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Aug 2026

Delayed Tropospheric Response over the East Asia–Northwest Pacific Sector to Arctic Stratospheric Polar Vortex Intensity Anomalies

Based on ERA5 reanalysis data (1979–2022) and sensitivity experiments with the WACCM climate model, this study examines the delayed tropospheric response over the East Asia–Northwest Pacific (EANP) region to stratospheric polar vortex intensity (PVI) anomalies. It is found that positive PVI anomalies in the lower str...

Chongyang Zhang, Jiankai Zhang, Yang Li et al. · 0 citations
Preprint Sep 2026

Long-term Variations of Cyclone-Influenced Exchange Flows in the Coastal Arctic in 2000-2025

Summertime synoptic weather regulates Arctic land-ocean exchange through meteorological tides during the ice-free period, when the predominantly easterly regime of the Beaufort High is punctuated by episodic Arctic cyclones, changing coastal winds to westerlies. We analyze wind-driven exchange flows in a northern Alask...

Chun-Yan Li · 0 citations
Open access Sep 2026

Multi-decadal convection permitting dynamical downscaling of current and future climates over South America

This paper reports on two sets of 22-year convection-permitting regional climate simulations conducted with the Weather Research and Forecasting model over the entirety of South America at 4-km grid spacing. The first simulation downscales the fifth-generation European Centre for Medium-Range Weather Forecasts atmosphe...

Chang-Hai Liu, Kyoko Ikeda, F. Dominguez et al. · 1 citation
Open access Aug 2026

Modulation of Stratosphere‐to‐Troposphere Transport of Ozone by North Pacific Weather Patterns

Stratosphere‐to‐troposphere transport (STT) of ozone is a major natural source of tropospheric ozone and is tightly linked to both stratospheric and tropospheric circulations. However, the complex interactions of drivers make it challenging to understand the subseasonal variability of STT. Here, we apply a weather patt...

Jaewon Lee, Yutian Wu, Simon H. Lee · 0 citations
Open access Sep 2026

Possible Mechanisms Linking North American Cold Waves to Arctic Sea Ice and Eurasian Snow Cover Interannual Variations

Stratospheric polar vortex (SPV) stretching events are typically of 1–2 weeks in duration when the SPV is elongated and locally extends anomalously south into lower latitudes. Such events are often associated with extreme cold over the Great Plains to southern and eastern states of the US. Here, we present an observati...

Song-Miao Fan, J. Cohen · 0 citations
Open access Aug 2026

Stratosphere–Troposphere Coupling During Cold Air Outbreaks in the Eastern United States

Cold air outbreaks (CAOs) are extreme weather events characterized by the equatorward displacement of polar air. This study investigates CAOs occurring along the East Coast of the US and establishes that approximately 16% are driven by stratosphere‐troposphere coupling through wave dynamics. Using ERA5 data, we show th...

Katherine Barragan, C. Stan · 0 citations

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