干旱区生态安全与可持续发展服务平台

The spatial-temporal patterns of spring phenology in the temperate grasslands of China and their response mechanisms to climatic factors

Tian, Ruikang ， Li, Jianhao ， Zheng, Jianghua ， Liu, Liang ， Liu, Yujia ， Han, Wanqiang ， Wang, Xinwei

2024-03-27 null null null(卷), null(期), (null页)

Understanding spring phenology dynamics in China's temperate grasslands is crucial for carbon cycle predictions. Using GIMMS NDVI data (1982-2014), we analyze SOS trends, considering climate variables. SOS advanced by 0.6 days/decade, with diverse trends across grassland types. TM advanced significantly (2.1 days/decade), TS and TDS showed non-significant changes. SOS correlates positively with temperature and radiation, negatively with precipitation and SPEI. Precipitation's impact is greatest (35%), followed by SPEI (30%), radiation (18%), and temperature (17%). Precipitation's significance increases in arid regions. These findings are vital for climate adaptation in arid and semi-arid ecosystems.

关键词

Spring phenology grassland climatic factors multiple linear regression

The spatial-temporal patterns of spring phenology in the temperate grasslands of China and their response mechanisms to climatic factors

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