Results 11 to 20 of about 105,636 (305)

Anomalous negative excursion of carbon isotope in organic carbon after the last Paleoproterozoic glaciation in North America [PDF]

, 2010
Early Paleoproterozoic time (2.5–2.0 Ga) spanned a critical phase in Earth's history, characterized by repeated glaciations and an increase in atmospheric oxygen (the Great Oxidation Event (GOE)).
Bekker, Bekker, Bekker, Bekker, Clayton, Dutkiewicz, Eigenbrode, Eiichi Tajika, Evans, Gair, Hayes, Hayes, Hayes, Holland, Joseph L. Kirschvink, Karhu, Kazuhisa Goto, Kirschvink, Kohonen, Long, Marmo, McLennan, Nanako O. Ogawa, Naohiko Ohkouchi, Ogawa, Ohkouchi, Ojakangas, Ojakangas, Ojakangas, Papineau, Pavlov, Rainbird, Rasmussen, Ryuji Tada, Schoell, Shinji Yamamoto, Vallini, Yasuhito Sekine, Young, Young, Young, Young   +41 more
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Evidence of late Quaternary environmental change in a continental east Antarctic lake from lacustrine sedimentary pigment distributions [PDF]

, 2005
A sediment core from Progress Lake, one of the oldest lacustrine sequences in East Antarctica, contains distinct zones dating from a previous interglacial (most likely Marine Isotope Stage 5e, c.
Hodgson, D A, Keely, B J, Squier, A H
core   +2 more sources

Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales [PDF]

, 2017
The mineralogical and chemical compositions of Lower Carboniferous (Tournaisian) marine black shale from the Kowala quarry, the Holy Cross Mountains, Poland, were investigated.
Agnieszka Pisarzowska, Algeo, Algeo, Algeo, Allan, Altabet, Altabet, Anbar, Anthony S. Cohen, Arkadiusz Derkowski, Arnold, Arthur, Averbuch, Baker, Barling, Bauersachs, Behar, Berkowski, Berner, Bolton, Bond, Brantley, Brumsack, Chadima, Chen, Clayton, Clayton, Dalai, Derkowski, Dias, Dickson, Duan, Erickson, Faure, Franke, Freudenthal, Frimmel, Georgiev, German, Goldberg, Gong, Grosjean, Hannigan, Hatch, Helz, Huerta-Diaz, Immenhauser, Jaffe, Jan Środoń, Joachimski, Jones, Keller, Kolowith, Kump, Landais, Lehmann, Leszek Marynowski, Lev, Leythaeuser, Liermann, Littke, Liu, Lo, Lyons, Ma, Macko, Macko, Marynowski, Marynowski, Marynowski, Marynowski, Marynowski, Marynowski, McArthur, McCarty, Michał Rakociński, Morford, Mort, Möbius, Nägler, Obreht, Pearce, Pearce, Perkins, Petsch, Peucker-Ehrenbrink, Pollack, Pope, Popp, Popp, Poulson, Pujol, Rachidi, Racka, Racki, Racki, Rafał Szaniawski, Reitz, Rimmer, Rimmer, Riquier, Rooney, Ross, Rudnick, Sachs, Sackett, Saino, Schmitz, Schoepfer, Siebert, Siebert, Slomp, Szaniawski, Szaniawski, Szulczewski, Tamamura, Torsvik, Tribovillard, Tribovillard, Tulipani, Tuttle, Wignall, Wildman, Williams, Yu, Zwing, Śliwiński, Środoń, Środoń   +128 more
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Characteristics of stable carbon isotopic composition of shale gas

Journal of Natural Gas Geoscience, 2016
A type Ⅱ kerogen with low thermal maturity was adopted to perform hydrocarbon generation pyrolysis experiments in a vacuum (Micro-Scale Sealed Vessel) system at the heating rates of 2 °C/h and 20 °C/h.
Zhenya Qu, Jianan Sun, Jianting Shi, Zhaowen Zhan, Yanrong Zou, Ping'an Peng   +5 more
doaj   +1 more source

High-temporal resolution fluvial sediment source fingerprinting with uncertainty: a Bayesian approach [PDF]

, 2014
This contribution addresses two developing areas of sediment fingerprinting research. Specifically, how to improve the temporal resolution of source apportionment estimates whilst minimizing analytical costs and, secondly, how to consistently quantify ...
Acornley, Agency, Bilotta, Blake, Boardman, Buchanan, Collins, Collins, Collins, Collins, Cooper, D'Haen, Dutton, Egozcue, Evans, Evrard, Evrard, Fox, Gellis, Gruszowski, Hancock, Hilton, Hiscock, Hiscock, Hopkins, Horowitz, House, Huisman, Jobbágy, Kim, Krueger, Lefrançois, Legout, Lewis, Martínez-Carreras, Martínez-Carreras, Massoudieh, Matsumoto, Meteorological Office, Motha, Navratil, Olley, Owens, Palmer, Parnell, Parnell, Phillips, Plummer, Poulenard, Poulenard, Pretty, R Development Core Team, Rawlins, Rawlins, Rowan, Russell, Schindler Wildhaber, Sear, Semmens, Slimane, Small, Smith, Smith, Smith, Theuring, Thompson, Thompson, Tremblay, Walling, Walling, Wilkinson, Williams   +71 more
core   +1 more source

Influence of hydrodynamic processes on the fate of sedimentary organic matter on continental margins [PDF]

, 2018
Understanding the effects of hydrodynamic forcing on organic matter (OM) composition is important for assessment of organic carbon (OC) burial in marginal seas on regional and global scales.
Aller, Aller, Arnarson, Bao, Bao, Bauer, Bianchi, Bianchi, Bianchi, Blair, Blair, Blair, Bröder, Burdige, Burdige, Cameron McIntyre, Canuel, Cartapanis, Cathalot, Chen, Coppola, Cui, Daniel B. Montluçon, Drenzek, Eglinton, Galy, Gao, Goñi, Griffith, Guo, Harris, Hedges, Hilton, Hilton, Hwang, Inthorn, Kao, Keil, Keil, Kusch, Kusch, Leithold, Li, Lie, Liu, Liu, Liu, Liu, Luo, Marwick, Mayer, McCave, McCave, McCave, Meixun Zhao, Milliman, Mollenhauer, Mollenhauer, Mollenhauer, Mollenhauer, Mollenhauer, Mollenhauer, Muller-Karger, Nuwer, Ohkouchi, Pawlowicz, Pedrosa-Pàmies, Qiao, Rui Bao, Saito, Shah, Stuiver, Su, Tao, Tao, Tesi, Tesi, Tesi, Tesi, Tessa S. van der Voort, Thomsen, Thomsen, Timothy I. Eglinton, Voort, Wagner, Wakeham, Wang, Wang, Wang, Wang, Wang, Wang, Wu, Xinyu Guo, Xu, Yang, Yang, Yang, Yang, Yao, Yao, Zhu, Zonneveld   +102 more
core   +1 more source

Formation of secondary aerosols from gasoline vehicle exhaust when mixing with SO₂ [PDF]

Atmospheric Chemistry and Physics, 2016
Sulfur dioxide (SO2) can enhance the formation of secondary aerosols from biogenic volatile organic compounds (VOCs), but its influence on secondary aerosol formation from anthropogenic VOCs, particularly complex mixtures like vehicle exhaust, remains
T. Liu, T. Liu, X. Wang, Q. Hu, W. Deng, W. Deng, Y. Zhang, X. Ding, X. Fu, X. Fu, F. Bernard, F. Bernard, Z. Zhang, Z. Zhang, S. Lü, S. Lü, Q. He, Q. He, X. Bi, J. Chen, Y. Sun, J. Yu, P. Peng, G. Sheng, J. Fu   +24 more
doaj   +1 more source

Concentration, source identification, and exposure risk assessment of PM2.5-bound parent PAHs and nitro-PAHs in atmosphere from typical Chinese cities

Scientific Reports, 2017
Sixteen parent PAHs and twelve nitro-PAHs were measured in PM2.5 samples collected over one year (2013–2014) at nine urban sites in China. During the sampling period, concentrations of individual nitro-PAHs were one or two orders of magnitude lower than ...
Di Liu, Tian Lin, Jabir Hussain Syed, Zhineng Cheng, Yue Xu, Kechang Li, Gan Zhang, Jun Li   +7 more
doaj   +1 more source

Design and characterization of a smog chamber for studying gas-phase chemical mechanisms and aerosol formation [PDF]

Atmospheric Measurement Techniques, 2014
We describe here characterization of a new state-of-the-art smog chamber facility for studying atmospheric gas-phase and aerosol chemistry. The chamber consists of a 30 m3 fluorinated ethylene propylene (FEP) Teflon film reactor housed in a temperature ...
X. Wang, T. Liu, F. Bernard, X. Ding, S. Wen, Y. Zhang, Z. Zhang, Q. He, S. Lü, J. Chen, S. Saunders, J. Yu   +11 more
doaj   +1 more source

Selective organic matter preservation in "burn-down" turbidites on the Madeira Abyssal Plain [PDF]

, 2003
Oxidized intervals of five organic-rich Madeira Abyssal Plain (MAP) turbidites deposited during the Miocene, Pliocene, and Pleistocene all displayed comparable major loss of total organic carbon (TOC) (84 ± 3.1%) accompanied by a negative isotopic (δ13C)
Benner, Bidigare, Bidigare, Brassell, Buckley, Collister, Cowie, Cowie, de Lange, de Lange, de Lange, de Lange, de Lange, de Leeuw, de Leeuw, Degens, F. G. Prahl, G. J. De Lange, G. L. Cowie, Gelin, Goericke, Goosens, Grimalt, Hartnett, Hatcher, Hayes, Hedges, Hoefs, Hoefs, Hoefs, Huang, Jasper, Keil, Laws, Laws, M. A. Sparrow, Muller, Popp, Prahl, Prahl, Prahl, Prahl, Prahl, Suess, Thomson, Versteegh, Wakeham, Wakeham, Wilson, Zonneveld   +49 more
core   +2 more sources