Boreal summer extratropical intraseasonal waves over the Eurasian continent and real-time monitoring metrics ...

• Main Authors: Yang, Jing, Zhu, Tao, Wang, Bin
• Format: Conference Object
• Language: English
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Okhotsk; North Atlantic
• Online Access: https://dx.doi.org/10.57757/iugg23-3157; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020603

<!--!introduction!--> Boreal summer extratropical intraseasonal oscillation (EISO) is crucial in modulating regional subseasonal variation and particularly causing extreme meteorological events, but it has yet to be well clarified and operationally monitored. This study first objectively sorts out three dominant EISOs trapped along two extratropical westerly jet streams over Eurasia, and then proposes the corresponding real-time metrics. The three dominant EISOs are (I) an 8–25-day eastward-propagating wave along the subtropical westerly jet (EISO-SJE) initiating at the exit of the North America–North Atlantic jet and strengthening over the Black Sea–Caspian Sea–arid central Asia; (II) a 10–30-day eastward-traveling wave along the polar front jet (EISO-PJE), starting near Scandinavia and enhancing from the Eastern European Plain to the Western Siberian Plain and then decaying over the Okhotsk region; (III) a 10–40-day westward-migrating wave along the polar front jet (EISO-PJW), which enhances near the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...