Search Results

You are looking at 1 - 5 of 5 items for :

  • Radiative fluxes x
  • The Olympic Mountains Experiment (OLYMPEX) x
  • All content x
Clear All
Andrew Heymsfield, Aaron Bansemer, Norman B. Wood, Guosheng Liu, Simone Tanelli, Ousmane O. Sy, Michael Poellot, and Chuntao Liu

sample volumes of the particle probes compared to those of the radars. The use of the HVPS-3 probe greatly increases the sample volume compared to measurements obtained from other aircraft-radar “collocation” studies. The HVPS-3 has a sample volume that is 73% larger than that of the 2D-P probe that has been used in earlier studies. Further discussion of this point is given in section 3 and in the conclusions. b. Mass-flux conservation through the melting layer The second method used to derive

Full access
Robert Conrick and Clifford F. Mass

disdrometers was documented by Jaffrain and Berne (2011) , who demonstrated that number concentration uncertainty was less than 5% and D 0 uncertainty less than 7% at temporal averages exceeding 10 min. Thus, there is confidence that the observing systems used in this study are sufficiently accurate for model evaluation. 3. Results of OLYMPEX wintertime simulations a. Fidelity of incoming moisture flux during the OLYMPEX project Before evaluating model microphysics, it is important to evaluate the

Full access
Aaron R. Naeger, Brian A. Colle, Na Zhou, and Andrew Molthan

partly attributed to initial conditions, in addition to choice of BMP and model resolution. Martin et al. (2018) attributed precipitation deficiencies for AR simulations from the WRF Model to low biases in the low-level water vapor flux. Thus, there remains a strong need to improve forecasts of extreme precipitation events such as ARs in an effort to mitigate flood risk and damage from these storms. The suite of intensive instrumentation deployed during the recent Olympic Mountains Experiment

Free access
William Ryan Currier, Theodore Thorson, and Jessica D. Lundquist

encompasses Washington State and uses the Thompson et al. (2004 , 2008) microphysical scheme without convective parameterizations for numerical weather prediction. Shortwave and longwave radiation simulations used the Rapid Radiative Transfer Model ( Mlawer et al. 1997 ). WRF was run with 84-h forecasts that were initialized every 12 h. As in Minder et al. (2010) and Wayand et al. (2016a) , the 12–24 h forecasts were extracted from the 84-h forecasts and concatenated to provide a temporally

Full access
Annareli Morales, Hugh Morrison, and Derek J. Posselt

condition. A positive definite advection scheme is used, and a Rayleigh damper with damping coefficient of 0.0003 s −2 is applied to the top 4 km to prevent reflection of vertically propagating gravity waves. Although interactions of radiation with the mountain surface can result in the forcing of mesoscale mountain circulations, for example, mountain-valley winds, our focus is on the interaction of microphysics and dynamics. Thus, radiative transfer and surface heat flux parameterizations are

Full access