Showing 1 - 20 results of 297 for search '"year"', query time: 0.08s Refine Results
  1. 1

    Life: the first two billion years by Knoll, Andrew H., Strauss, Justin V., Bergmann, Kristin

    Published 2018
    “…Archean (more than 2500 Ma) sedimentary rocks add at least a billion years to the recorded history of life, with sedimentological and biogeochemical evidence for life at 3500 Ma, and possibly earlier; phylogenetic and functional details, however, are limited. …”
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    100 Years of the Ocean General Circulation by Wunsch, Carl Isaac, Ferrari, Raffaele

    Published 2021
    “…The central change in understanding of the ocean circulation during the past 100 years has been its emergence as an intensely time-dependent, effectively turbulent and wave-dominated, flow. …”
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    700,000 years of tropical Andean glaciation by Rodbell, DT, Hatfield, RG, Abbott, MB, Chen, CY, Woods, A, Stoner, JS, McGee, D, Tapia, PM, Bush, M, Valero-Garcés, BL, Lehmann, SB, Mark, SZ, Weidhaas, NC, Hillman, AL, Larsen, DJ, Delgado, G, Katz, SA, Solada, KE, Morey, AE, Finkenbinder, M, Valencia, B, Rozas-Davila, A, Wattrus, N, Colman, SM, Bustamante, MG, Kück, J, Pierdominici, S

    Published 2023
    “…Here a piston core from Lake Junín in the uppermost Amazon basin provides the first, to our knowledge, continuous, independently dated archive of tropical glaciation spanning 700,000 years. We find that tropical glaciers tracked changes in global ice volume and followed a clear approximately 100,000-year periodicity. …”
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    A two-billion-year history for the lunar dynamo by Shuster, David L., Tikoo-Schantz, Sonia M, Suavet, Clement Romain, Wang, Huapei, Weiss, Benjamin P., Grove, Timothy L.

    Published 2018
    “…These data extend the known lifetime of the lunar dynamo by at least 1 billion years. Such a protracted history requires an extraordinarily long-lived power source like core crystallization or precession. …”
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  5. 5

    Rapid oxygenation of Earths atmosphere 2.33 billion years ago by Luo, Genming, Ono, Shuhei, Beukes, Nicolas J., Wang, David T., Xie, Shucheng, Summons, Roger E

    Published 2016
    “…These data precisely constrain the GOE to 2.33 billion years ago. The new data suggest that the oxygenation occurred rapidly—within 1 to 10 million years—and was followed by a slower rise in the ocean sulfate inventory. …”
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    Monsoon-driven Saharan dust variability over the past 240,000 years by Skonieczny, C., McGee, David, Winckler, G., Bory, A., Bradtmiller, L. I., Kinsley, Christopher William, Polissar, P. J., De Pol-Holz, R., Rossignol, L., Malaizé, B.

    Published 2020
    “…Reconstructions of past Saharan dust deposition in marine sediments provide foundational records of North African climate over time scales of 103 to 106 years. Previous dust records show primarily glacial-interglacial variability in the Pleistocene, in contrast to other monsoon records showing strong precessional variability. …”
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    Twelve thousand years of dust: the Holocene global dust cycle constrained by natural archives by Albani, S., Mahowald, N. M., Winckler, G., Anderson, R. F., Bradtmiller, L. I., Delmonte, B., François, R., Goman, M., Heavens, N. G., Hesse, P. P., Hovan, S. A., Kang, S. G., Kohfeld, K. E., Lu, H., Maggi, V., Mason, J. A., Mayewski, P. A., Miao, X., Otto-Bliesner, B. L., Perry, A. T., Pourmand, A., Roberts, H. M., Rosenbloom, N., Stevens, T., Sun, J., McGee, William David

    Published 2018
    “…Based on the data compilation, we used the Community Earth System Model to estimate the mass balance of and variability in the global dust cycle during the Holocene, with dust loads ranging from 17.2 to 20.8 Tg between 2000 and 10 000 years ago and with a minimum in the early to mid-Holocene (6000–8000 years ago).…”
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    Twelve thousand years of dust: the Holocene global dust cycle constrained by natural archives by Albani, S., Mahowald, N. M., Winckler, G., Anderson, R. F., Bradtmiller, L. I., Delmonte, B., François, R., Goman, M., Heavens, N. G., Hesse, P. P., Hovan, S. A., Kang, S. G., Kohfeld, K. E., Lu, H., Maggi, V., Mason, J. A., Mayewski, P. A., Miao, X., Otto-Bliesner, B. L., Perry, A. T., Pourmand, A., Roberts, H. M., Rosenbloom, N., Stevens, T., Sun, J., McGee, William David

    Published 2015
    “…Based on the data compilation, we used the Community Earth System Model to estimate the mass balance of and variability in the global dust cycle during the Holocene, with dust loads ranging from 17.2 to 20.8 Tg between 2000 and 10 000 years ago and with a minimum in the early to mid-Holocene (6000–8000 years ago).…”
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    The gravity field, orientation, and ephemeris of Mercury from MESSENGER observations after three years in orbit by Mazarico, Erwan Matias, Genova, Antonio, Goossens, Sander, Lemoine, Frank G., Neumann, Gregory A., Solomon, Sean C., Zuber, Maria, Smith, David Edmund

    Published 2015
    “…We have analyzed 3 years of radio tracking data from the MESSENGER spacecraft in orbit around Mercury and determined the gravity field, planetary orientation, and ephemeris of the innermost planet. …”
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    Sulfur isotopes of organic matter preserved in 3.45-billion-year-old stromatolites reveal microbial metabolism by Bontognali, Tomaso R. R., Sessions, Alex L., Allwood, Abigail C., Fischer, Woodward W., Grotzinger, John P., Eiler, John M., Summons, Roger E

    Published 2013
    “…The 3.45-billion-year-old Strelley Pool Formation of Western Australia preserves stromatolites that are considered among the oldest evidence for life on Earth. …”
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  19. 19

    Distribution of present-day vertical deformation across the Southern Alps, New Zealand, from 10 years of GPS data by Beavan, J., Denys, P., Denham, M., Molnar, P., Hager, Bradford H, Herring, Thomas A

    Published 2017
    “…We use ten years of GPS data from nine continuous and six semi-continuous GPS stations in a transect across the Southern Alps to measure rates of relative vertical movement with typical 1σ uncertainties of 0.3–0.5 mm/yr. …”
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