Acta Geographica Sinica ›› 2023, Vol. 78 ›› Issue (9): 2241-2255.doi: 10.11821/dlxb202309008

• Global Change Impact and Adaptation • Previous Articles     Next Articles

Response of vegetation phenology to extreme climate and its mechanism

ZHANG Jing1(), HAO Fanghua2, WU Zhaofei1, LI Mingwei1, ZHANG Xuan1, FU Yongshuo1()   

  1. 1. College of Water Sciences, Beijing Normal University, Beijing 100875, China
    2. College of Urban and Environmental Sciences, Central China Normal University, Wuhan 430079, China
  • Received:2023-06-30 Revised:2023-08-20 Online:2023-09-25 Published:2023-09-28
  • Contact: FU Yongshuo E-mail:zhangj1127@mail.bnu.edu.cn;yfu@bnu.edu.cn
  • Supported by:
    National Science Fund for Distinguished Young Scholars(42025101);International Cooperation and Exchanges of NSFC(42261144755)

Abstract:

Global climate change caused by human activities results in frequent extreme climate events, and shifts the physiological processes of plants, and the carbon, water cycle and energy balance of terrestrial ecosystems. Vegetation phenology is the most sensitive biological indicator to climate change. In recent years, the responses of vegetation phenology to climate change mainly focus on the mean state of the climate, while the response mechanisms of vegetation phenology to extreme climate are still unclear. In this paper, the response of vegetation spring and autumn phenology to various extreme climatic events and their mechanisms were reviewed. We found that extreme low temperature and extreme precipitation directly delayed the vegetation green-up date and advanced the leaf senescence, while extreme high temperature and extreme drought led to stomatal closure, inhibited photosynthesis and transpiration, and thus advanced leaf senescence at middle and high latitudes of the Northern Hemisphere. Currently, the studies on the response of vegetation phenology to extreme climate events pay less attention to compound extreme climate events, and there are only few studies on the lag effect of vegetation phenology response to extreme climate events and the recovery process of vegetation after the occurrence of extreme events. Under future climate change scenarios, it is necessary to modify the vegetation phenological models by considering the impact of extreme climate events and couple it into the dynamic global vegetation models to improve the simulation accuracy of the carbon cycle in terrestrial ecosystems.

Key words: vegetation phenology, extreme climatic events, response mechanism, compound extreme events, lagged effect