Author

Y. Chikamoto

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Open access Oct 2026

Circulation Pattern Associated With Record 2025–26 North American Winter May Become More Common

The 2025–26 late‐fall and winter climate pattern featured an extreme upper‐tropospheric zonal geopotential height gradient across North America, consisting of an amplified west ridge and an east trough, which produced record warmth and low snowpack across the western United States alongside severe cold and winter sto...

Zachary F. Johnson, Y. Chikamoto, S. Rahimi et al. · Earth's Future · 0 citations

Open access Aug 2026

The role of tropical inter-basin interactions in initiating the 2020–2023 La Niña: a hindcast-based predictability study

The recent triple-dip La Niña event from 2020 to 2023 in the equatorial Pacific, which occurred without a preceding strong El Niño, challenges the traditional understanding of multi-year La Niña dynamics governed solely by the recharge oscillator theory. This study investigates the mechanisms behind the initiation of t...

Nahid A. Hasan, Y. Chikamoto, Wei Zhang et al. · Climate Dynamics · 0 citations