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The East Asian Subtropical Jet Stream and Atlantic Tropical Cyclones

Author(s): Zhang, Wei; Villarini, Gabriele; Vecchi, Gabriel A

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Abstract: Atlantic tropical cyclones (TCs) can cause significant societal and economic impacts, as 2019's Dorian serves to remind us of these storms' destructiveness. Decades of effort to understand and predict Atlantic TC activity have improved seasonal forecast skill, but large uncertainties still remain, in part due to an incomplete understanding of the drivers of TC variability. Here we identify an association between the East Asian Subtropical Jet Stream (EASJ) during July–October and the frequency of Atlantic TCs (wind speed ≥34 knot) and hurricanes (wind speed ≥64 knot) during August–November based on observations for 1980–2018. This 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 (80–20°W, 10–20°N).
Publication Date: 8-Jul-2020
Citation: Zhang, Wei, Gabriele Villarini, and Gabriel A. Vecchi. "The East Asian Subtropical Jet Stream and Atlantic Tropical Cyclones." Geophysical Research Letters 47, no. 15 (2020). doi:10.1029/2020GL088851.
DOI: doi:10.1029/2020GL088851
ISSN: 0094-8276
EISSN: 1944-8007
Type of Material: Journal Article
Journal/Proceeding Title: Geophysical Research Letters
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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