Coordinate Sampling and Analytical Effort to Examine Interactions Between INPs and Rainout in Winter 2016 ARs in California Hari Mix 1 , Sean Reilly 1 , Jessie Creamean 2 , Charlotte Beall 3 , Gavin Cornwell 3 , Louise Kristensen 4 , Bas Schaap 2 , Dolan Lucero 4 and Andrew Martin 5 1 Santa Clara University, Dept. of Environmental Studies and Sciences 2 Cooperative Institute for Research in Environmental Sciences 3 UC San Diego, Center for Aerosol Impacts on Climate and the Environment 4 UC San Diego, Dept. of Chemistry and Biochemistry 5 Center for Western Weather and Water Extremes
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Coordinate Sampling and Analytical Effort to Examine Interactions Between INPs and Rainout in Winter 2016 ARs in CaliforniaHar i Mix 1, Sean Rei l ly 1, Jess ie Creamean 2, Char lotte Beal l 3, Gavin Cornwel l 3, Louise Kr istensen 4, Bas Schaap 2, Dolan Lucero 4 and Andrew Mart in 5
1S a n t a C l a ra U n i v e rs i t y, D e p t . o f E n v i r o n m e n ta l S t u d i e s a n d S c i e n c e s2C o o p e r a t i v e I n s t i t u t e fo r R e s e a rc h i n E n v i ro n m e n ta l S c i e n c e s3U C S a n D i e g o , C e n t e r fo r A e r o s o l I m p a c t s o n C l i m a t e a n d t h e E n v i r o n m e n t4U C S a n D i e g o , D e p t . o f C h e m i s t r y a n d B i o c h e m i s t r y5C e n t e r fo r We s t e r n We a t h e r a n d Wa t e r E x t r e m e s
Outline
I. Guiding research questions
II. Sampling network
III. Preliminary results
I. Guiding research questions
1. What are the stable isotope signatures of extreme precipitation events and which macro- and micro-scale dynamics are responsible for producing them?
2. What are the moisture and aerosol sources during extreme precipitation events and how do these change within storms?
3. What are the relationships between aerosols and precipitation amount, efficiency and phase?
II. Sampling network• Hourly integrated precipitation samples
collected at five sites throughout California during December, 2015 – March, 2016 • All rain events sampled at Santa Clara
(SCU) and Santa Cruz (LML)• Three ARs sampled at Bodega Bay (BBY)
and Cazadero (CZC)• March ARs sampled at Shasta Lake (SLA)
• Continuous ground-level vapor isotopic composition measured in real time at Bodega Bay for part of February and March LML
SCU
BBYCZC
SLA
III. Preliminary resultsMarch 5-7, 2016 AR
A case study of Bodega Bay and Cazadero
III. Preliminary results
Peak AR
Co
ld Fro
nt
Deuterium excess (DE)
δD = 8 × δ18O + DE
DE increases with increasing moisture deficit (1-RH)
Sharp (2007)
Decreasin
g RH
March 5
March 6
Relative H
um
idity
Aerosols and rainout in Switzerland
Stopelli et al. (2015)
Paired aerosol sampling
0
15
30
45
60
75
-20 -15 -10 -5
INP/mL
-20 -15 -10 -5-20 -15 -10 -5˚C
(A) (B) (C)
(C)(B)(A)
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