Arid Zone Research ›› 2023, Vol. 40 ›› Issue (3): 337-348.doi: 10.13866/j.azr.2023.03.01

• Weather and Climate • Previous Articles     Next Articles

Variation of mean maximum temperature from March to April since 1923 in the northern section of Lvliang Mountain recorded by tree rings

WANG Jiachuan1,2(),LI Shuheng1,2(),GUO Yili1,2,HAN Yijie1,2,MAO Zhonglei1,2   

  1. 1. College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, Shaanxi, China
    2. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi’an 710127, Shaanxi, China
  • Received:2022-06-27 Revised:2022-11-25 Online:2023-03-15 Published:2023-03-31

Abstract:

With the established standard chronology of the tree-ring width of Larix principis-rupprechtii in the Guancen Mountain in the northern section of Lvliang Mountain as basis, Pearson correlation analysis concluded that the average maximum temperature from March to April was the main controlling climate factor for the radial growth of trees in the study area (R = 0.509, P < 0.05). First-order linear regression equation was used to simulate and construct the change process of the average maximum temperature in the Guancen Mountains from March to April in the past nearly a century. The reconstructed equation was then cross-checked by the elimination method of leave-one-out test to verify its stability and reliability. Analysis of the temperature changes of the reconstructed temperature series showed that two warm periods and three cold periods in the past nearly a century in the Guancen Mountain area; the warm periods were 1932-1945 and 1957-1970, and the cold periods were 1946-1956, 1971-1983, and 1993-2010. Periodic analysis of the reconstructed temperature series based on Morlet wavelet analysis revealed periodic distribution characteristics of 3~5 a, 10~13 a, 22~33 a, and 40~45 a. El Niño-Southern Oscillation and sunspot activity were the drivers of this periodic variation. Large-scale spatial correlation analysis indicated that the reconstructed temperature series had a good spatial representation of temperature changes in large-scale regions such as central and eastern Russia, northern Japan, and central and eastern China. These results have important reference value for forest management and agriculture and animal husbandry development in Guancen Mountain area.

Key words: Larix principis-rupprechtii, tree-ring width, mean maximum temperature reconstruction, Guancen Mountain