Launch of the 31st Ukrainian Antarctic Expedition: Documenting Unprecedented Climate Shifts

On March 26, 2026, the 31st Ukrainian Antarctic Expedition (UAE) officially commenced its operations at the Akademik Vernadsky station, marking a formal transition of authority from the outgoing 30th UAE team. This handover represented a historic milestone for Ukraine’s polar research program, as meteorologist Anzhelika Ganchuk became the first woman to lead a mission in the nation's history. During the ceremony, she accepted the symbolic key to the station from the previous expedition leader, Oleksandr Poludionnyi. Located on Galindez Island within the Argentine Islands archipelago, the Akademik Vernadsky station has served as a vital international research hub since its transfer from the United Kingdom to Ukraine in 1996.

The departing 30th UAE team left behind an extensive repository of scientific data, with particularly striking findings regarding the atmospheric ozone layer, which has been under continuous observation since 1957. Researchers highlighted the earliest recorded closure of the ozone hole over the Antarctic Peninsula, which took place on December 1, 2025. This early recovery, marking the second consecutive year of record-low ozone depletion levels, is tentatively linked to the long-term effectiveness of the 1987 Montreal Protocol. However, scientists cautioned that the period between 2020 and 2023 was characterized by unusually deep ozone depletion, necessitating further rigorous analysis to understand these fluctuations.

In addition to ozone monitoring, the station’s measurements confirm a steady and concerning warming trend within the regional marine environment. Throughout the 2025 season, sea water temperatures near the station never once dropped below the critical freezing threshold, an unprecedented occurrence since the current observation record began in 2002. Furthermore, a stable sea ice cover failed to form around the station in 2025, resulting in the third-lowest level of ice activity recorded in the history of satellite monitoring. For context, during the previous decade, periods where temperatures fell below -1.8°C could last as long as 148 days, yet in 2024 and 2023, these intervals were reduced to a mere 4 and 10 days, respectively.

The 31st UAE team, comprised of 14 dedicated specialists, will focus their efforts on a comprehensive suite of studies in the fields of geophysics, meteorology, and biology. Their mission includes the continuation of vital international partnerships, such as joint scientific projects with members of the First Mexican Antarctic Expedition. Such collaborations underscore the deep integration of Ukrainian science into the global polar research consortium. The data series collected at the station are among the longest-running in Antarctica and are essential for tracking large-scale planetary processes and environmental shifts.

The impact of climate change in the region is also visible in the changing physical landscape and local wildlife behavior. For example, the Penola Strait, which separates Galindez Island from the Antarctic coast, has not frozen enough to allow for ski crossings since 2019, a feat that was previously a regular occurrence. Over the past 80 years, the average annual temperature at the station has risen from approximately -5.5°C to current values ranging between -1.8°C and 2°C. This significant warming trend is closely monitored by scientists, who have noted a direct correlation between these rising temperatures and the increasingly early hatching of Gentoo penguin chicks in the surrounding colonies.