Atlantic hurricanes linked to weather system in East Asia

Science Daily  August 7, 2020
A team of researchers in the US (University of Iowa, Princeton University) has identified an association between the East Asian Subtropical Jet Stream (EASJ) during July–October and the frequency of Atlantic tropical cyclones during August–November based on observations for 1980–2018. According to the researchers the Rossby waves hitch a ride on the EASJ to the North Atlantic when tropical cyclones in the Atlantic are most likely to form. The waves affect wind shear, a key element in the formation of tropical storms. Rossby waves form within the Earth’s oceans and atmosphere because of the planet’s rotation. The strong association is tied to the impacts of EASJ on a stationary Rossby wave train emanating from East Asia and the tropical Pacific to the North Atlantic, leading to changes in vertical wind shear in the Atlantic Main Development Region…read more. TECHNICAL ARTICLE