1. CAS – total LWC comparison warm clouds

2. Assumptions Instruments time synchronization info isn't available for this period. Some of the instruments were not synchronized during this early stage of the campaign. I assume the positive mixing ratio coincide with onset of LWC measurements in CAS.

3. Limitations Horizontal sampling line – low penetration efficiency for big droplets and drops High concentrations and screening of big droplets by small droplets or particles cause lower LWC content. Presented CAS LWC data for droplets >3 

4. Equations (+10C)  ≡Density of dry air Liquid Water Mixing Ratio +10C: Liquid water mixing ratio measured by CAS: Assumption: changing chamber pressure at saturation, flux from the walls:

5. Runs details DateTime ExpansionCCNTemp [°C]O3SO2IsopreneUVfanalpha-pinCCN [cm^-3]RuntypeAMS MS 17/11/201315:10:001H2SO41082 ppb18 ppb17.5 pptoffon16301243.04GCRH2SO4 17:09:002H2SO410125 ppb18 ppb18 pptoff 5301243.06GCR H2SO4 18:46:003H2SO410120 ppb20 ppb17 pptoff 1701243.08GCR H2SO4 18/11/2013 02:35:401(NH4)2SO4?10135 ppb20 ppb17 pptoff 45101245.01GCR H2SO4 04:32:162(NH4)2SO4?10125 ppb20 ppb??off 16601245.03GCR H2SO4 19:32:571H2SO4/?10180 ppb0.8 ppb51 ppboff?9701247.01N H2SO4 23:02:042H2SO4/?10118 ppb0.9 ppb53 ppboff?79801247.05GCR (NH4)2SO4 19/11/201300:56:093H2SO4/?10140 ppb0.7 ppb34 ppboff?29901247.07CIGAR (NH4)2SO4 16:09:371(NH4)2SO410130 ppb24 ppb19 pptoff 30601248.13N (NH4)2SO4 20/11/201302:36:282(NH4)2SO410136 ppb2 ppb13 pptoff?21901249.03GCR (NH4)2SO4 08:42:563(NH4)2SO410136 ppb2.2 ppb12.5 pptoff?33801249.09GCR = CF 0.1kV (NH4)2SO4

6. 1243.04 P[mb],RH[%],T[K] seconds Conditions

7. 1243.04 [Kg/Kg]

8. 1243.06

10. 1243.08

12. 1245.01

14. 1245.03

16. 1247.01

18. 1247.05

20. 1247.07

22. 1248.13

24. 1249.03

26. 1249.09

28. conclusions Possible reasons for discrepancies in LWC measurements: -CAS limitation that were mentioned -wrong measurement of Pressure change -wrong measurement of MBW_dew -wall losses Should be compared to WELAS LWC