On the usage of classical nucleation theory in quantification of the impact of bacterial INP on weather and climate

Sahyoun, Maher; Wex, Heike; Gosewinkel, Ulrich; Šantl-Temkiv, Tina; Nielsen, Niels; Finster, Kai; Sørensen, Jens Havskov; Stratmann, Frank; Korsholm, Ulrik Smith

doi:10.1016/j.atmosenv.2016.05.034

Cited by 18 publications

(12 citation statements)

References 45 publications

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“…It is also becoming clear that bio-INPs typically predominate over minerals, in terms of their numeric abundance, across a wider temperature range than previously assumed, often comprising the majority of INPs at higher temperatures and down to -23 C (Hartmann et al 2019;Suski et al 2018;McCluskey et al 2018;Petters and Wright 2015;Mason et al 2015) or even colder (Tobo et al 2014). There is a vital need for numerical modeling studies to investigate the impact of different types of bioaerosols on cloud and precipitation properties as well as climate (e.g., Hummel et al 2018;Hoose, Kristj ansson, and Burrows 2010;Sahyoun et al 2016), from regional to global scales, and by considering biogenic INPs beyond whole microbial cells.…”

Section: Atmospheric Physics Clouds Climate and Hydrological Cyclementioning

confidence: 99%

Bioaerosol field measurements: Challenges and perspectives in outdoor studies

Šantl-Temkiv

Šikoparija

Maki

et al. 2019

Aerosol Science and Technology

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111

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Outdoor field measurements of bioaerosols are performed within a wide range of basic and applied scientific disciplines, each with its own goals, assumptions, and terminology. This article contains brief reviews of outdoor field bioaerosol research from these diverse interests, with emphasis on perspectives from the atmospheric sciences. The focus is on a high-level discussion of pressing scientific questions, grand challenges, and needs for cross-disciplinary collaboration. The research topics, in which bioaerosol field measurement is important, include (i) atmospheric physics, clouds, climate, and hydrological cycle; (ii) atmospheric chemistry; (iii) airborne allergencontaining particles; (iv) airborne human pathogens and national security; (v) airborne livestock and crop pathogens; and (vi) biogeography and biodiversity. We concisely review bioaerosol impacts and discuss properties that distinguish bioaerosols from abiological aerosols. We give extra focus to regions of specific interest, i.e., forests, polar regions, marine and coastal environments, deserts, urban and rural areas, and summarize key considerations related to bioaerosol measurements, such as of fluxes, of long-range transport, and of sampling from both stationary and vessel-driven platforms. Keeping in mind a series of key scientific questions posed within the diverse communities, we suggest that pressing scientific questions include the following: (i) emission sources and flux estimates; (ii) spatial distribution; (iii) changes in distribution; (iv) atmospheric aging; (v) metabolic activity; (vi) urbanization of allergies; (vii) transport of human pathogens; and (viii) climate-relevant properties.

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Section: Atmospheric Physics Clouds Climate and Hydrological Cyclementioning

confidence: 99%

Bioaerosol field measurements: Challenges and perspectives in outdoor studies

Šantl-Temkiv

Šikoparija

Maki

et al. 2019

Aerosol Science and Technology

Self Cite

111

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“…Small changes in the present meteorological base state may influence the effects of PB-INPs on cloud properties. Therefore, an ensemble of five independent model runs has been created by shifting large-scale atmospheric fields in each horizontal direction (Schlüter and Schädler, 2010;Sasse and Schädler, 2014). In the present model setup, the domain is shifted by two grid boxes (28 km) in each direction.…”

Section: Model Setupmentioning

confidence: 99%

Simulating the influence of primary biological aerosol particles on clouds by heterogeneous ice nucleation

et al. 2018

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Abstract. Primary ice formation, which is an important process for mixed-phase clouds with an impact on their lifetime, radiative balance, and hence the climate, strongly depends on the availability of ice-nucleating particles (INPs). Supercooled droplets within these clouds remain liquid until an INP immersed in or colliding with the droplet reaches its activation temperature. Only a few aerosol particles are acting as INPs and the freezing efficiency varies among them. Thus, the fraction of supercooled water in the cloud depends on the specific properties and concentrations of the INPs. Primary biological aerosol particles (PBAPs) have been identified as very efficient INPs at high subzero temperatures, but their very low atmospheric concentrations make it difficult to quantify their impact on clouds. Here we use the regional atmospheric model COSMO–ART to simulate the heterogeneous ice nucleation by PBAPs during a 1-week case study on a domain covering Europe. We focus on three highly ice-nucleation-active PBAP species, Pseudomonas syringae bacteria cells and spores from the fungi Cladosporium sp. and Mortierella alpina. PBAP emissions are parameterized in order to represent the entirety of bacteria and fungal spores in the atmosphere. Thus, only parts of the simulated PBAPs are assumed to act as INPs. The ice nucleation parameterizations are specific for the three selected species and are based on a deterministic approach. The PBAP concentrations simulated in this study are within the range of previously reported results from other modeling studies and atmospheric measurements. Two regimes of PBAP INP concentrations are identified: a temperature-limited and a PBAP-limited regime, which occur at temperatures above and below a maximal concentration at around −10 ∘C, respectively. In an ensemble of control and disturbed simulations, the change in the average ice crystal concentration by biological INPs is not statistically significant, suggesting that PBAPs have no significant influence on the average state of the cloud ice phase. However, if the cloud top temperature is below −15 ∘C, PBAP can influence the cloud ice phase and produce ice crystals in the absence of other INPs. Nevertheless, the number of produced ice crystals is very low and it has no influence on the modeled number of cloud droplets and hence the cloud structure.

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“…For instance, several bioaerosol classes have been identified as important allergens and pathogens (Brown and Hovmøller, 2002;Yamamoto et al, 2012). Moreover, the role of bioaerosols as ice nuclei (IN) is a very actively debated topic since it may have major implications for cloud and precipitation formation and, thus, the hydrological cycle (Möhler et al, 2007;Morris et al, 2008;Hoose et al, 2010;Sahyoun et al, 2016;Du et al, 2017).…”

Section: S221 Primary Biological Aerosol Particlesmentioning

confidence: 99%

Supplementary material to "Long-term study on coarse mode aerosols in the Amazon rain forest with the frequent intrusion of Saharan dust plumes"

Morán-Zuloaga¹,

Ditas²,

Walter³

et al. 2017

Preprint

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On the usage of classical nucleation theory in quantification of the impact of bacterial INP on weather and climate

Cited by 18 publications

References 45 publications

Bioaerosol field measurements: Challenges and perspectives in outdoor studies

Bioaerosol field measurements: Challenges and perspectives in outdoor studies

Simulating the influence of primary biological aerosol particles on clouds by heterogeneous ice nucleation

Supplementary material to "Long-term study on coarse mode aerosols in the Amazon rain forest with the frequent intrusion of Saharan dust plumes"

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On the usage of classical nucleation theory in quantification of the impact of bacterial INP on weather and climate

Cited by 18 publications

References 45 publications

Bioaerosol field measurements: Challenges and perspectives in outdoor studies

Bioaerosol field measurements: Challenges and perspectives in outdoor studies

Simulating the influence of primary biological aerosol particles on clouds by heterogeneous ice nucleation

Supplementary material to &quot;Long-term study on coarse mode aerosols in the Amazon rain forest with the frequent intrusion of Saharan dust plumes&quot;

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Supplementary material to "Long-term study on coarse mode aerosols in the Amazon rain forest with the frequent intrusion of Saharan dust plumes"