In AMIE ARM Science Team Meeting Washington DC 14 March 2012 R Houze University of Washington Summary Non precipitation features seen by SPolKa in AMIE Humidity Cumulus organization Cirrostratus amp altocumulus layers ID: 368907
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Slide1
Nonprecipitating Phenomena Seen by the S-PolKa Radar
In AMIE
ARM Science Team Meeting, Washington DC, 14 March 2012
R. Houze
University of WashingtonSlide2
Summary
Non-
precipitation features seen by S-PolKa in AMIEHumidity Cumulus organizationCirrostratus & altocumulus layersAnvils of deep convection Slide3
Humidity gradient layers and nonprecipitating cloudsSlide4
Bragg scattering shows nonprecipitating cumulus in the moist layer
dBZρhvZDR
“Mantle Echoes” Knight and Miller (1998)Slide5
Long lines of cumulusSlide6
Lines of cumulus parallel to windSlide7
Slightly active moist layer
Clouds
building at cold pool boundariesSlide8
graupel
small ice
large non-melting ice
h
eavy
rain
m
elting
ice
Hydrometeor identificationSlide9
An anvil example
Doppler velocityHydrometeor typeSlide10
A stratiform region anvil seen by
bothS-PolKa and KAZRSlide11
Dual-wavelength humidity profilesSlide12
End
This research was sponsored by DOE ARM grant #DE
-SC0001164/ER-64752Slide13
ExtrasSlide14
S
KaNCAR S-PolKa
RadarSlide15
Examples of Humidity Features and Nonprecipitating Clouds Seen by S-PolKaSlide16
Humidity gradient rings and nonprecipitating cloudsSlide17
Nonprecipitating clouds and virgaSlide18
Cold pool examples seen in differential reflectivity (ZDR)Slide19
Humidity rings and anvil cloudSlide20
The “worm echo”Slide21
Upper-level cloud over KAZRSlide22
Slightly active moist layer
Clouds building at cold pool boundariesSlide23
More ExtrasSlide24
Gan KAZR and SMART-RKAZR
SMART-R24Generally agree well above 3-km heightSMART-R low level (1-3km) APBelow 1-km SMART-R ground clutter? Slide25
Gan KAZR and SMART-RKAZR
SMART-R25Note: color scale is different between two radarsZtop difference is about 1~2 kmSMART-R Ze is about 8 dB too high (Courtney), this has not been corrected yetSlide26
Rain over area scanned by S-PolKa