Evolution of meteorological factors during 1980–2015 in the Daqing River Basin, North China

Abstract

Precipitation and temperature data, such as the homogeneity, trend, abrupt change, and periodicity, obtained at 40 meteorological stations in the Daqing River Basin from 1980 to 2015 are analyzed using the Mann–Kendall method, anomaly accumulation, Rescaled range analysis (R/S analysis) and wavelet transform. The regularity of climate change is studied to provide guidelines for the rational utilization of water resources. The results show that the annual precipitation has an insignificant upward trend and suddenly changes in 2007. The precipitation evolution can be divided into three types of periodicity, that is, 22–32, 8–16, and 3–7 year time scales, where the 28 year scale is the first main period of precipitation change. The annual average temperature shows a notable upward trend, with 1992 as the change year. The annual average temperature can be divided into three types of periodicity, that is, the 25–32, 14–20, and 5–10 year time scales, where the 28 year scale is the first main period of temperature change. In conclusion, the climate of the Daqing River Basin gradually turns into humid and hot climate. The results provide valuable reference for the assessment of the effects of climate change, and the management of water resources. HIGHLIGHTS The evolution of precipitation and temperature is analyzed, including the homogeneity, trend, abrupt change, and periodicity, making use of the anomaly accumulation, Rescaled range analysis, Mann–Kendall method and wavelet transform in the Daqing River Basin, North China.; The conclusion is that the climate of the Daqing River Basin gradually turns into humid and hot.;

Keywords

• abrupt change
• periodicity
• precipitation
• temperature
• trends