Analysis of trends of meteoclimatic characteristics at Enderby Land, East Antarctica based on land observations data and reanalysis

• Published in: Arctic and Antarctic Research
• Main Authors: S. V. Salivonchyk, S. V. Kakareka, С. В. Саливончик, С. В. Какарека
• Other Authors: The work was carried out within the framework of the State programs “Monitoring of the polar regions of the Earth, development of the Belarusian Antarctic station and supporting the activities of polar expeditions for 2016–2020” and “Development of the activities of the Belarusian Antarctic station” for 2021–2025, Работа выполнена в рамках Государственных программ «Мониторинг полярных районов Земли, создание Белорусской антарктической станции и обеспечение деятельности полярных экспедиций на 2016–2020 годы» и «Развитие деятельности белорусской антарктической станции» на 2021–2025 гг.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институт 2022
• Subjects: температура воздуха; air temperature; climate trends; Molodezhnaya station; reanalysis; wind speed and direction; климатические тренды; ряды реанализа; скорость и направление ветра; станция Молодежная; East Antarctica; Molodezhnaya; Molodezhnaya Station; Rae; Antarc*; Antarctic Science; Antarctica; Arctic; Enderby Land; Polar Record; Антарктика
• Online Access: https://www.aaresearch.science/jour/article/view/443; https://doi.org/10.30758/0555-2648-2022-68-2-142-159

The article studies the presence and possible direction of climate change in Enderby Land, East Antarctica, where from 1963 to 1999, the only meteorological station of the WMO network operated at the Molodezhnaya research station (now the summer field base of the RAE), and now an automatic meteorological station has been installed. The trends in surface air temperature, wind speed and direction for the period from the mid-1960s to the present have been analyzed. As initial data, we used the results of ground-based observations at the Molodezhnaya station, as well as reanalysis datasets, which made it possible to complete the instrumental series and evaluate the dynamics of temperature and wind characteristics for the last decades. Monthly values of climatic parameters were used as initial values, but for wind characteristics presented as the V and U components of the speed vector, single values were taken, according to which the average monthly wind speeds and wind distributions in directions were estimated. From different reanalysis systems, by comparison with ground-based observations, series were selected that showed the greatest similarity in the dynamics of the climatic characteristics studied. Good agreement was found between the temperature series of observations at the Molodezhnaya meteorological station and the datasets UDEL_AirT, ERA5, and GISS. The correlation between the wind observation series is less strong; ERA5 reanalysis data shows the wind speed dynamics slightly better. According to the analysis of the long-term dynamics of average annual and monthly temperatures in the region of Enderby Land, the warming trend has not been statistically confirmed, however, a progressive increase in the number of months of the year with positive temperature dynamics has been noted. Based on the analysis of wind characteristics, it is shown that only an increase in average annual wind speeds of 0,1–0,3 m/s/10 years is statistically significant. В работе исследуются наличие и направленность климатических ...