An-Yi Huang (He/Him/His)

PhD Student at Oregon State University Studying Clouds

Research Highlights

2022 Pakistan Floodings

(1) La Niña enhanced the WNPSH and the low-level easterly anomalies (black arrows). (2) Tropical–extratropical interaction: Europe blocking-associated cold-dry northerly wind (blue dotted arrows) converged with the warm-wet southerly flow (red dotted arrows) over Pakistan. The H-L-H indicates the high-level atmospheric teleconnection pattern linking Europe and China heatwaves and Pakistan flooding, which appeared persistently in August and more transiently in July when heavy rainfall occurred in Pakistan. (3) Enhanced southerly from the Arabian Sea, which was intensified by an upward trend in recent decades (yellow large arrow under red dotted arrows). (4) Topographic lifting effect (black arrows with upward curve) intensified upward motion over Pakistan. The gray-filled triangles represent mountains.

In the summer of 2022, Pakistan experienced severe flooding due to record rainfall, displacing over 30 million people, while heatwaves persisted in central China and Europe. Our analysis links these events to compounding factors, including La Niña-induced easterlies, intense southerlies from the Arabian Sea, and interactions between extratropical and tropical systems. Wave activity flux and regression analyses revealed a distinct Rossby wave-like pattern connecting these extremes, differing from previously reported patterns. The 2022 floods were an intensified version of the 2010 event, driven by similar but increasingly pronounced factors. [Full Article]

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Himawari Real Time Image (from CWA)

Time: 13:10 (UTC+8) 07/24/2024

Typhoon: Gaemi (Category 4-equivalent)

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