Water Vapor during ICARTT 2004: Comparison of AATS-14, J31 in situ, Ron Brown sonde measurements

1. Water Vapor during ICARTT 2004: Comparison of AATS-14, J31 in situ, Ron Brown sonde measurements NASA Ames Airborne Sunphotometer Team SSFR Team Presented by John Livingston SRI International J31 Data Workshop 9-10Mar05

2. JETSTREAM-31 during ICARTT 2004 Vaisala HMP243 AATS-14 SSFR

3. Calculation of relative humidity by the Vaisala HMP243 • HMP243 consists of a heated composite humidity sensor head and an optional sensor head to measure ambient temperature • Both probes mounted on the J31 during the ICARTT study • Primary output is dewpoint, which is calculated within HMP243 from humidity and temperature readings of composite sensor • Separate temp probe permits calculation of ambient relative humidity • HMP243 outputs of ambient temperature, Ttotal, and relative humidity, RHVaisala, were recorded by SSFR data system • Because the separate temperature probe is subject to dynamic heating effects, both Ttotal and RHVaisala must be corrected to account for these effects

4. Calculation of water vapor density from J31 in-situ measurements • Measured quantities: Pwing, Pnose, TVaisala probe2, RHVaisala

5. Calibration of J31 Pressure Sensors Pstatic(nose) Ptotal(wing) Slide provided by Peter Pilewskie

6. Calculation of water vapor density from J31 in-situ measurements • Measured quantities: Pwing, Pnose, TVaisala probe2, RHVaisala

8. Table of AATS-14 H2O profiles and Ron Brown radiosonde measurements

9. 16 Jul F9

11. uncorrected

15. 15 Jul F8

19. 22 Jul F13 • DC-8 coordination

21. 29 Jul F16

25. 31 Jul F18

30. 2 Aug F20 • DC-8 coordination

32. 3 Aug F21 • DC-8 coordination

34. 7 Aug F22 • DC-8 coordination, MISR

35. missing sonde?

36. 7 Aug F23