Abstract
Biological particles may play an important role in the climate system by efficiently acting as ice nucleating particles (INPs) at a higher temperature range (e.g., above -20 °C where representative INPs such as mineral dust remain inactive), but there is an obvious lack of direct evidence that these particles serve in this manner. Here, we collected ambient particles under different weather conditions for identifying INPs that are active above -22 °C. The abundance of such efficient INPs increased during or following rainfall events. The extensive characterization of individual particles by three different analyses (particle morphology and composition, heat sensitivity of ice nucleation activities, and biological fingerprinting by DNA staining) revealed that efficient INPs have distinctly biological characteristics, which differ significantly from more abundant, representative, and relatively less active INPs, such as mineral dust. Additionally, by combining the heat-sensitivity experiments and DNA staining techniques, efficient INPs were found to contain heat-sensitive biomaterials and biological cells. Our findings provide direct evidence that biological particles are preferentially released into the atmosphere during rainfall events and act as important atmospheric INPs at higher temperature ranges (warmer than -22 °C), where typical INPs remain inactive.
| Original language | English |
|---|---|
| Article number | 605 |
| Journal | Atmosphere |
| Volume | 10 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2019 Oct 1 |
Fingerprint
Keywords
- Biological particle
- Climate dynamics
- Ice nucleating particle
- Ice nucleation
- Water cycle
ASJC Scopus subject areas
- Environmental Science (miscellaneous)
Cite this
Release of highly active ice nucleating biological particles associated with rain. / Iwata, Ayumi; Imura, Mayu; Hama, Moeka; Maki, Teruya; Tsuchiya, Nozomu; Kunihisa, Ryota; Matsuki, Atsushi.
In: Atmosphere, Vol. 10, No. 10, 605, 01.10.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Release of highly active ice nucleating biological particles associated with rain
AU - Iwata, Ayumi
AU - Imura, Mayu
AU - Hama, Moeka
AU - Maki, Teruya
AU - Tsuchiya, Nozomu
AU - Kunihisa, Ryota
AU - Matsuki, Atsushi
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Biological particles may play an important role in the climate system by efficiently acting as ice nucleating particles (INPs) at a higher temperature range (e.g., above -20 °C where representative INPs such as mineral dust remain inactive), but there is an obvious lack of direct evidence that these particles serve in this manner. Here, we collected ambient particles under different weather conditions for identifying INPs that are active above -22 °C. The abundance of such efficient INPs increased during or following rainfall events. The extensive characterization of individual particles by three different analyses (particle morphology and composition, heat sensitivity of ice nucleation activities, and biological fingerprinting by DNA staining) revealed that efficient INPs have distinctly biological characteristics, which differ significantly from more abundant, representative, and relatively less active INPs, such as mineral dust. Additionally, by combining the heat-sensitivity experiments and DNA staining techniques, efficient INPs were found to contain heat-sensitive biomaterials and biological cells. Our findings provide direct evidence that biological particles are preferentially released into the atmosphere during rainfall events and act as important atmospheric INPs at higher temperature ranges (warmer than -22 °C), where typical INPs remain inactive.
AB - Biological particles may play an important role in the climate system by efficiently acting as ice nucleating particles (INPs) at a higher temperature range (e.g., above -20 °C where representative INPs such as mineral dust remain inactive), but there is an obvious lack of direct evidence that these particles serve in this manner. Here, we collected ambient particles under different weather conditions for identifying INPs that are active above -22 °C. The abundance of such efficient INPs increased during or following rainfall events. The extensive characterization of individual particles by three different analyses (particle morphology and composition, heat sensitivity of ice nucleation activities, and biological fingerprinting by DNA staining) revealed that efficient INPs have distinctly biological characteristics, which differ significantly from more abundant, representative, and relatively less active INPs, such as mineral dust. Additionally, by combining the heat-sensitivity experiments and DNA staining techniques, efficient INPs were found to contain heat-sensitive biomaterials and biological cells. Our findings provide direct evidence that biological particles are preferentially released into the atmosphere during rainfall events and act as important atmospheric INPs at higher temperature ranges (warmer than -22 °C), where typical INPs remain inactive.
KW - Biological particle
KW - Climate dynamics
KW - Ice nucleating particle
KW - Ice nucleation
KW - Water cycle
UR - http://www.scopus.com/inward/record.url?scp=85074098481&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85074098481&partnerID=8YFLogxK
U2 - 10.3390/atmos10100605
DO - 10.3390/atmos10100605
M3 - Article
AN - SCOPUS:85074098481
VL - 10
JO - ATMOSPHERE
JF - ATMOSPHERE
SN - 2073-4433
IS - 10
M1 - 605
ER -