RT journal article
T1 Long-term seawater temperature records at Livingston and Deception Islands, Antarctica
A1 Luengo Sánchez, Olga
A1 Rosado Moscoso, Belén
A1 Jimenez Morales, Vanessa
A1 de Gil, Amos
A1 Gómez Enri, Jesús
A1 Bruno Mejías, Miguel
A1 Berrocoso Domínguez, Manuel
A2 Física Aplicada
A2 Matemáticas
K1 Seawater Temperature
K1 Time series
K1 Seasonal variation analysis
K1 South Shetland Islands
K1 Antarctica
K1 Orca seamount volcano
AB This study investigates seawater temperature patterns on Livingston and DeceptionIslands in Antarctica, where LIVMAR and DECMAR oceanographic stations arelocated, respectively. The research spans the period from 2015 to 2024, focusingon seasonal variations, long-term trends, and differences between the two stations.Seawater temperature data were analysed over a ten-year period, allowing for theexamination of seasonal cycles, temperature extremes, and anomalies. Particularattention was paid to identifying influences from local geophysical features such asvolcanic activity and glacial melt.Over these ten years,minimum temperatures havedecreased, with DECMAR notably failing to record temperatures below the freezingpoint during the last two winters. The analysis reveals pronounced seasonality inboth locations, with higher temperature peaks during the austral summer. DECMARconsistently registers higher maximum temperatures compared to LIVMAR,attributed to the volcanic activity of Deception Island. This volcanic influenceintroduces thermal anomalies, delays in minimum temperature occurrence, andgreater variability in summer signals due to increased subsurface water flow withinthe volcanic plumbing system. During the austral winters, the stations exhibitdistinct patterns. LIVMAR shows earlier and more variable temperature drops,while DECMAR demonstrates shorter but more stable freezing periods. Thesedifferences may result from freshwater input from the Johnson Glacier, whichmodifies local freezing conditions at Livingston Island, combined with thegeothermal influence of Deception Island. The study identifies an overall upwardtrend in seawater and air temperatures, aligning with global and regional climatechange patterns. The reduction in the frequency of extreme low temperatureevents that occurred between 2020 and 2022 during the volcano-tectonic event inthe Bransfield Strait due to the eruption of the Orca volcano highlights theenvironmental changes affecting the South Shetland Islands region. This workunderscores the importance of local geophysical processes, such as volcanicactivity and glacier melt, in the regional thermal dynamics. While the similaritiesbetween LIVMAR and DECMAR reflect overarching climatic drivers, the observeddifferences illustrate the complexity introduced by local factors.
PB Frontiers
SN 2296-7745
YR 2025
FD 2025
LK http://hdl.handle.net/10498/37937
UL http://hdl.handle.net/10498/37937
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026