Immersion freezing of clay minerals and bacterial ice nuclei
The immersion mode ice nucleation efficiency of clay minerals and biological aerosols has been investigated using the AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber. Both monodisperse and polydisperse populations of (1) various clay dust samples as well as (2) Snomax® (a pro...
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| Format: | Article |
| Language: | en_US |
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American Institute of Physics (AIP)
2014
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| Online Access: | http://hdl.handle.net/1721.1/87716 https://orcid.org/0000-0003-1851-8740 https://orcid.org/0000-0002-0828-8286 |
| _version_ | 1811090755042672640 |
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| author | Hiranuma, Naruki Möhler, Ottmar Bingemer, Heinz Bundke, Ulrich Cziczo, Daniel James Danielczok, Anja Ebert, Martin Garimella, Sarvesh Hoffmann, Nadine Hohler, Kristina Kanji, Zamin A. Kiselev, Alexei Raddatz, Michael Stetzer, Olaf |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Hiranuma, Naruki Möhler, Ottmar Bingemer, Heinz Bundke, Ulrich Cziczo, Daniel James Danielczok, Anja Ebert, Martin Garimella, Sarvesh Hoffmann, Nadine Hohler, Kristina Kanji, Zamin A. Kiselev, Alexei Raddatz, Michael Stetzer, Olaf |
| author_sort | Hiranuma, Naruki |
| collection | MIT |
| description | The immersion mode ice nucleation efficiency of clay minerals and biological aerosols has been investigated using the AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber. Both monodisperse and polydisperse populations of (1) various clay dust samples as well as (2) Snomax® (a proxy for bacterial ice nucleators) and (3) hematite are examined in the temperature range between −4°C and −35°C. The temperature dependence of ice formation inferred by the INAS (Ice Nucleation Active Surface-Site) density is investigated and discussed as a function of cooling rate and by comparing to predicted nucleation rates (i.e., classical nucleation theory with θ-probability density function nucleation scheme). To date, we observe that maintaining constant AIDA temperature does not trigger any new ice formation during the immersion freezing experiments with clay dust samples and Snomax®, implying strong temperature dependency (and weak time dependency) within our time scales and conditions of experiments. Ice residuals collected through a newly developed PCVI (Pumped ounter-flow Virtual Impactor) with the 50% cut size diameter of 10 to 20 μm have also been examined by electron microscope analyses to seek the chemical and physical identity of ice nuclei in clay minerals. In addition to the AIDA results, complementary measurements with mobile ice nucleation counters are also presented. |
| first_indexed | 2024-09-23T14:51:26Z |
| format | Article |
| id | mit-1721.1/87716 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:51:26Z |
| publishDate | 2014 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/877162022-10-01T22:57:26Z Immersion freezing of clay minerals and bacterial ice nuclei Hiranuma, Naruki Möhler, Ottmar Bingemer, Heinz Bundke, Ulrich Cziczo, Daniel James Danielczok, Anja Ebert, Martin Garimella, Sarvesh Hoffmann, Nadine Hohler, Kristina Kanji, Zamin A. Kiselev, Alexei Raddatz, Michael Stetzer, Olaf Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Cziczo, Daniel James Cziczo, Daniel James Garimella, Sarvesh The immersion mode ice nucleation efficiency of clay minerals and biological aerosols has been investigated using the AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber. Both monodisperse and polydisperse populations of (1) various clay dust samples as well as (2) Snomax® (a proxy for bacterial ice nucleators) and (3) hematite are examined in the temperature range between −4°C and −35°C. The temperature dependence of ice formation inferred by the INAS (Ice Nucleation Active Surface-Site) density is investigated and discussed as a function of cooling rate and by comparing to predicted nucleation rates (i.e., classical nucleation theory with θ-probability density function nucleation scheme). To date, we observe that maintaining constant AIDA temperature does not trigger any new ice formation during the immersion freezing experiments with clay dust samples and Snomax®, implying strong temperature dependency (and weak time dependency) within our time scales and conditions of experiments. Ice residuals collected through a newly developed PCVI (Pumped ounter-flow Virtual Impactor) with the 50% cut size diameter of 10 to 20 μm have also been examined by electron microscope analyses to seek the chemical and physical identity of ice nuclei in clay minerals. In addition to the AIDA results, complementary measurements with mobile ice nucleation counters are also presented. EUROCHAMP-2 (Transnational Access Activity E2-2012- 05-14-0075) Deutsche Forschungsgemeinschaft (DFG HALO priority program SPP 1294 (contract number MOEH 668/1-2)) Deutsche Forschungsgemeinschaft (DFG research unit 1525 INUIT) 2014-06-10T14:55:24Z 2014-06-10T14:55:24Z 2013 Article http://purl.org/eprint/type/ConferencePaper 978-0-7354-1152-4 0735411522 0094-243X http://hdl.handle.net/1721.1/87716 Hiranuma, Naruki, Ottmar Möhler, Heinz Bingemer, Ulrich Bundke, Daniel J. Cziczo, Anja Danielczok, Martin Ebert, et al. “Immersion Freezing of Clay Minerals and Bacterial Ice Nuclei” Nucleation and Atmospheric Aerosols: 19th international conference, Fort Collins, Colorado, USA, 23-28 June 2013. AIP Conf. Proc. 1527, 914 (2013). © 2013 AIP. https://orcid.org/0000-0003-1851-8740 https://orcid.org/0000-0002-0828-8286 en_US http://dx.doi.org/10.1063/1.4803420 AIP Conference Proceedings Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Institute of Physics (AIP) Prof. Cziczo via Chris Sherratt |
| spellingShingle | Hiranuma, Naruki Möhler, Ottmar Bingemer, Heinz Bundke, Ulrich Cziczo, Daniel James Danielczok, Anja Ebert, Martin Garimella, Sarvesh Hoffmann, Nadine Hohler, Kristina Kanji, Zamin A. Kiselev, Alexei Raddatz, Michael Stetzer, Olaf Immersion freezing of clay minerals and bacterial ice nuclei |
| title | Immersion freezing of clay minerals and bacterial ice nuclei |
| title_full | Immersion freezing of clay minerals and bacterial ice nuclei |
| title_fullStr | Immersion freezing of clay minerals and bacterial ice nuclei |
| title_full_unstemmed | Immersion freezing of clay minerals and bacterial ice nuclei |
| title_short | Immersion freezing of clay minerals and bacterial ice nuclei |
| title_sort | immersion freezing of clay minerals and bacterial ice nuclei |
| url | http://hdl.handle.net/1721.1/87716 https://orcid.org/0000-0003-1851-8740 https://orcid.org/0000-0002-0828-8286 |
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