The applicability of reanalysis data has been widely addressed in climate and hydrology studies over the past two decades. In this study, we analyzed spatiotemporal variations in ERA-Interim temperature data from four climate zones within Gansu Province from 1979 to 2017 by using linear regression model and Mann-Kendall mutation test. Results showed that: (1) The highest temperature was found in the subtropical monsoon climate zone, and the lowest in the plateau mountain climate zone. Temperatures in high-elevation regions were lower than those in low-elevation regions; (2) The annual mean temperature increased across Gansu Province from 1979 to 2017. The lowest warming rates of annual mean, annual maximum, and annual minimum temperatures were found in the subtropical monsoon climate zone, and these were 0.334, 0.300, and 0.336 °C/10a, respectively. The highest warming rates of annual mean and annual minimum temperature were found in the temperate monsoon climate zone, and these were 0.420 and 0.464 °C/10a, respectively. The highest warming rate of annual maximum temperature was found in the temperate continental climate zone (0.471 °C/10a); (3) The Mann-Kendall analysis showed that the mutation times of annual mean temperature of the subtropical monsoon, temperate monsoon, and temperate continental climate zones in Gansu Province were all in 1997. The mutation times of annual maximum temperature were found in the subtropical monsoon climate zone (1997) and temperate monsoon climate zone (1997). The mutation times of annual minimum temperature were found in the temperate continental climate zone (1997) and plateau mountain climate zone (1994). ERA-Interim reanalysis data are reliable for capturing mutation time of temperature, especially in the high-elevation areas with rare meteorological station. This study can provide a reference when analyzing climate change at different climatic zones using reanalysis data.

Peng Zhao

Zhibin He

Atmosphere

ATMOSPHERE (ISSN 2073-4433) 是一本国际性和跨学科的与大气相关的科学研究的学术期刊。它发表评论、定期研究论文、通讯和简短的笔记，并且对论文的长度没有限制。我们的目标是鼓励科学家尽可能详细地发表他们的实验和理论研究。必须为研究文章提供完整的实验和/或系统细节。

Atmosphere is an international and interdisciplinary academic journal focused on scientific research related to the atmosphere. The journal publishes comments, regular research papers, communications, and short notes, with no restrictions on the length of submissions. Our aim is to encourage scientists to share their experimental and theoretical research in as much detail as possible. Research articles must provide comprehensive experimental and/or systematic details.

《Atmosphere》是一本国际性、跨学科的学术期刊，专注于与大气相关的科学研究。期刊发表评论、定期研究论文、通讯和简短的笔记，且对论文的长度没有限制。我们的目标是鼓励科学家尽可能详细地分享他们的实验和理论研究。研究文章必须提供完整的实验和/或系统细节。

Temperature Change Characteristics in Gansu Province of China

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Journal Info

Category	Quartile
METEOROLOGY & ATMOSPHERIC SCIENCES	4