1. PIKNMIX-C Cold-air outbreak sorties
Steven Abel and Richard Cotton
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2. Convective sorties B667:Convective clouds
GOAL: To provide comprehensive in-situ measurements of convective clouds in cold-air outbreak conditions for the evaluation of high resolution NWP model simulations
CONSTRAIN / PIKNMIX 2012: Significant underestimate of IWC in the model. Good cloud microphysics data but no in-cloud dynamics (icing of turbulenece probe).
PIKNMIX-C: AIMSS gives us the ability to look at in-cloud turbulence in the presence of supercooled water.
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3. Stratiform sorties B668: Stratiform clouds
GOAL: To provide measurements of the cloud topped boundary layer in the stratiform region and the transition to open cellular convection
PIKNMIX 2012: Good in-situ measurements of cloud and boundary layer structure. Model unable to capture overcast cloud in stratiform region. Well known model problem in cold-air outbreak conditions.
PIKNMIX-C: Provide additional case-studies for model evaluation
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4. PIKNMIX-2012 Satellite Control model Modified model
Model unable to capture stratocumulus cloud, even when modified set-up as in CONSTRAIN case-study. Requirement to make extensive measurements of boundary layer structure and cloud in this regime for other case-studies.
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5. The transition region and stratiform regime
Option A: Science on way to Iceland, refuel, return at high level dropping sondes (B668)
Option B: Overnight in Iceland. Full science flight, refuel, return at high level dropping sondes B A
Prestwick
FL200 A B
2 km
Iceland
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6. Instrumentation Key Instruments
Temperature, Total Water, AIMSS, Turbulence probe, PCASP, CDP, CIP-15, CIP-100, WVSS-II, General Eastern/Buck, Nevzorov, Dropsonde
Extremely useful
2D-C, 2D-S, CPI, FAAM CCN, FAAM CPC, Weather radar (for convective flights), Heimann, JW
Nice to have
ARIES, LIDAR, Core Chem, Nephelometer, PSAP, MARSS (for stratiform flight only), CVI, Aircraft video
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