Changes in Spring Phenology in the Three-Rivers Headwater Region from 1999 to 2013
作者： Xianfeng Liu , Xiufang Zhu , Wenquan Zhu , Yaozhong Pan , Chong Zhang
DOI: 10.3390/RS6099130
关键词:
摘要: Abstract: Vegetation phenology is considered a sensitive indicator of terrestrial ecosystem response to global climate change. We used satellite-derived normalized difference vegetation index investigate the spatiotemporal changes in green-up date over Three-Rivers Headwater Region (TRHR) from 1999 2013 and characterized their driving forces using climatic data sets. A significant advancement trend was observed throughout entire study area with linear tendency 6.3 days/decade ( p < 0.01); largest Yellow River source region (8.6 days/decade, 0.01). Spatially, increased southeast northwest, 87.4% pixels fell between 130th 150th Julian day. Additionally, about 91.5% experienced date, which 80.2%, mainly distributed areas coverage increase, advance. Moreover, it found that its were significantly correlated altitude. Statistical analyses showed 1-°C increase spring temperature would induce an 4.2 days. suggest TRHR might be attributable principally warmer wetter springs.
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