Characteristics of high-altitude jet streams during anomalous weather conditions in the Northern Hemisphere, using the example of July 2018 Evgeniya Durneva A.M. Obukhov Institute of Atmospheric Physics, Moscow Arctic and Antarctic Research Institute, St. Petersburg
Weather anomalies on July 2018 • The reason of temperature anomalies in the north part of Europe – anticyclone (blocking) growing over the Barents Sea at the beginning of July. • Blocking has formed due to the influence of the jet stream in the polar region and mid-latitude. Mean monthly field of temperature and sea level pressure, July 2018
Jet stream - relatively narrow bands of strong wind (more then 30 m/s) in the upper levels of the atmosphere. At the period of climate changes, Temperature gradient between polar regions particularly warming in the Arctic and equator is decreasing Characteristics of high-altitude jet streams during climate changes • The position of the polar jet stream relative to the North Pole • Intensity • High amplitude Geopotential field 400 hPa and jet stream, Geopotential field 300 hPa and jet stream, on 10 July Mean monthly geopotential field 400 hPa, July 2018 Geopotential field 400 hPa and jet stream, on 28 July on 28 July
Recommend
More recommend
