Arid Zone Research ›› 2023, Vol. 40 ›› Issue (10): 1537-1546.doi: 10.13866/j.azr.2023.10.01

• Weather and Climate • Previous Articles     Next Articles

Spatial-temporal evolution and impact factors during the climatic growing season in the Yellow River Basin from 1960 to 2020

ZHANG Zhigao1(),SUN Zixin2,ZHANG Xiuli3,GUO Kexin4,LI Zhuoya1,HAO Haijiao1,CAI Maotang5()   

  1. 1. School of Resources Environment and Tourism, Anyang Normal University, Anyang 455000, Henan, China
    2. School of Geography and Environment, Henan University, Kaifeng 475004, Henan, China
    3. Yellow River Civilization and Sustainable Development Research Center, Henan University, Kaifeng 475001, Henan, China
    4. College of Earth Science and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China
    5. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
  • Received:2023-01-30 Revised:2023-05-24 Online:2023-10-15 Published:2023-11-01

Abstract:

Data from 89 meteorological stations in the Yellow River Basin from 1960 to 2020 was used in this investigation. The Mann-Kendall mutation test as well as Morlet wavelet and correlation analyses were conducted to assess the spatial and temporal change characteristics and influencing factors at the beginning of the growing season (GSS), the end of the growing season (GSE), and the length of the growing season (GSL), as well as days with an active accumulated temperature of ≥10 ℃ (AT10) and active accumulated temperature of ≥10 ℃ (DT10) during the growing season. From 1960 to 2020 the GSS significantly advanced at a rate of -2.04 d·(10a)-1, while the GSE showed a delayed trend with a change rate of 0.85 d·(10a)-1, and the GSL was significantly prolonged at a rate of 2.88 d·(10a)-1; there were also significant regional differences. The GSS in the lower reaches of the Yellow River Basin was the earliest (February 23), while that in the upper reaches was the latest (March 30). Furthermore, the GSE in the upper reaches ended early (October 24), while that in the lower reaches was the latest (November 30), and the GSL in lower reaches was the longest (334.03 d), while that in the upper reaches was the shortest (297.33 d). The significant extension of GSL was mainly due to the significant advance of GSS. Over the past 61 years, the growth season indices were found to have a main period of approximately 28 a in the Yellow River Basin. GSS, AT10, and DT10 mutated in 1998, and GSL mutated in 2002. The changing trends for the growth season indices in the upper, middle, and lower reaches of the Yellow River Basin were consistent, with the largest change occurring in the lower reaches, followed by the upper and middle reaches, respectively. Correlation analyses showed that GSS advances in the Yellow River Basin were mainly related to spring warming over the past 61 years, and the delay of GSE was mainly due to autumn warming, the extension of GSL in the upstream and downstream areas was mainly due to spring warming, and the extension of GSL into the middle reaches was mainly related to autumn warming.

Key words: growing season, spatial-temporal variations, trend, seasonal temperature, the Yellow River Basin