Day‐to‐Day Temperature Variability in China During Last 60 Years Relative to Arctic Oscillation. Issue 12 (25th November 2022)

• Record Type: Journal Article
• Authors: Wang, Xuejie; Wu, Guocan; Qin, Yanyan
• Is Part Of: Earth and space science. Volume 9:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-25
• Subjects: air temperature -- day‐to‐day variability -- Arctic Oscillation; Space sciences -- Periodicals; Geophysics -- Periodicals; 500.5
• DOI: 10.1029/2022EA002587
• Languages: English
• ISSNs: 2333-5084

Abstract

Abstract: Day‐to‐day (DTD) temperature variability is an important characteristic of air temperature and is closely related to the economy, ecology, and human health. According to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, the air temperature has increased particularly during the most recent decades. However, the temporal and spatial variations of DTD temperature variability have not been fully addressed. In this study, the DTD temperature variability is calculated using observed air temperature from meteorological stations in China. The regional and seasonal performances are evaluated among different climate regions and half‐year periods. In addition, the relationship between DTD temperature variability and the Arctic Oscillation (AO) is evaluated. The national mean DTD temperature variability in 1961–2020 during the warming (cooling) half‐year was 1.8°C (1.5°C), with minimum (maximum) values occurring in the southwestern (northeastern) regions of mainland China. Negative correlation was found between DTD temperature variability and the AO, particularly during the warming half‐year in the northern region. The national mean trends of DTD temperature variability were −0.003°C and −0.007°C per decade during warming and cooling half‐years, respectively, indicating that the inter‐day variation is decreasing under the background of global warming, which may be ecologically beneficial. These results could be of great significance in understanding temperature change and can be used to quantify land–atmosphere interaction and climate change. Plain Language Summary: This study aims to quantify the day‐to‐day (DTD) temperature variability over Chian during 1961–2020, which is an important characteristic of air temperature and is also closely related to the economy, ecology, and human health. The regional and seasonal performances are evaluated among different climate regions and half‐year periods. The national mean DTD temperature variability in 1961–2020 during the warming (cooling) half‐year was 1.8°C (1.5°C), with minimum (maximum) values occurring in the southwestern (northeastern) regions of mainland China. In addition, the relationship between DTD temperature variability and the Arctic Oscillation (AO) is evaluated. Negative correlation was found between DTD temperature variability and the AO, particularly during the warming half‐year in the northern region. The national mean of DTD temperature variability decreases during both warming and cooling half‐years, indicating that the inter‐day variation is decreasing under the background of global warming, which may be ecologically beneficial. Key Points: The mean day‐to‐day (DTD) temperature variability in 1961–2020 during the warming (cooling) half‐year was 1.8°C (1.5°C) Negative correlation was found between DTD temperature variability and Arctic Oscillation, particularly during the warming half‐year in the northern region The national mean of DTD temperature variability decreases during both warming and cooling half‐years