Spatiotemporal variations of SU25 and ID0 in the Shandong Peninsula and associated large-scale circulation factors

• Published in: Theoretical and applied climatology Vol. 155; no. 1; pp. 71 - 84
• Main Authors: Guo, Yuhong, Yan, Xiaodong, Xie, Wenqiang, Gao, Zhibo, Song, Shuaifeng
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 2024; Springer Nature B.V
• Subjects: Aquatic Pollution; Arctic Oscillation; Atlantic Oscillation; Atmospheric Protection/Air Quality Control/Air Pollution; Atmospheric Sciences; Climate change; Climatic extremes; Climatic indexes; Climatology; Cold; Correlation; Daily temperatures; Datasets; Earth and Environmental Science; Earth Sciences; Heat; Icing; Latitude; Longitude; Maximum temperatures; Teleconnections; Temperature; Temperature data; Waste Water Technology; Water Management; Water Pollution Control; SU25; Large-scale circulation factor; ID0; Contribution rate; Spatiotemporal variability
• ISSN: 0177-798X; 1434-4483
• DOI: 10.1007/s00704-023-04583-1

Interpreting changes in climate extremes indices and related large-scale teleconnection factors is critical to addressing intensified climate change. The spatiotemporal trend in SU25 (summer days) and ID0 (icing days), as well as the contribution rates of large-scale circulation factors, were investigated using daily maximum temperature data from 93 stations in the Shandong Peninsula and 8 metrics of large-scale teleconnections from 1961 to 2017. The results showed that SU25 increased significantly while ID0 decreased significantly in the Shandong Peninsula during the study period. SU25 ranged from 66.3 to 155.1 days and gradually declined from inland to coast. ID0 ranged from 4.7 to 24.8 days and decreased roughly from north to south. SU25 had a significant negative correlation with longitude, while the trend of SU25 had a significant positive correlation with longitude. ID0 had a significant positive correlation with both latitude and longitude, while the trend of ID0 had a significant negative correlation with both latitude and longitude. The abrupt years of SU25 were concentrated in 1965, 1976, 1977, 1994, 2007, and 2012, respectively. The change point of ID0 at each station was most concentrated in 1970, 1972, 1986, and 1988, respectively. In the future, SU25 in most stations will continue to increase, while ID0 in almost all the stations will decrease. The Atlantic Multidecadal Oscillation (AMO) was the most important factor influencing SU25 change. Both the Arctic Oscillation (AO) and AMO made significant contributions to the ID0 change. The combined results of the two factors were usually greater than the results of the single circulation factor, and the contributions to SU25 and ID0 were mostly nonlinear enhancement.