Federal Rural University of Rio de Janeiro, Department of Environmental Sciences, Km 07, Zona Rural, BR-465, 23890-000 Seropédica, RJ, Brazil.
Federal Institute of Southeast Minas Gerais, Campus Barbacena, R. Monsenhor José Augusto, 204, São José, 36205-018 Barbacena, MG, Brazil.
An Acad Bras Cienc. 2024 Jul 29;96(suppl 2):e20230743. doi: 10.1590/0001-3765202420230743. eCollection 2024.
Ground temperature's sensitivity to climate change has garnered attention. This study aimed to monitor and analyze temporal trends and estimate Active Layer Thickness from a monitoring point at Fildes Peninsula, King George Island, in Antarctica. Quality control and consistency analysis were performed on the data. Methods such as serial autocorrelation, Mann-Kendall, Sen-Slope, Pettitt, and regression analysis tests were applied. Spearman's correlation examined the relationship between air temperature and ground depths. The active layer thickness was estimated using the maximum monthly temperature, and the permafrost lower limit used the minimum monthly temperature. Significant summer seasonal trends were observed with Mann-Kendall tau, positive Sen-Slope, and Pettitt slope at depths of 67.5 and 83.5 cm. The regression analysis was significant and positive for all ground depths and in different seasons. The highest correlation (r=0.82) between air temperature and surface ground depth was found. Freezing prevailed at all depths during 2008-2018. The average Active Layer Thickness (ALT) was 92.61 cm. Temperature is difficult to monitor, and its estimation is still complex. However, it stands out as a fundamental element for studies that refer to the impacts of climate change.
地面温度对气候变化的敏感性引起了关注。本研究旨在监测和分析时间趋势，并从南极洲乔治王岛菲尔德斯半岛的一个监测点估算活动层厚度。对数据进行了质量控制和一致性分析。应用了序列自相关、Mann-Kendall、Sen 斜率、Pettitt 和回归分析测试。Spearman 相关性检验了气温与地面深度之间的关系。使用最大月平均温度估算活动层厚度，使用最小月平均温度估算永久冻土下限。在 67.5 和 83.5 cm 深度处，Mann-Kendall tau、正 Sen 斜率和 Pettitt 斜率观察到夏季季节趋势显著。回归分析在所有地面深度和不同季节均显著且为正。在空气温度和地表地面深度之间发现了最高的相关性(r=0.82)。2008-2018 年期间，所有深度均为冻结状态。平均活动层厚度(ALT)为 92.61 cm。温度难以监测，其估算仍然复杂。然而，它作为涉及气候变化影响的研究的基本要素而引人注目。
