Dec 9, 2024 · Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere, typically occurring around 30,000 feet (9,100 meters) in elevation. Within jet streams, the winds blow from west to east, but the band often shifts north and south because jet streams follow the boundaries between hot and cold air. Since thes

Sep 18, 2017 · By modifying the jet streams, El Niño and La Niña can affect temperature and precipitation across the United States and other parts of the world. The influence on the U.S. is strongest during the winter (December-February), but it may linger into early spring.

Sep 29, 2023 · The jet stream, a fast, narrow current of air flowing from west to east high up in the atmosphere, is the mechanism connecting ENSO to North American winter climate patterns.

May 21, 2024 · The polar jet stream and polar vortex are two rings of fast-moving air around the Arctic, which play a large role in world weather patterns. Many climate scientists believe that global warming is changing these rings, in ways that allow freezing air from the Arctic to intrude on the warmer mid-latitude regions.

6 days ago · A deep dip in the jet stream brought Arctic air to the South, where it collided with moisture from the Gulf of Mexico.

Oct 4, 2023 · A winter pattern known as a wave-4—globally, four peaks and four matching troughs —tend to lock in place. The authors say that when this happens, the chances of extreme cold or wet in the trough triples.

Jan 15, 2025 · The polar jet stream exists year-round and can cause winter cold snaps on its own. But during the winter, it is joined by a second atmospheric phenomenon dubbed the polar vortex.

Oct 4, 2023 · The study’s authors say they have identified giant meanders in the global jet stream that bring polar air southward, locking in frigid or wet conditions concurrently over much of North America...

Oct 23, 2024 · This study analyzes the intensification trend of the North Atlantic jet using the ERA5 reanalysis and investigates the dynamical mechanisms involved. The results highlight the importance of an increase in diabatic heating in the free troposphere below the jet entrance over the Gulf Stream sector.

Jan 17, 2025 · The intensification of winter stationary waves across western North America presents a critical problem in climate dynamics, given its profound implications for regional hydroclimate changes.