WP1 From nano to micro scales

WP1 starts from molecular models and advanced measurement techniques related to ice nucleation, atmospheric oxidation and phase transitions in vegetation.

Task 1.1 Atmospheric oxidation

This includes development of methods and techniques critical for advancing the process level understanding of atmospheric oxidation, in particularly the role of Criegee intermediates. The task develops novel quantified mass spectrometric techniques and nanocluster and particle physical and chemical characterization. These will provide quantified data on ppq-level mixing ratios of trace gases and oxidants relevant to aerosol formation and growth. Instrumental methods connecting carbon, nitrogen and sulfur cycles (carbonyl sulfide, amines, organosulfates, organonitrates) will also be developed.

Task 1.2 Phase transitions in the vegetation and in the atmosphere: Cavitation, freezing, nucleation and ice nucleation.

The task involves measurements and models describing the tree functions with respect to light, water and essential nutrients, freezing of cells, and emissions of biogenic volatile compounds, and chemical composition of 1–3 nm clusters and ions. This task determines the role of organic molecules (e.g amines) in atmospheric new-particle formation based on evaporation rates and stabilities of the clusters with variable atmospheric trace gas mixing ratios. We determine chemical and physical properties and the phase-state of biogenic SOA particles, and their importance on aerosol-cloud interactions and ice nucleation potential.

Task 1.3 Cluster dynamics and composition – Experimental and modeling approaches to nanoparticles

Modern and efficient methods and tools for chemical analysis of atmospheric ultrafine aerosols and gaseous emissions from the biosphere, novel environmental process models based on gas phase precursors marker compounds. The task reaches from the field applications to generation of true nano-materials in the laboratory and utilization of the atmospheric mass spectrometric methods for air/water/environmental quality/human health diagnostics.

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