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Identifier 000417158
Title Παγκόσμιες ατμοσφαιρικές προσομοιώσεις των πυρήνων συμπύκνωσης πάγου από θαλάσσια σωματίδια και ερημική σκόνη
Alternative Title Global atmospheric simulations of ice nuclei particles from marine organic aerosols and dust
Author Χατζηπαράσχος, Μάριος Ε.
Reviewer Μιχαλόπουλος, Νικόλαος
Νένες, Αθανάσιος
Abstract Aerosol-cloud interactions consist one the major sources of uncertainty in climate projections according to the recent IPCC report. The radiative properties and lifetime of clouds as well as precipitation rates are affected by the presence of particles enabling ice formation in mixed-phase clouds at higher temperatures than needed for homogeneous ice nucleation. These particles known as Ice Nucleating Particles (INPs) originate from terrestrial and marine environments. Among the most important ice nuclei is thought to be mineral dust aerosol from arid regions. Experimental studies indicate that K-Feldspar which contribute approximately three percent of total dust mass, dominate ice nucleation. Marine aerosols contain large amounts of organic material that are ejected into the atmosphere during bubble bursting through the sea surface microlayer that is enriched in organic matter. This organic aerosol from marine biological activity is a potentially significant source of marine INPs. In the present study we further develop the global 3-D chemistry transport model TM4-ECPL to account for INPs concentrations from marine organic aerosol and dust. The simulated distribution of INPs agrees better with available measurements when INPs concentrations are calculated accounting only for differences in air temperature and particle size. Our model shows that desert dust dominates the contribution to the INPs but marine organics play an important role in increasing INPs concentrations over remote oceans, dominating over the Southern Ocean.
Language Greek
Subject Global 3D-Chemical –transport model
Heterogeneous ice nucleation
Marine Organic Aerosol Particles
mineral Dust
Ατμοσφαιρικό μοντέλο
Ετερογενής πυρηνοποίηση
Θαλάσσια αερολύματα
Πυρήνες πάγου
Τρισδιάστατο μοντέλο χημείας και μεταφοράς παγκόσμιας κλίμακας
Issue date 2018-07-18
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Chemistry--Post-graduate theses
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