nonprecipitating phenomena seen by the s-polka radar in amie
DESCRIPTION
Nonprecipitating Phenomena Seen by the S-PolKa Radar In AMIE. R. Houze University of Washington. ARM Science Team Meeting, Washington DC, 14 March 2012. Summary. Non- precipitation features seen by S-PolKa in AMIE Humidity Cumulus organization Cirrostratus & altocumulus layers - PowerPoint PPT PresentationTRANSCRIPT
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Nonprecipitating Phenomena Seen by the S-PolKa RadarIn AMIE
ARM Science Team Meeting, Washington DC, 14 March 2012
R. HouzeUniversity of Washington
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SummaryNon-precipitation features seen by S-PolKa in AMIE• Humidity • Cumulus organization• Cirrostratus & altocumulus layers• Anvils of deep convection
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Humidity gradient layers and nonprecipitating clouds
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Bragg scattering shows
nonprecipitating cumulus in the
moist layer
dBZ
ρhv
ZDR
“Mantle Echoes” Knight and
Miller (1998)
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Long lines of cumulus
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Lines of cumulus parallel to wind
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Slightly active moist layer
Clouds building at cold
pool boundaries
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graupel
small ice large non-melting ice
heavyrain
meltingice
Hydrometeor identification
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An anvil example
Doppler velocity
Hydrometeor type
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A stratiform region anvil seen by
bothS-PolKa and KAZR
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Dual-wavelength humidity profiles
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EndThis research was sponsored by DOE ARM grant #DE-SC0001164/ER-64752
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Extras
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S
Ka
NCAR S-PolKaRadar
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Examples of Humidity Features and Nonprecipitating Clouds
Seen by S-PolKa
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Humidity gradient rings and nonprecipitating
clouds
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Nonprecipitating clouds and virga
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Cold pool examples seen in differential
reflectivity (ZDR)
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Humidity rings and anvil cloud
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The “worm echo”
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Upper-level cloud over KAZR
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Slightly active moist layer
Clouds building at cold pool boundaries
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More Extras
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Gan KAZR and SMART-R
KAZR SMART-R
• Generally agree well above 3-km height• SMART-R low level (1-3km) AP• Below 1-km SMART-R ground clutter?
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Gan KAZR and SMART-R
KAZR SMART-R
• Note: color scale is different between two radars
• Ztop difference is about 1~2 km• SMART-R Ze is about 8 dB too high
(Courtney), this has not been corrected yet
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Rain over area scanned by S-PolKa