Search Results

You are looking at 1 - 2 of 2 items for :

  • Risk assessment x
  • 16th International Symposium for the Advancement of Boundary-Layer Remote Sensing (ISARS 2012) x
  • All content x
Clear All
Mikael Sjöholm, Nikolas Angelou, Per Hansen, Kasper Hjorth Hansen, Torben Mikkelsen, Steinar Haga, Jon Arne Silgjerd, and Neil Starsmore

1. Introduction A major hazardous risk to helicopters is the unexpected encounter of degraded visual environments (DVEs) in close-to-ground operations, where a loss of visibility often is dangerously detrimental. The rotor downwash flow can cause such conditions as low visibility by stirring up sand and dust into an obscuring cloud surrounding the rotorcraft. This particular phenomenon is termed “brownout” and its counterparts occurring above water and above snow are termed “whiteout.” Despite

Full access
A. B. White, M. L. Anderson, M. D. Dettinger, F. M. Ralph, A. Hinojosa, D. R. Cayan, R. K. Hartman, D. W. Reynolds, L. E. Johnson, T. L. Schneider, R. Cifelli, Z. Toth, S. I. Gutman, C. W. King, F. Gehrke, P. E. Johnston, C. Walls, D. Mann, D. J. Gottas, and T. Coleman

), and when the state may face increasingly intense droughts. The tension between increasing floods and decreasing snowpacks is tightly bound because California’s reservoirs are used for both flood risk management and water supply purposes, with a volume of open space maintained for flood capture each winter that is nearly equal to the most optimistic projections of the volume of water that will no longer be stored in the state’s snowpacks by midcentury under global warming ( Knowles and Cayan 2004

Full access