Polar stratospheric clouds - Australian Antarctic Program
Polar stratospheric clouds (PSCs) play a central role in the formation of the ozone hole in the Antarctic and Arctic. PSCs provide surfaces upon which heterogeneous chemical reactions take place. These reactions lead to the production of free radicals of chlorine in the stratosphere which directly destroy ozone molecules PDF.
Polar stratospheric clouds (PSCs) are formed in the polar ozone layer when winter minimum temperatures fall below the formation temperature of about −78°C. This occurs on average for 1 to 2 months over the Arctic and 5 to 6 months over Antarctica (see heavy red and blue lines).
Polar stratospheric cloud - Wikipedia
In the Antarctic, temperatures below −88 °C (−126 °F) frequently cause type II PSCs. Such low temperatures are rarer in the Arctic. In the Northern hemisphere, the generation of lee waves by mountains may locally cool the lower stratosphere and lead to the formation of lenticular (lens-shaped) PSCs. Polar stratospheric cloud in Elverum, Norway.
Polar Stratospheric Clouds - NASA
2008年3月23日 · Scientists recently discovered that polar stratospheric clouds, long known to play an important role in Antarctic ozone destruction, are occurring with increasing frequency in the Arctic. These high altitude clouds form only at very low …
Polar Stratospheric Clouds: Satellite Observations, Processes, …
Polar stratospheric clouds (PSCs) play important roles in stratospheric ozone depletion during winter and spring at high latitudes (e.g., the Antarctic ozone hole). PSC particles provide sites for heterogeneous reactions that convert stable chlorine reservoir species to radicals that destroy ozone catalytically.
ESA - Stratospheric clouds over Antarctica - European Space …
2024年8月21日 · This image from the atmospheric lidar, captured on 2 August 2024, offers a profile of polar stratospheric clouds over Antarctica. The grey strip below, as featured in all of the images, is the corresponding area captured in the infrared by EarthCARE’s multispectral imager instrument, which gives natural visual context to all of the ...
Nasa Ozone Watch: Polar vortex facts
The persistent southern vortex has profound implications for polar ozone loss. Polar stratospheric clouds can form at temperatures below about 195 K. Chemical reactions on the surfaces of the particles that form these clouds convert chlorine compounds from …
Stratospheric clouds and gravity waves over Antarctica
2024年8月21日 · This image from the atmospheric lidar, captured on 2 August 2024, offers a profile of polar stratospheric clouds over Antarctica. The grey strip below, as featured in all of the images, is the corresponding area captured in the infrared by EarthCARE’s multispectral imager instrument, which gives natural visual context to all of the ...
New Insights into Polar Stratospheric Clouds - Eos
2021年10月18日 · PSCs play key roles in the chemical depletion of stratospheric ozone in the polar regions, the most prominent manifestation being the ozone “hole” that forms over Antarctica each September. With...
ACP - Investigating long-term changes in polar stratospheric clouds ...
2024年5月31日 · This study investigates the long-term changes in the polar stratospheric cloud (PSC) season from 1980 to 2021 above Antarctica. We analyzed CALIOP observations from 2006 to 2020 to build a statistical temperature-based model.