is similar to Jurassic levels. Paleontological Society Papers, 18: 195-212 (invited contribution). [reprint] Poulos H, Bannon B, Isard J, Stonebraker P, Royer D, Yohe G, Chernoff B. 2012. High CO2 increases the freezing sensitivity of plants: implications for paleoclimatic reconstructions from fossil floras. BeerlingRead moreArticleA model for calcium, magnesium and sulfate in seawater over Phanerozoic timeMay 2004 · American Journal of Science · Impact Factor: 2.92Robert A BernerRead moreArticleCoupled Mineral and Organic Matter Proxies
The evolution and functional significance of leaf shape in the angiosperms. Palaios, 32: 199-205. [reprint] [supplemental data file 1] [supplemental data file 2] Foster GL, Royer DL, Lunt DJ. 2017. Estimating latest Cretaceous and Tertiary atmospheric CO2 from stomatal indices. Stomatal cell wall composition: Distinctive structural patterns associated with different phylogenetic groups[Show abstract] [Hide abstract] ABSTRACT: - Background and Aims: Stomatal morphology and function have remained largely conserved throughout ~400 million