Abrupt Change of Temperature and Precipitation in Mohe of China from 1958 to 2019

A multiscale examination of temperature and precipitation in Mohe from 1958 to 2019 was performed using the Ensemble Empirical Mode Decomposition (EEMD) method and the sliding average t-test method. The results showed that the annual average temperature in Mohe increased by 0.43°C (10 a)^－1 with the mid and late 1980s as the abrupt change points. The daily maximum temperature increased by 0.61°C (10 a)^－1 with the mid and late 1980s as the abrupt change points, while the daily minimum temperature increased by 0.21°C (10 a)^－1 with the early to mid 1980s and late 1990s as the multiple abrupt change points. Furthermore, the rainfall, nighttime rainfall, and daytime rainfall showed a similar change pattern from 1958 to 2019. The trend in the three types of rainfall obtained by EEMD was 14.05 mm (10 a)^－1, 7.71 mm (10 a)^－1, and 5.12 mm (10 a)^－1, respectively. No abrupt change points were detected for all types of precipitation. Both the EEMD and the linear trend analysis found an increase in temperature and precipitation, while the trends obtained by EEMD were greater than that by the linear method, which implies that the traditional linear analysis method underestimates the trends in temperature and precipitation in Mohe.