TWP-ICE/ACTIVE MONSOON CASE STUDY

Ice water content retrievals (white symbols, mean and maximum) versus sample case study simulations (colored bars, mean to maximum):





Comments:

• Mean and maximum profiles are calculated for nine time ranges. The first three are longer time ranges: (1) all times following an initial 36 hours for model spin-up, (2) six days of monsoon, and (3) six days of suppressed conditions. The second six are 24-hour periods: three sequential monsoon events of increasing intensity, followed by cirrus evolution after the third event.
• Tropical Cloud Properties and Heating Rate Profiles (TCPRHP) retrievals at Darwin are supplied by Sally McFarlane, Jim Mather, and Jennifer Comstock. Values represent instantaneous profiles over the DOE ARM site reported at 10-s and 45-m resolution. Mean and maximum values are taken here at each level for each time period.
• All measurement data have been downloaded from the DOE ARM data archive (www.arm.gov) and use in publications is subject to the policies described there. Any errors in plotting or representation shown here should be blamed on Ann Fridlind.
• Model results are instantaneous values reported at 3-hr frequency and 1-km resolution (and averaged over lower resolutions) with a domain size of about 37,000 km². Mean and maximum values are shown at each level for each time period.

Preliminary summary:

• While there is almost always some overlap between the ranges of mean to maximum profile IWC, agreement is generally poor even when comparing non-precipitating columns. The modeled range exceeds the retrieved range, except at the top of the model column, when retrieved values significantly exceed modeled values, which is interesting. The instantaneous and high-resolution retrievals may indicate overshoots, pileus or non-convective cirrus that are not captured in the CRM simulations.