Can Arctic Sea Ice Impact Hong Kong’s Weather? Dr. Cen Wang Explains

By Cen Wang 22 January, 2026

From polar vortex surges to sea level rise, atmospheric scientist Dr. Wang's research explores the deep connections between the Arctic & Asia's coastal cities

Variations in Arctic sea ice & polar vortex behaviour can cascade through the atmosphere to influence weather in Asia, e.g. HK's historic cold wave in 2016
A natural fluctuation of the North Atlantic Oscillation is temporarily buffering Arctic sea ice melt but this may reverse in 2030-40 to trigger accelerated ice loss
Therefore, the current 10-20 year window is critical for decisive global climate action & robust adaptation planning – connecting ice to our daily lives is crucial to getting there
Author: Cen Wang
Dr. Cen Wang is currently a Postdoctoral Fellow in the JC STEM Lab of Convection and Precipitation at The Hong Kong University of Science and Technology, under the supervision of Prof. Hui Su in the Department of Civil and Environmental Engineering. He earned his Ph.D. from the University of Science and Technology of China. His research focuses on climate dynamics, particularly the mechanisms behind Arctic sea ice anomalies. He investigates how mid-to-high-latitude atmospheric internal variability and tropical ocean forcing drive these anomalies, and further explores the impacts of Arctic sea ice changes on extreme cold events in mid-latitude regions. Dr. Wang has published over 10 SCI papers as first author, including notable publications in Nature Communications and Science Advances.
Read more from Cen Wang →

Researchers at HKUST’s CliMet Lab find that when the Arctic experiences atmospheric disruptions, its effects can be felt all the way in subtropical Asia. Today, postdoc researcher Dr. Cen Wang explains their findings on Arctic sea ice variability and why it matters for Hong Kong people. 

CWR: First off, congratulations on your latest publication on Nature Communications. It’s rare to see research on the cryosphere originating from Hong Kong. What inspired you?

Dr. Cen Wang (CW): Thank you for your kind congratulations. Indeed, Hong Kong is geographically far from the polar regions. Yet from an atmospheric science perspective, physical distance is largely irrelevant – the Earth’s climate system is deeply interconnected.

HK is far away from the polar regions but its 2016 cold wave was linked to a southward surge of Arctic air

The Arctic, in particular, acts as a key regulator of Northern Hemisphere climate patterns, serving as the primary source region for cold air masses. Variations in Arctic sea ice and polar vortex behavior can trigger atmospheric teleconnections with direct downstream effects. A pertinent local example is the historic cold wave Hong Kong experienced in 2016. Such extreme cold events are often linked to disruptions in the Arctic system, which can allow polar air to surge southward.

This fundamental understanding – that disturbances in the remote cryosphere can cascade through the atmosphere and directly influence weather and climate variability in our part of the world – was the core scientific inspiration for my research. It drives my focus on polar processes, aiming to better predict and understand the forces that shape our regional climate resilience.

Furthermore, recognizing that sea ice melt contributes to rising sea levels, which in turn threatens coastal regions like Hong Kong, reinforces the urgent need to study these interconnected cryosphere changes and their broader societal impacts.

CWR: Your research shows that Arctic sea ice melt has slowed down in the past decade but could accelerate rapidly after 2030-40. What explains this and what are its implications?

CW: The recent slowdown in Arctic sea ice loss is closely tied to natural climate variability – specifically, a shift of the North Atlantic Oscillation (NAO) into a positive phase in the early 2010s. This pattern reduced the heat and moisture over the Arctic, temporarily offsetting the long-term melt trend driven by global warming.

NAO shifts have helped slow down sea ice losses…

…offering a critical 10-20 year window for decisive climate action

However, this represents only a temporary pause. Climate projections indicate the NAO will likely revert to a negative phase after 2030–2040. Once that occurs, the current climatic buffer will diminish, and coupled with ongoing warming, this could trigger accelerated ice loss. Without substantial emissions reductions, this could unleash interconnected climate risks within a decade or two. Thus, the current slowdown offers a critical 10-20 year window for decisive global climate action.

Based on our other research, changes in Arctic sea ice are closely linked to extreme cold events in mid-latitude regions, with impacts showing a tendency to extend toward lower latitudes. Therefore, Hong Kong is likely to be affected.

CWR: Is this trend also happening in Antarctica? Are you exploring research there?

CW: We are closely monitoring Antarctic changes as well. Currently, Antarctic sea ice is still undergoing rapid decline. Our analysis indicates that this trend is strongly influenced by tropical ocean variability. Notably, we have identified an important role for troposphere-stratosphere coupling in mediating this remote connection. This part of our work is currently undergoing peer review.

CWR: Accelerating ice losses only mean that sea level rise will speed up, which is very worrying for coastal cities like Hong Kong. But more research on ice dynamics could help inform better adaptation decisions. Are there efforts on this front to help build coastal resilience?

CW: Absolutely. Our findings on the recent Arctic slowdown are not merely an academic observation – they reveal a critical 10-20 year climatic buffer period driven by natural variability, offering a finite window for actionable response.

The State Key Laboratory of Climate Resilience for Coastal Cities aims to help adapt coastal city infrastructure

At the newly launched State Key Laboratory of Climate Resilience for Coastal Cities, we could integrate insights from ice dynamics to support coastal resilience planning. Inaugurated in December 2025, this lab is jointly hosted at HKUST and PolyU and is dedicated to enhancing infrastructure resilience in Hong Kong as well as coastal cities in the Chinese Mainland and worldwide.

Our work translates global cryosphere signals into localized risk assessments for cities like Hong Kong. We investigate how polar changes may alter local extreme weather patterns and examine how sea-level rise interacts with land subsidence. By incorporating this science into coastal hazard modeling and infrastructure vulnerability assessments, we can help develop robust adaptation strategies and early-warning systems tailored to the region.

CWR: Clearly, everything is connected, yet ice caps are out of sight and out of mind. How do we get Hong Kong people to care about ice, or encourage more cryosphere research from Hong Kong?

CW: The key lies in making polar change relevant to Hong Kong’s daily life and long-term future.

Accessible science comms can make ice science more relevant to people in HK

First, through accessible science communication – using short videos, public talks, and media interviews – we can illustrate how Arctic ice loss influences local weather extremes and how melting sea ice contributes to sea-level rise, which in turn leads to greater storm surges during typhoons, thereby posing a threat to coastal cities like Hong Kong. This approach brings the science closer to personal experience. Complementing this, immersive tools like data visualizations, virtual reality expeditions, or exhibits at the Hong Kong Science Museum can help the public “see” ice melt in near real-time.

Second, we should emphasize socio-economic stakes – for instance, how emerging Arctic shipping routes could reshape Hong Kong’s role as a global trade hub. By framing the cryosphere as both a climate issue and a strategic economic factor, we can engage policymakers and business leaders, foster broader consensus, and channel Hong Kong’s strengths in earth observation and smart-city innovation into targeted polar research. When ice becomes a matter of lived experience, economic interest, and scientific opportunity, it transforms from a distant concern into a local priority.

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