1 / 5

Supercooled altocumulus clouds

Supercooled altocumulus clouds. Met Office models have most sophisticated cloud scheme Separate prognostic liquid and ice … but have the worst supercooled liquid water content and liquid cloud fraction What are we doing wrong in these schemes ? Poor vertical resolution (~500 m)

lore
Télécharger la présentation

Supercooled altocumulus clouds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Supercooled altocumulus clouds • Met Office models have most sophisticated cloud scheme • Separate prognostic liquid and ice • … but have the worst supercooled liquid water content and liquid cloud fraction • What are we doing wrong in these schemes? • Poor vertical resolution (~500 m) • Ice microphysics (e.g. Ice PSD)

  2. Resolution dependence: idealised simulation Ice Liquid 50 m 500 m

  3. Parameterization at work Ice Liquid 50 m 500 m

  4. Global cloud fraction verification INSECTS AEROSOL RAIN SUPERCOOL WARM LIQUID ICE + S’COOL ICE CLEAR

  5. Stationary orographic convective rainbands (HIGH terrain) – CTL CTL – (Albedo=1) Mean Wind

More Related