Climate for Station: Ulleungdo, North Gyeongsang, Korea, South

Ulleungdo's climate is characterized by a warming trend over the long term, with a noticeable cooling in the past decade. Precipitation patterns have shifted towards a more even distribution, reflecting broader regional climate goals for stability.

Geographic Influence and Climate Classification

Ulleungdo, an island located at 37.483°N, 130.9°E, falls under the Köppen climate classification of Cfa, indicating a humid subtropical climate. This classification is influenced by its maritime position in the East Sea, which moderates temperature extremes and contributes to high humidity levels. The island's rugged terrain, characterised by volcanic origins, plays a pivotal role in shaping its microclimates, where elevation can lead to cooler temperatures and varied precipitation patterns.

Temperature Trends: A Tale of Two Timeframes

Examining the temperature trends reveals a nuanced narrative. Over the past decade, there has been a cooling trend with highs decreasing by 0.24°C (0.43°F) and lows by 0.04°C (0.07°F). This contrasts with the all-time trends, where highs have risen by 0.13°C (0.23°F) and lows by a more pronounced 0.35°C (0.63°F). This indicates a longer-term warming pattern, despite recent cooling, which could be attributed to natural variability or localised climatic factors.

Precipitation Patterns: A Shift Towards Evenness

The Precipitation Concentration Index (PCI) for Ulleungdo has decreased from a baseline of 12.70 to a current value of 11.26. This reduction suggests a more even distribution of rainfall events across the year, moving away from concentrated, extreme precipitation episodes. Such a shift aligns with South Korea's regional climate objectives, which aim to mitigate the impacts of intense rainfall and reduce the risk of flooding and landslides.

Temperature Extremes: Records in Context

Ulleungdo's recorded temperature extremes highlight the island's climatic variability. The highest temperature on record is 39.7°C (103.5°F), while the lowest is -13.6°C (7.5°F). These figures underscore the island's capacity to experience significant thermal oscillations, despite its generally moderate climate, influenced by its maritime setting.

Regional Climate Goals and Recent Weather Events

South Korea's commitment to addressing climate change is evident in its efforts to stabilise regional climates, including Ulleungdo's. Recent weather events, such as typhoons and heavy rainfall, have tested these initiatives. The island's evolving climate profile, marked by a long-term warming trend and more evenly distributed precipitation, reflects both the challenges and progress in adapting to a changing climate landscape.