The LPVEx Experiment Overview and Layout
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Transcript The LPVEx Experiment Overview and Layout
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Science Goals
1. Characterize the relative abilities of space-based W, Ku-,
and Ka-band radars and microwave imagers and sounders
to detect light.
What are the detection limits of each instrument?
Can rainfall probabilities be assigned to Z and TB signatures?
2. Evaluate retrievals of rainfall intensity in shallow freezing
level environments.
How does the ratio of cloud-rain impact PIA and PMW TBs?
How does the vertical structure of precipitation impact
emission/attenuation-based algorithms?
What are the impacts of other algorithm assumptions including DSD
and melting layer properties on rainrate estimates?
How do well are FOV-dependent factors such as beamfilling and
multiple-scattering represented?
3. Determine the properties of the local environment that
influence the characteristics of precipitation in this region.
7-Apr-15
LPVEx 2010
2
Ground Instrumentation
Ground Sensors
Disdrometers: 2DVD (2) and Parsivel (6-10)
10+ rain gauges
5 SWE probes
ADMIRARI Radiometer (total LWP)
3 C-band Doppler radars (fully adaptable scanning geometry)
Still looking for Ka- and or X-band radar
2 Precipitation Occurrence Sensing Systems (POSS)
UHF Wind Profiler
3 Micro Rain Radars (MRR)
SMEAR aerosol/flux tower
6 Ceilometers
Sounding system and expendables at Jarvenpaa (+ twice daily
soundings from St. Petersburg, Tallinn, and Jokioinen)
7-Apr-15
LPVEx 2010
3
Aircraft & Research Vessel
Z
DSD/PSD
Wyoming King Air
RH and LWP
W-band cloud radar
T and z
Water content: DMT, Gerber, Nevzorov
Microphysics: 2D-P, CIP, CDP (FSSP/2D-C)
Aerosol: PCASP-100X, UWYO CCNC-100A
Ancillary: RH, T, altitude, wind speed
RV Aranda
Weather mast with disdrometers installed
Vaisala sounding system
Oceanographic measurements (conductivity, temperature, depth,
Accoustic Doppler Current Profiler (ADCP), etc.)
7-Apr-15
LPVEx 2010
4
Layout
Green = FMI Wx Stn
= Enhanced Obs.
= Spiral
= Stacked
flight tracks
= Vaisala WxTs (inc. rain)
Gray circles = 20 km radar range rings
Järvenpää
Turku
Kerava
Emasalo
Kumpula
Harmaja
Spiral S1
Kalbadaglund
Physical Validation Strategy
Direct Evaluation
Coordinated airborne W-band radar with in situ ground-based,
and ship-based μ-physics, precip., and thermodynamics.
Measurement
Observable Simulators
In situ observations constrain DSD retrievals within C-band
radar volumes. These 3D fields provide input to PMW and
Ka/Ku-band simulators.
Cloud Resolving Models & Satellite Simulators
Cloud resolving model simulations with both GCE and RAMS
provide another source of input to simulators.