How could phenological records from Chinese poems of the Tang and Song Dynasties (618-1279 AD) be reliable evidence of past climate changes? Yachen Liu1, Xiuqi Fang2, Junhu Dai3, Huanjiong Wang3, Zexing Tao3 5 1School of Biological and Environmental Engineering, Xi’an University, Xi’an, 710065, China 2Faculty of Geographical Science, Key Laboratory of Environment Change and Natural Disaster MOE, Beijing Normal University, Beijing, 100875, China 3Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science (CAS), Beijing, 100101, China 10 Correspondence to: Zexing Tao (
[email protected]) Abstract. Phenological records in historical documents have been proved to be of unique value for reconstructing past climate changes. As a literary genre, poetry reached its peak in the Tang and Song Dynasties (618–1279 AD) in China. Sources from this period could provide abundant phenological records in the absence of phenological observations. However, the reliability of phenological records 15 from poems as well as their processing methods remains to be comprehensively summarized and discussed. In this paper, after introducing the certainties and uncertainties of phenological information in poems, the key processing steps and methods for deriving phenological records from poems and using them in past climate change studies are discussed: (1) two principles, namely the principle of conservatism and the principle of personal experience, should be followed to reduce