Development of a drop Freezing Ice Nucleation Chamber (FINC) · 2020-05-04 · Borduas-Dedekind,...
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Anna J. Miller 1 , Killian P. Brennan 2 , Jörg Wieder 2 , Claudia Mignani 3 , Assaf Zipori 4 , Nadine Borduas- Dedekind 1,2 1 Institute for Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland 2 Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland 3 Institute of Environmental Geosciences, University of Basel, Basel, Switzerland 4 Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel 1 Development of a drop Freezing Ice Nucleation Chamber (FINC) EGU 2020 @annajjmiller [email protected]
Transcript of Development of a drop Freezing Ice Nucleation Chamber (FINC) · 2020-05-04 · Borduas-Dedekind,...
Anna J. Miller1, Killian P. Brennan2, Jörg Wieder2, Claudia Mignani3, Assaf Zipori4, Nadine Borduas-Dedekind1,2
1Institute for Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland 2Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland3Institute of Environmental Geosciences, University of Basel, Basel, Switzerland 4Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel
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Development of a drop Freezing Ice Nucleation Chamber (FINC)
EGU 2020
@annajjmiller
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The importance of immersion freezing in mixed phase clouds
Mixed-phase cloudImmersion freezing
50% of precipitation20% of global coverage
Storelvmo, Hoose, Eriksson, J. Geophys. Res., 2011
/ice nucleating particle (INP)aerosols
cloud condensation nuclei (CCN)
decreasing temperatures
??
[aerosols] [CCN] [INPs]
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Method: DRop Freezing Ice Nuclei Counter Zurich (DRINCZ)LE
D lights
PCR trayscamera
David et al., Atmos. Meas. Tech. 2019, 12, 6865 David, Cascajo, Brennan, Rösch, Els, Werz, Weichlinger, Boynton, Bogler, Borduas-Dedekind, Marcolli, Kanji, Atmos. Meas. Tech., 2019
Temperature
Froz
en F
ract
ion
0
1
Frozen
Liquid
-15-25
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Introducing the new drop Freezing Ice Nuclei Counter (FINC)!
Upgrade from DRINCZ:Ø Smaller volumes (5 µL) Ø Lower background (T50 –25 °C)Ø More wells (288)Ø Automated bath leveling
Miller, Brennan, Wieder, Mignani, Zipori, Borduas-Dedekind, 2020, to be submitted
Pump
Arduino
Lauda Chiller
Reservoir
wells
ethanol reservoir
camera
ethanol cooling bath
LED light + diffusor
pump
Arduino control panel
ethanol cooling bath
Arduino control panel
pump
ethanol reservoir
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FINC Validation: Intercomparison using NX-illite and lignin
Ø FINC measurements compare well with the other instruments for both NX-illite suspensions and lignin solution
LINDA
Miller, Brennan, Wieder, Mignani, Zipori, Borduas-Dedekind, 2020, to be submitted
Lignin (Sigma Aldrich)20 mgC/L solution
§ Well suited for quantifying immersion freezing of INPs active at moderate supercooling (between -10 and -25 °C)
§ For example:§ Organic macromolecules
§ see presentation of Nadine Borduas-Dedekind§ Lignin
§ see presentation of Sophie Bogler§ Ambient organic aerosol
§ see presentation of Silvan Müller§ Biomass burning aerosol§ Dissolved organic matter from lakes and rivers
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Applications of FINC
