Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-527
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
14 Jun 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Ecosystem–atmosphere exchange of microorganisms in a Mediterranean grassland: new insights into microbial flux through a combined experimental-modeling approach
Federico Carotenuto1,2, Teodoro Georgiadis2, Beniamino Gioli2, Christel Leyronas3, Cindy E. Morris3, Marianna Nardino2, Georg Wohlfahrt1, and Franco Miglietta2,4,5 1Institute of Ecology, University of Innsbruck, Sternwartestrasse 15, Innsbruck, A-6020, Austria
2Institute of Biometeorology (IBIMET), Consiglio Nazionale delle Ricerche (CNR), Via G. Caproni 8, I-50145, Firenze, Italy
3Plant Pathology Research Unit, French National Institute for Agricultural Research (INRA), Allée des Chênes 67, Montfavet, F-84143, France
4FoxLab, Joint Research Unit Fondazione Edmund Mach – CNR IBIMET, Via E. Mach 1, San Michele all'Adige, I-38010, Italy
5IMèRA, Universitè Aix-Marseille 2, Place le Verrier, Marseille, F-13004, France
Abstract. Microbial aerosols (mainly composed by bacterial and fungal cells), may constitute up to 74 % of the total aerosol volume. These biological aerosols are relevant not only from the point of view of the dispersion of pathogenic species, but also due to the potential geochemical implications. Some bacteria and fungi may, in fact, serve as cloud condensation or ice nuclei, potentially affecting cloud formation and precipitation and are active at higher temperatures compared to their, much more intensively studied, inorganic counterparts. Simulations of the impact of microbial aerosols on climate are still hindered by the lack of information regarding their emissions from ground sources. This work tackles this knowledge gap by (i) applying a rigorous micrometeorological approach to the estimation of microbial net fluxes above a Mediterranean grassland and (ii) developing a deterministic model to estimate these emissions on the basis of a few easily recovered meteorological parameters (the PLAnET model). The grassland itself is characterized by an abundance of positive net microbial fluxes and the model proves to be a promising tool capable of capturing the day-to-day variability in microbial fluxes with a relatively small bias and sufficient accuracy. PLAnET is still in its infancy and will benefit from future campaigns extending the available training dataset as well as the inclusion of ever more complex and critical phenomena affecting the release of microbial aerosol (such as rainfall). The model itself is also adaptable as an emission module for dispersion and chemical transport models, allowing to further explore the impact of microbial aerosols on the atmosphere and climate.

Citation: Carotenuto, F., Georgiadis, T., Gioli, B., Leyronas, C., Morris, C. E., Nardino, M., Wohlfahrt, G., and Miglietta, F.: Ecosystem–atmosphere exchange of microorganisms in a Mediterranean grassland: new insights into microbial flux through a combined experimental-modeling approach, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-527, in review, 2017.
Federico Carotenuto et al.
Federico Carotenuto et al.
Federico Carotenuto et al.

Viewed

Total article views: 354 (including HTML, PDF, and XML)

HTML PDF XML Total Supplement BibTeX EndNote
265 78 11 354 14 6 11

Views and downloads (calculated since 14 Jun 2017)

Cumulative views and downloads (calculated since 14 Jun 2017)

Viewed (geographical distribution)

Total article views: 354 (including HTML, PDF, and XML)

Thereof 351 with geography defined and 3 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 22 Aug 2017
Publications Copernicus
Download
Short summary
A new model was developed to simulate cultivable bioaerosols emissions. The model is able to reproduce the average daily behavior of a Mediterranean grassland and may help in studying the abundance of such aerosols in the atmosphere and their potential impact on clouds and cloud processes. The model has been developed thanks to a newfound application of an old micro-meteorological technique to measurements of cultivable microorganisms.
A new model was developed to simulate cultivable bioaerosols emissions. The model is able to...
Share