Written in white: What snow reveals about air and water quality

  • Date: –14:00
  • Location: Geocentrum Hambergsalen
  • Lecturer: Christian M. Zdanowicz, Ph.D.
  • Organiser: Institutionen för geovetenskaper
  • Contact person: Christian Zdanowicz
  • Docentföreläsning

The Department of Earth Sciences hereby invite all interested to a docent (associate professorship) lecture in subject Physical Geography.


In winter, perennial and seasonal snow covers as much as 45 million km2 of the Earth's surface, and melting snow supplies about one half of the world's freshwater. Athough it is mostly frozen water, snow also contains many impurities, including contaminants, that are trapped and deposited from the air. Because the winter snow cover is so extensive, it provides a convenient sampling medium to scientists interested in air quality, and how it impacts surface water quality. In this lecture, different facets of this subject will be presented, covering topics as diverse as snow darkening by soot from forest fires, the trans-Oceanic transport of air pollutants, and the chemistry of mercury in the polar atmosphere.

The lecture is an obligatory teaching test for those applying for admittance as docent (associate professor) and it should be possible for students and others with basic academic education in the relevant field to follow it. The lecture will last for 45 minutes and afterwards the audience may ask questions. The lecture will be given in English.

Chairperson: Professor Veijo Pohjola

Representative of the Associate Professorship Board: Professor Hemin Koyi