Effects of Recurving Western North Pacific Tropical Cyclones on Downstream Ridges over Pacific-Western North America

Authors

• Xiaoyu Bai, Washington State University School of the Environment Vancouver WA USA
• Dmitri A. Kalashnikov, University of California Merced Sierra Nevada Research Institute Merced CA USA
• Paul Loikith, Portland State UniversityFollow
• Siiri Bigalke, Portland State University
• Alex Mitchell, Department of Atmospheric & Environmental Sciences State University of New York at Albany Albany NY USA
• Mingfang Ting, Columbia University Columbia Climate School Palisades NY USA
• Lance F. Bosart, State University of New York at Albany
• Deepti Singh, Washington State University

Author ORCID Identifier(s)

Xiaoyu Bai (0000-0003-2736-0500)

Dmitri A. Kalashnikov (0000-0002-2777-4909)

Paul Loikith (0000-0002-2352-0565)

Siiri Bigalke (0000-0002-4397-8223)

Alex Mitchell (0000-0003-4277-2706)

Mingfang Ting (0000-0002-4302-4614)

Deepti Singh (000000016568435)

Published In

Geophysical Research Letters

Document Type

Article

Publication Date

5-13-2026

Abstract

Recurving tropical cyclones (TC) in the Western North Pacific can affect the atmospheric circulation over Pacific‐Western North America (PWNA) via interactions with the midlatitude circulation. Using reanalysis and tropical cyclone best‐track data, we examine how recurving TCs that make extratropical transition modulate 500‐hPa ridge characteristics over PWNA during the peak (June‐September) and late (October–December) seasons. TCs recurving at lower latitudes are associated with more intense and poleward‐centered ridges relative to TCs recurving at higher latitudes, and TCs that recurve farther west are associated with relatively westward‐centered ridges. Characteristics of the prevailing midlatitude flow such as its amplitude and positioning relative to the recurving TCs also affect PWNA ridge characteristics, determine whether the flow is amplified or dampened following TC‐midlatitude interactions. Our study highlights multiple factors shaping the diversity of midlatitude circulation responses to recurving TCs, which are relevant for predicting downstream ridge characteristics and their associated surface extremes.

Rights

Copyright (c) 2026 The Authors

This work is licensed under a Creative Commons Attribution 4.0 International License.

Locate the Document

https://doi.org/10.1029/2025GL120410

DOI

10.1029/2025GL120410

Persistent Identifier

https://archives.pdx.edu/ds/psu/44711

Publisher

American Geophysical Union (AGU)

Citation Details

Bai, X., Kalashnikov, D. A., Loikith, P., Bigalke, S., Mitchell, A., Ting, M., Bosart, L. F., & Singh, D. (2026). Effects of Recurving Western North Pacific Tropical Cyclones on Downstream Ridges Over Pacific‐Western North America. Geophysical Research Letters, 53(10). Portico. https://doi.org/10.1029/2025gl120410