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1 results

  • Variational assimilation of web camera-derived estimates of visibility for Alaska aviation

  • Jacob R. Carley, Michael Matthews, Matthew T. Morris, Manuel S. F. V. De Pondeca, Jenny Colavito, Runhua Yang
  • Journal:
    Experimental Results / Volume 2 / 2021
    Published online by Cambridge University Press:
    15 March 2021, e14
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  • The Real Time Mesoscale Analysis (RTMA), a two-dimensional variational analysis algorithm, is used to provide hourly analyses of surface sensible weather elements for situational awareness at spatial resolutions of 3 km over Alaska. In this work we focus on the analysis of horizontal visibility in Alaska, which is a region prone to weather related aviation accidents that are in part due to a relatively sparse observation network. In this study we evaluate the impact of assimilating estimates of horizontal visibility derived from a novel network of web cameras in Alaska with the RTMA. Results suggest that the web camera-derived estimates of visibility can capture low visibility conditions and have the potential to improve the RTMA visibility analysis under conditions of low instrument flight rules and instrument flight rules.