ATTREX cloud measurements & implications for dehydration in the Tropical Tropopause Layer
Instrumented Balloon Launches for ATTREX
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Transcript of Instrumented Balloon Launches for ATTREX
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Instrumented Balloon Launches for ATTREXDale Hurst, Emrys Hall, Allen Jordan
Global Monitoring Division, NOAA Earth System Research Laboratoryand CIRES, University of Colorado, Boulder
Boulder Balloon Soundings … still going strong after 33 years!
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Ozonesonde
Radiosonde
NOAA FPH
AirIntake Tubes
Payload Weight: 2.0 kg (4.4 lb)Payload Size: 15” x 12” x 8”
Instrument Payload
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Payload Measurements
Primary DataUncertainty
Instrument Measurement Product(Stratosphere)
NOAA FPH TFP H2O VMR<±10% (±0.5 ppmv)(custom)
P
POzonesonde PO3O3 VMR
<±5% (±0.3 ppmv )(DMT)Radiosonde T
<±0.5° C(Intermet) P
<±0.5 hPa 403 MHz RH NA > 12 km
GPS payload location, horizontal winds
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Balloon Flight Profile
Ascent Rate+5 m/s
(1000 ft/s)
Valve opens
Descent Rate-5 m/s
~ 70 minutes
~ 90 minutes
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Ideally …
Coordination with GH flights
• 1 balloon launch per GH flight• 4-6 flights anticipated (4 week window)• Close spatiotemporal coincidence with GH• Requires launch timing and trajectory to be
coordinated with GH flight plan
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Balloon Trajectory Prediction (2D)
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Balloon Trajectory Prediction (3D)
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Potential Launch Sites
AndersenAFB
NWSFacility
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Ballooning over the Rockies
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FPH Measurement Technique
Stable Frost Layer =equilibrium between frost layer and water vapor in air flow
PH2O = f(TFP) Clausius-Clapeyron equation (Psat over ice)
H2O VMR = PH2O / (Pair – PH2O)
CalibratedNIST scale
PID Temp Controller