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While climate change is taking effect everywhere on Earth, the Arctic Circle is feeling its effects primarily, in the form of melting glaciers, melting ice sheets, and decreasing sea ice. Key players in climate change include clouds covering the Earth’s surface and microscopic aerosols in the air called ice core particles that seed the formation of ice in these clouds. This dance of ice cores, cloud cover and heat all play a major role in climate. But the all-important ice-forming aerosols, which can be mineral dust, microbes, or ocean spray, are rarely studied in the Arctic – where they need to be studied most – because little is known about their effects there, and not many scientists venture further north. . However, Colorado State University scientists did. In 2019, an intrepid team including atmospheric research scientist Jessie Creamean boarded a ship, sailed north, collected thousands of samples of air, seawater, sea ice, snow, and meltwater, and brought home the physica...

Many people are familiar with the hole in the ozone layer above Antarctica, but what is less known is that occasionally, the protective ozone layer in the stratosphere above the Arctic also disintegrates, depleting the ozone layer there. This last happened in the spring months of 2020, and before that, in the spring of 2011. Whenever the ozone layer is depleted, climate scientists then observe weather anomalies throughout the northern hemisphere. In central and northern Europe, Russia and especially in Siberia, spring is very warm and dry. In other areas, such as the polar regions, however, wet conditions prevail. This weather anomaly is especially noticeable in 2020. Switzerland is also unusually warm and dry that spring. Whether there is a causal relationship between the destruction of stratospheric ozone and the observed weather anomalies is a matter of debate in climate research. Polar eddies in the stratosphere, which form in winter and decay in spring, also play a role. Sci...

6 July 2022 Reviewed by Alex Smith A new study of observed temperatures reveals that the Arctic appears to be warming four times faster than the rate of global warming. The trend has increased sharply twice in the last five decades. This is a finding that all but four of the 39 climate models missed. Image Credit: Shutterstock.com/ Tomas Rebro Thirty years is considered the minimum time to represent climate change . We reduced the time interval to 21 years. On a smaller time scale and, contrary to previous investigations which found that the Arctic amplification index increased smoothly, we observed two distinct steps, one in 1986 and the second in 1999. . Petr Chylek, Lead Author of the Study, Physicist and Climate Researcher, Los Alamos . National Laboratory The study was reported in the journal Geophysical Research Letter. Decade-by-decade episodic trends defined by Chylek and his collaborators tend to have an impact on global sea levels and weather, which precisely projectin...