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Primary Biological Aerosol in the Atmosphere: Origins, Microphysical Processes, and Climatic Feedbacks

Descrizione del progetto

Uno studio valuta l’impatto delle particelle primarie di aerosol biologico sul clima

Le particelle primarie di aerosol biologico (PBAP) sono particelle aeree solide provenienti da organismi biologici. A seconda delle proprietà della superficie, le particelle possono servire da nucleo per goccioline d’acqua o cristalli di ghiaccio, portando alla formazione di nuvole e precipitazioni. Recenti studi hanno dimostrato che le concentrazioni di PBAP riportate nell’atmosfera sono altamente sottostimate. L’esecuzione di dettagliate misurazioni di emissioni PBAP e l’indagine sull’impatto delle particelle sui processi atmosferici microfisici e sul clima sono il principale obiettivo del progetto BIOAAT, finanziato dall’UE. Più specificatamente, il progetto mira a offrire previsioni più realistiche sul flusso delle emissioni e sulla dispersione di PBAP, nonché a valutare l’impatto di vari tipi di PBAP sulla formazione di nuvole di ghiaccio e delle precipitazioni.

Obiettivo

Primary biological aerosols particles (PBAP) are emitted from the land and marine surfaces into the atmosphere, where they were found to be abundant. The PBAP are of high importance because of their potential involvement on ice-nucleation (IN) and precipitation formation processes, with potential implications on the climate. Older studies showed that the total concentration of PBAP is smaller than other types of ice-nucleation particles, e.g. dust, while recent studies showed that the reported concentrations of PBAP are highly underestimated, thus, their IN activity and climatic impacts have large uncertainty. According to the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC), the PBAP-cloud interactions, as a part of aerosol-cloud interactions, are still the least understood factor in our current understanding of climate change. In addition, combating climate change and its impacts is one of the Sustainable Development Goals of the United Nations. Therefore, it’s crucial to carry out further investigations on the emissions of PBAP and their consequent atmospheric microphysical processes and climatic impacts and feedbacks, which is the main objective of BIOAAT. The BIOAAT aims to: (i) deliver more realistic prediction of the emission flux and dispersion of PBAP; considering all ecosystems and meteorological conditions that lead to high variation in quantifying their concentrations, distributions, and emission fluxes, (ii) close the gap between observations and modelling studies on the impact of different types of PBAP on cloud ice and precipitation formation, and contribute to reducing the uncertainty of aerosol-cloud interactions, and (iii) ultimately delivers open-source models that describe the emission flux and ice nucleation rates of PBAP that can easily be implemented in different types of atmospheric models including climate models to better estimate past, present and future climate and environmental impacts of PBAP.

Campo scientifico (EuroSciVoc)

Parole chiave

Programma(i)

Argomento(i)

Meccanismo di finanziamento

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Invito a presentare proposte

(si apre in una nuova finestra) H2020-MSCA-IF-2019

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Coordinatore

AARHUS UNIVERSITET
Contributo netto dell'UE
€ 219 312,00
Indirizzo
NORDRE RINGGADE 1
8000 Aarhus C
Danimarca
Regione
Danmark Midtjylland Østjylland
Tipo di attività
Higher or Secondary Education Establishments
Collegamenti
Costo totale
€ 219 312,00