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SPACCS 2008 summary meeting 1 S torm P eak A erosol and C loud C haracterization S tudy

SPACCS 2008 summary meeting 1 S torm P eak A erosol and C loud C haracterization S tudy. May 12, 2008. Goals of today’s meeting . Review of data collected Update of analysis/results Discussion of papers from field study Identification of overlap and collaborations Timelines.

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SPACCS 2008 summary meeting 1 S torm P eak A erosol and C loud C haracterization S tudy

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  1. SPACCS 2008 summary meeting 1Storm Peak Aerosol and Cloud Characterization Study May 12, 2008

  2. Goals of today’s meeting • Review of data collected • Update of analysis/results • Discussion of papers from field study • Identification of overlap and collaborations • Timelines http://acd.ucar.edu/~christin/SPstudy/MainStudy.htm

  3. Data Summary • All data collected during the study (see Tables) • instruments up to site: March 24, 2008 instruments down: April 14, 2008 (3 week period)

  4. Meteorology Summary • At SPL: • General observations: • Pressure steady • Temperatures variable- but never below 00F • Relative Humidity- only a few times less than 60% • Winds calmer during second part of study

  5. Clear conditions defined as RH < 70% 27% of time from March 23-April 15 As opposed to Lowenthal et al. (2002) 62% clear from April 18-May 17, 2001

  6. Winds typically from S, W, N (West) From 1500-3600 Average (03/23-04/15) wind direction 2440 (SW) Average wind direction at 12:00 local time: 2460 (SW) Meteorological Summary 0/3600 3150 450 2700 900 1800 2250 1350

  7. Need to confirm times!

  8. Mountain Meteorology Dry Bulb T Relative Hum. - No data for 0 or 4 6 3 7 2 5 1

  9. the aerosol absorption total aerosol scattering

  10. Things to update/go over • Mountain met: How do we confirm when we were in the free troposphere? • What other data needs to be posted? • SMPS/APS • Correct for multiple charge? (Lowenthal et al., 2002) • What times (am or pm) were the O3 files started at (confirm with Gannet)

  11. Future Directions • Comparison of Hi-Vol ECOC amounts to continuous measurements • Comparison of high EC peaks to lab events/CO/CO2/O3 data • Look at Asian dust trajectories correlated with ECOC values • Sources of aerosols measured

  12. ECOC + Hi Vol UpdateSPACC 2008 Eszter Horanyi 5-7-08

  13. PM2.5 Measurements Only 2 days of data 1 during low EC for PM10 and 1 during high EC event High EC event in both BL & FT, OC seems unaffected

  14. PM10 Measurements 4 distinct high EC event during study First and last only effects boundary layer Middle two involve free troposphere in addition to BL

  15. ECOC Analysis • PM 2.5 machine reading systematically high • Adjustments and calibrations currently under way • Final volumes and concentrations expected by end of May

  16. Hi-Vol Data Teflon filters weighed with many having enough mass to move forward Noise level is ~ 2 ug/m3

  17. Concentration of total, biological, and bacterial ice nuclei active at -7oC in snow from Montana, France, Antarctica, and the Yukon Christner et al. (2008) Science 319:1214

  18. Cluster analysis of biological ice nucleating data from Montana snowfall 2005-2006 Christner et al., in preparation

  19. Multiple regression model for predicting the cell and biological ice nuclei concentration in Montana snowfall 2005-2006 Christner et al., in preparation

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