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Artykuły w czasopismach na temat "PCO2 proxies"
Badger, Marcus P. S., Thomas B. Chalk, Gavin L. Foster, Paul R. Bown, Samantha J. Gibbs, Philip F. Sexton, Daniela N. Schmidt, Heiko Pälike, Andreas Mackensen i Richard D. Pancost. "Insensitivity of alkenone carbon isotopes to atmospheric CO<sub>2</sub> at low to moderate CO<sub>2</sub> levels". Climate of the Past 15, nr 2 (27.03.2019): 539–54. http://dx.doi.org/10.5194/cp-15-539-2019.
Pełny tekst źródłaDupont, Lydie M., Thibaut Caley i Isla S. Castañeda. "Effects of atmospheric CO<sub>2</sub> variability of the past 800 kyr on the biomes of southeast Africa". Climate of the Past 15, nr 3 (19.06.2019): 1083–97. http://dx.doi.org/10.5194/cp-15-1083-2019.
Pełny tekst źródłaSchwemmer, T. G., H. Baumann, C. S. Murray, A. I. Molina i J. A. Nye. "Acidification and hypoxia interactively affect metabolism in embryos, but not larvae, of the coastal forage fish Menidia menidia". Journal of Experimental Biology 223, nr 22 (12.10.2020): jeb228015. http://dx.doi.org/10.1242/jeb.228015.
Pełny tekst źródłaWitkowski, Caitlyn R., Sylvain Agostini, Ben P. Harvey, Marcel T. J. van der Meer, Jaap S. Sinninghe Damsté i Stefan Schouten. "Validation of carbon isotope fractionation in algal lipids as a <i>p</i>CO<sub>2</sub> proxy using a natural CO<sub>2</sub> seep (Shikine Island, Japan)". Biogeosciences 16, nr 22 (25.11.2019): 4451–61. http://dx.doi.org/10.5194/bg-16-4451-2019.
Pełny tekst źródłaLi, Xianghui, Jingyu Wang, Troy Rasbury, Min Zhou, Zhen Wei i Chaokai Zhang. "Early Jurassic climate and atmospheric CO<sub>2</sub> concentration in the Sichuan paleobasin, southwestern China". Climate of the Past 16, nr 6 (4.11.2020): 2055–74. http://dx.doi.org/10.5194/cp-16-2055-2020.
Pełny tekst źródłaThomsen, J., M. A. Gutowska, J. Saphörster, A. Heinemann, K. Trübenbach, J. Fietzke, C. Hiebenthal i in. "Calcifying invertebrates succeed in a naturally CO<sub>2</sub> enriched coastal habitat but are threatened by high levels of future acidification". Biogeosciences Discussions 7, nr 4 (2.07.2010): 5119–56. http://dx.doi.org/10.5194/bgd-7-5119-2010.
Pełny tekst źródłaThomsen, J., M. A. Gutowska, J. Saphörster, A. Heinemann, K. Trübenbach, J. Fietzke, C. Hiebenthal i in. "Calcifying invertebrates succeed in a naturally CO<sub>2</sub>-rich coastal habitat but are threatened by high levels of future acidification". Biogeosciences 7, nr 11 (26.11.2010): 3879–91. http://dx.doi.org/10.5194/bg-7-3879-2010.
Pełny tekst źródłaNoonan, Sam H. C., i Katharina E. Fabricius. "Ocean acidification affects productivity but not the severity of thermal bleaching in some tropical corals". ICES Journal of Marine Science 73, nr 3 (22.07.2015): 715–26. http://dx.doi.org/10.1093/icesjms/fsv127.
Pełny tekst źródłaSigwart, Julia D., Gillian Lyons, Artur Fink, Magdalena A. Gutowska, Darren Murray, Frank Melzner, Jonathan D. R. Houghton i Marian Yong-an Hu. "Elevated pCO2 drives lower growth and yet increased calcification in the early life history of the cuttlefish Sepia officinalis (Mollusca: Cephalopoda)". ICES Journal of Marine Science 73, nr 3 (29.10.2015): 970–80. http://dx.doi.org/10.1093/icesjms/fsv188.
Pełny tekst źródłaHu, Jin-Jin, Yao-Wu Xing, Tao Su, Yong-Jiang Huang i Zhe-Kun Zhou. "Stomatal frequency of Quercus glauca from three material sources shows the same inverse response to atmospheric pCO2". Annals of Botany 123, nr 7 (12.03.2019): 1147–58. http://dx.doi.org/10.1093/aob/mcz020.
Pełny tekst źródłaRozprawy doktorskie na temat "PCO2 proxies"
Barker, S. "Planktonic foraminiferal proxies for temperature and pCO2". Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596364.
Pełny tekst źródłaGodbillot, Camille. "Réponse biogéochimique des coccolithes du Pléistocène aux variations de pCO2". Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS140.
Pełny tekst źródłaResults from both in vivo cultures and cell modelling biogeochemical studies have demonstrated a link between the biological fractionation of coccoliths and the CO2 concentration of the living environment of their producers, the coccolithophores. These results have encouraged the use of coccolith vital effects as proxies for the levels of CO2 in the medium. However, a number of biases hinder the application of the empirical calibrations from culture experiments to natural coccolith populations. This work aims at formalizing the transfer function linking the vital effects to the [CO2aq] in natural environments, to be used for the reconstruction of past pCO2. To this end, we use the records from Antarctic ice cores to quantify the forcing of pCO2 on the magnitude of the coccoliths’ vital effects. We evidence, and discuss, a control of CO2 concentrations on the isotopic difference (Δδ18O, Δδ13C) between coccoliths of different sizes produced during the penultimate glacial termination (130-140 ka). The second part of this thesis is dedicated to applying the transfer function to coccoliths from the Mid-Pleistocene Transition (800-1250 ka), a key period of climate change for which pCO2 variations are not documented. The pCO2 record we obtain, which covers the entire transition, exhibits self-consistent amplitudes and variations, thus giving credit to the calibration we present. Our record supports the hypothesis of an increased sensitivity of ice sheets to the radiative forcing of CO2 since the MPT
Plancq, Julien. "Identification des producteurs d’alcénones dans le registre sédimentaire du Cénozoïque : implications pour l’utilisation des proxys de paléo-température (UK’ 37) et de paléo-pCO2 (ɛp37 : 2)". Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10037/document.
Pełny tekst źródłaAlkenones have been widely used as proxies for the reconstruction of sea surface temperatures and of partial pressure of CO2 (pCO2) in ancient periods. In modern oceans, these long-chain ketones are mainly produced by the coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica. However, there is a huge gap between the first record of alkenonesin the Cretaceous (~120 Ma) and the first occurrence of the modern alkenone producers (< 2Ma). Thus, it seems crucial to identify ancient alkenone producers to ensure the applicability of environmental proxies based on these biomarkers in pre-Quaternary sediments. In this PhD thesis, three case studies are considered corresponding to key periods in the evolution history of the Noelaerhabdaceae family, which includes the Cenozoic ancestors of modern alkenone producers. The comparison between alkenone contents (distribution and concentrations) andNoelaerhabdaceae species-specific relative and absolute abundances in marine sedimentsdating back to the Eocene-Oligocene (35-31 Ma), the Oligocene-Miocene (25-16 Ma) and thelate Pliocene (3.6-2.6 Ma) shows that, contrary to common assumptions, Reticulofenestra was not the only genus responsible for alkenone production during the Cenozoic. Results also underscore the importance of a careful identification of alkenone producers and of their cellsize for pCO2 reconstructions for pre-Quaternary periods. On the contrary, the identificationof producers does not seem essential to obtain consistent paleo-temperature estimates
Części książek na temat "PCO2 proxies"
Knoll, Andrew H., i Woodward W. Fischer. "Skeletons and Ocean Chemistry: The Long View". W Ocean Acidification. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199591091.003.0009.
Pełny tekst źródłaStreszczenia konferencji na temat "PCO2 proxies"
Zhu, Lu, Neil J. Tabor i Neil J. Tabor. "EARLY PERMIAN ATMOSPHERIC pCO2 ESTIMATES AND REPRODUCIBILITY OF PALEOSOLS AS ISOTOPIC PROXIES FOR PALEOCLIMATE, EASTERN SHELF OF THE MIDLAND BASIN, NORTH-CENTRAL TEXAS". W 54th Annual GSA South-Central Section Meeting 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020sc-343559.
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