Observed changes in temperature extremes for the Beijing–Tianjin–Hebei region of China

Abstract

As one of the most significant threats facing the world, climate change has already been manifested everywhere in the form of frequent extreme climate events (e.g. heat waves, floods, droughts and wildfires) and has caused serious impacts on all aspects of the living environment. Due to the regional variability of global climate change, understanding the ongoing climatic changes at a local scale is very important for decision makers and resource managers to develop appropriate mitigation and adaptation strategies against the changing climate. In this study, recent changes in extreme temperature indices (including frost days, summer days, icy days, tropical nights, growing season length, cool nights and warm nights, cool days and warm days, and daily temperature range) over the Beijing-Tianjin-Hebei (BTH) region of China were investigated in the context of global warming. The results indicate that the historical trends of these extreme temperature indices are statistically significant in Huailai, Beijing, Leting and Shijiazhuang while no significant trends are reported in Chengde, Tianjin and Cangzhou−Potou. By comparing results between coastal and inland stations, it is found that the changes in temperature extremes in inland stations are less significant than the changes in coastal stations. The results also suggest that the indices based on minimum temperature show decreasing trends while those for maximum temperature present increasing trends. Furthermore, mutation tests were performed for all indices in order to understand when the changes were initiated. An apparent mutation point (mostly in the 1980s) is detected for most of the analysed temperature indices. This may be caused by the wide implementation of the reform and opening policy in the early 1980s to boost economic development in the BTH region.

Spatiotemporal Trend Analysis of Precipitation Extremes in Ho Chi Minh City, Vietnam During 1980–2017

“…In the aforementioned studies, extreme precipitation indices as recommended by the Expert Team on Climate Change Detection and Indices (ETCCDI) and parametric and non-parametric statistic tests (for example, Mann-Kendall test, Sen's slope, and Pettit tests) were applied to detect the trends in precipitation extremes in different temporal scales. Additionally, this approach has been broadly used for studies on trend analysis of climatology in recent years (Wang et al 2016;Zhang et al 2017).…”

Spatial and Temporal Variations in Extreme Precipitation and Temperature Events in the Beijing–Tianjin–Hebei Region of China over the Past Six Decades

“…Zhao et al have investigated the temporal and spatial features of precipitation in the BTHR using observational data for 1965-2014 [19]. Zhang et al have observed changes in extreme temperature events at eight meteorological stations in the BTHR [20]. Clearly, considering the rapid development occurring in the BTHR, a comprehensive examination of temporal trends in extreme precipitation and temperature events and their spatial heterogeneities using up-to-date and long-term observations is necessary to formulate adaptive strategies for extreme climate events.…”

Long-term Drought Reconstruction for Beijing since the Ming Dynasty (1368 - 2019)

“…(Figure 3a), with increasing temperatures (Zhang et al 2017), but is not reflected over the longer timeframe presented here .…”

“…After the Western Zhou Dynasty (approximately ~1046-771 BC), the inscription of bronze Dynasty (317-420 AD) paper became much widely used for records, which is the main source for many of the ancient books (Needham and Tsuen-Hsuin 1985;Zhang 2004b).…”