首页|Quantitative response of vegetation phenology to temperature and precipitation changes in Eastern Siberia

Quantitative response of vegetation phenology to temperature and precipitation changes in Eastern Siberia

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Significant changes to the world's climate over the past few decades have had an impact on the development of plants.Vegetation in high latitude regions,where the ecosys-tems are fragile,is susceptible to climate change.It is possible to better understand vegeta-tion's phenological response to climate change by examining these areas.Traditional studies have mainly investigated how a single meteorological factor affects changes in vegetation phenology through linear correlation analysis,which is insufficient for quantitatively revealing the effects of various climate factor interactions on changes in vegetation phenology.We used the asymmetric Gaussian method to fit the normalized difference vegetation index(NDVI)curve and then used the dynamic threshold method to extract the phenological pa-rameters,including the start of the season(SOS),end of the season(EOS),and length of the season(LOS),of the vegetation in this study area in the Tundra-Tagar transitional zone in eastern and western Siberia from 2000 to 2017.The monthly temperature and precipitation data used in this study were obtained from the climate research unit(CRU)meteorological dataset.The degrees to which the changes in temperature and precipitation in the various months and their interactions affected the changes in the three phenological parameters were determined using the GeoDetector,and the results were explicable.The findings demonstrate that the EOS was more susceptible to climate change than the SOS.The vegetation phe-nology shift was best explained by the climate in March,April,and September,and the com-bined effect of the temperature and precipitation had a greater impact on the change in the vegetation phenology compared with the effects of the individual climate conditions.The re-sults quantitatively show the degree of interaction between the variations in temperature and precipitation and their effects on the changes in the different phenological parameters in the various months.Understanding how various climatic variations effect phenology changes in plants at different times may be more intuitive.This research provides as a foundation for research on how global climate change affects ecosystems and the global carbon cycle.

phenologyclimate changeSiberiaasymmetric Gaussian functionGeoDetector

WEN Kege、LI Cheng、HE Jianfeng、ZHUANG Dafang

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State Key Laboratory of Resources and Environment Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 100049,China

Nanjing Agricultural University,Nanjing 210095,China

International Cooperation and Exchange of the National Natural Science Foundation of ChinaMajor Special Project-The China High-Resolution Earth Observation System

4206113401930-Y30F06-9003-20/22

2024

10.1007/s11442-024-2208-0

地理学报(英文版)
中国地理学会,中国科学院地理科学与资源研究所

地理学报(英文版)

CSTPCD
影响因子：1.307
ISSN：1009-637X
年,卷(期)：2024.34(2)
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