Fill dynamics and sample mixing in the AirCore

Abstract. The AirCore is a long coiled tube that acts as “tape recorder” of the composition air it slowly filled or flushed. When launched by balloon with one end open and other closed, initial fill flows out during ascent outside pressure drops. During descent atmospheric back in. I describe how we can associate position an parcel in altitude came from modeling dynamics process. conditions need to be satisfied for model accurate are derived. extent mixing parcels enter at different times calculated so know many independent samples upon landing later when analyzed.