Data · dataset · 2026
Ice and supercooled liquid water distributions over the southern ocean based on in situ observations and climate model simulations
Listed in National Center for Atmospheric Research
Three climate models are evaluated using in situ airborne observations from the Southern Ocean Clouds, Radiation, Aerosol Transport Experimental Study (SOCRATES) campaign.
Description
The evaluation targets cloud phases, microphysical properties, thermodynamic conditions, and aerosol indirect effects from -40 degrees C to 0 degrees C. Compared with 580-s averaged observations (i.e., 100 km horizontal scale), the Community Atmosphere Model version 6 (CAM6) shows the most similar result for cloud phase frequency distribution and allows more liquid-containing clouds below -10 degrees C compared with its predecessor-CAM5.
The Energy Exascale Earth System Model (E3SM) underestimates (overestimates) ice phase frequencies below (above) -20 degrees C. CAM6 and E3SM show liquid and ice water contents (i.e., LWC and IWC) similar to observations from -25 degrees C to 0 degrees C, but higher LWC and lower IWC than observations at lower temperatures. Simulated in-cloud RH shows higher minimum values than observations, possibly restricting ice growth during sedimentation.
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As number concentrations of aerosols larger than 500 nm (Na-500) increase, observations show increases of LWC, IWC, liquid, and ice number concentrations (N-liq, N-ice). Number concentrations of aerosols larger than 100 nm (Na-100) only show positive correlations with LWC and N-liq. From -20 degrees C to 0 degrees C, higher aerosol number concentrations are correlated with lower glaciation ratio and higher cloud fraction.
From -40 degrees C to -20 degrees C, large aerosols show positive correlations with glaciation ratio. CAM6 shows small increases of LWC and N-liq with Na-500 and Na-100. E3SM shows small increases of N-ice with Na-500.
Overall, CAM6 and E3SM underestimate aerosol indirect effects on ice crystals and supercooled liquid droplets over the Southern Ocean.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d7wm1hzj ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/ice-and-supercooled-liquid-water-distributions-over-th… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=fbd75fb9-3f31-4bcb-93a7-20451bf17… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
- Inferred from text
- Climate model simulation 65%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | fbd75fb9-3f31-4bcb-93a7-20451bf179a0 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[method].local:method:climate-model | enrichment · data ucar edu | keyword-concept-rules@1.0.0 | title+description (65%) |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |