WAIS Divide

Liquid-bearing cloud visible OD correspondence with LW opacity

Liquid and Ice Water Paths Comparisons – ERA-5

Observedliquid&nomodelliquid–61%Modelliquid&noobservedliquid–56%

Nocorrela4on

Observedice&nomodelice–24%Modelice&noobservedice–27%

Reasonablecorrela4on,mainlyathigherIWP

Silberetal.,J.Clim.,submi1ed

Liquid and Ice Water Paths Comparisons – AMPS

Observedliquid&nomodelliquid–99.5%Modelliquid&noobservedliquid–35%Notmanydatapointstocorrelate…

Observedice&nomodelice–15%Modelice&noobservedice–25%

Weakcorrela4onathigherIWPvalues

Silberetal.,J.Clim.,submi1ed

Resolved Cloud Mask • HourlycloudmasksaregeneratedusingtheobservaSonsfromtheAWAREcampaign.

• CloudoccurrenceSmeseriesisderivedfromtheresolvedcloudmasks.

Tenuousliquid-bearing Opaqueliquid-bearing Iceonly

August,2016

Wewillexaminethemodelperformanceinthreedifferentcloudregimes:1.   Tenuousliquid-bearing(mixed-phase)

clouds(LWP<25g/m2).2.   Opaqueliquid-bearing(mixed-phase)

clouds(LWP≥25g/m2).3.   Iceclouds.

Drizzlecase(High-La4tudesessiontomorrowanernoon)

Silberetal.,JGR,2018

WAIS Divide

Silberetal.,J.Clim.,inrevision

Sounding comparison

Modeled vs. Observed LW Radiation

Lack of the Opaque Regimes in the Models

LW↓

LW↑Summer

winter

Separa4on

Cloudy vs. Clear-sky LW radiation

LW↓

LW↑Summer

winter

Separa4on

Seasonal Behavior

Modeled LW↓ Bias

Note:onanannualperspec4ve,themodelsdoprovideareasonableperformance!

Modeled vs. Observed Downwelling LW

Modeled vs. Observed Downwelling SW