The largest ice desert has the fewest ice nuclei worldwide
Leibniz Institute for Tropospheric Research (TROPOS)Peer-Reviewed Publication
Leipzig. There are fewer ice nuclei in the air above the large ice surfaces of Antarctica than anywhere else in the world. This is the conclusion reached by an international research team led by the Leibniz Institute for Tropospheric Research (TROPOS) based on filter measurements of cloud particles at three locations in Antarctica. These are the first of their kind on the continent. The data now published fills a knowledge gap and could explain the large proportion of supercooled liquid water in the clouds of the southern polar region. Clouds containing liquid water droplets reflect sunlight more strongly than clouds containing ice. Fewer ice nuclei and less ice in the clouds could contribute to the southern hemisphere not warming as much as the northern hemisphere, the researchers write in the journal Geophysical Research Letters.
It has long been known that the clouds over the Southern Ocean around Antarctica contain more water and less ice than comparable clouds in the Northern Hemisphere. However, without details on the causes and measurement series, climate models based on data from the Northern Hemisphere cannot be adjusted. The measurements of ice nuclei now provide an important detail for this. Further data will be provided by flights of the German research aircraft HALO, whose HALO-South mission ended in New Zealand in mid-October, as well as a series of Antarctic expeditions planned for 2026-2030 as part of the major international research project "Antarctica InSync".
- Journal
- Geophysical Research Letters
- Funder
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, German Research Foundation (DFG), Belgian Science Policy Office, Spanish Ministry of Economy, German Research Foundation (DFG)