Temperature and Concentration Affect Particle Size Upon Sublimation of Saline Ice: Implications for Sea Salt Aerosol Production in Polar Regions

0564221 - ÚPT 2023 RIV US eng J - Článek v odborném periodiku
Závacká, Kamila - Neděla, Vilém - Olbert, Martin - Tihlaříková, Eva - Vetráková, Ľubica - Yang, X. - Heger, D.
Temperature and Concentration Affect Particle Size Upon Sublimation of Saline Ice: Implications for Sea Salt Aerosol Production in Polar Regions.
Geophysical Research Letters. Roč. 49, č. 8 (2022), č. článku e2021GL097098. ISSN 0094-8276. E-ISSN 1944-8007
Grant CEP: GA ČR(CZ) GA19-08239S; GA ČR(CZ) GA22-25799S
Institucionální podpora: RVO:68081731
Klíčová slova: sea salt aerosols * ozone depletion * sublimation * microscopy * eutectic temperature * bromine explosion
Obor OECD: Climatic research
Impakt faktor: 5.2, rok: 2022
Způsob publikování: Open access
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL097098

Using an environmental scanning electron microscope, we quantified for the first time aerosol-sized salt particles formed during the sublimation of sea ice as a function of temperature and concentration. The sublimation temperature of the ice is a dominating physical factor to determine the size of the residua: Below20 degrees C, micron-sized pieces of salt emerge, whereas above the temperature large chunks of salt are detected. Another such aspect influencing the distribution of sizes in salt particles is the concentration: Micron-sized particles are observed exclusively at salinities below 3.5 psu, while below 0.085 psu particles with a median smaller than 6 mu m arise from sea ices at any subzero temperature. Moreover, when a chunk of salt sublimes at less than30 degrees C to be dried and warmed later, a large number of sub-micron crystals will appear. We relate our findings to the production of the polar atmospheric sea salt aerosols.
Trvalý link: https://hdl.handle.net/11104/0335930