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Showing 1–9 of 9 results
Advanced filters: Author: C Kamae Clear advanced filters

  • Due to their intense moisture transport, atmospheric rivers are associated with hydrological hazards such as extreme rainfall and flooding. This Review discusses how atmospheric-river characteristics and impacts may change with warming, synthesizing physical theory, observations and modelling.

    • Ashley E. Payne
    • Marie-Estelle Demory
    • F. Martin Ralph
    Reviews
    Nature Reviews Earth & Environment
    Volume: 1, P: 143-157

  • The connections between global mean temperature and precipitation responses to CO2 doubling (equilibrium climate and hydrological sensitivity) are driven through low-cloud responses to surface warming, according to MIROC5 perturbation experiments.

    • Masahiro Watanabe
    • Youichi Kamae
    • Kentaroh Suzuki
    Research
    Nature Climate Change
    Volume: 8, P: 901-906

  • Lorentz invariance — the postulate that all observers measure exactly the same speed of light in vacuum, independent of photon energy — is a cornerstone of Einstein's special relativity, but it has been suggested that it might break near the Planck scale. A possible variation of photon speed with energy is a key test for this proposed violation; here, by studying sharp features in γ-ray burst light-curves to look for even tiny variations in photon speed, no evidence for the violation of Lorentz invariance is found.

    • A. A. Abdo
    • M. Ackermann
    • M. Ziegler
    Research
    Nature
    Volume: 462, P: 331-334

  • It is widely accepted that strong and variable radiation detected over all accessible energy bands in a number of active galaxies arises from a relativistic, Doppler-boosted jet pointing close to our line of sight. However, the size of the emitting zone and the location of this region relative to the central supermassive black hole are poorly understood. Here, the coincidence of a γ-ray flare with a dramatic change of optical polarization angle is reported, providing evidence for co-spatiality of optical and γ-ray emission regions and indicating a highly ordered jet magnetic field.

    • A. A. Abdo
    • M. Ackermann
    • M. Sikora
    Research
    Nature
    Volume: 463, P: 919-923

  • High-resolution X-ray spectra show near-solar abundances of chromium, manganese and nickel with respect to iron in the Perseus cluster, suggesting that the progenitors of type Ia supernovae could be near- and sub-Chandrasekhar-mass white dwarfs.

    • Felix Aharonian
    • Hiroki Akamatsu
    • Abderahmen Zoghbi
    Research
    Nature
    Volume: 551, P: 478-480

  • X-ray observations of the core of the Perseus cluster reveal a remarkably quiescent atmosphere in which the gas has a line-of-sight velocity dispersion of about 164 kilometres per second in the region 30–60 kiloparsecs from the central nucleus; turbulent pressure support in the gas is four per cent of the thermodynamic pressure, necessitating only a small correction to the total cluster mass determined from hydrostatic equilibrium.

    • Felix Aharonian
    • Hiroki Akamatsu
    • Abderahmen Zoghbi
    Research
    Nature
    Volume: 535, P: 117-121