使用GOSIF数据模拟新疆的植被现象学:研究对干旱的累积和滞后反应
Cong Xue1, Mei Zan2, Shunfa Yang2
1College of Geography Science and Tourism, Xinjiang Normal University, Urumqi 830017, China; College of Geography and Remote Sensing, Hohai University, Nanjing 211000, China; Xinjiang Laboratory of Lake Environment and Resources in the Arid Zone, Urumqi 830017, China.
Journal of environmental management
|December 12, 2025
概括
全球气候变化影响新疆
科学领域:
- 遥感和地球观测 遥感和地球观测
- 生态与环境科学 生态与环境科学
- 气候变化科学 气候变化科学
背景情况:
- 气候变化加剧干旱的频率和严重程度,影响干旱地区的植被现象学.
- 新疆干旱区由于干旱模式发生变化而面临重大生态挑战.
- 了解植被现象学转变对于干旱生态系统管理至关重要.
研究的目的:
- 分析新疆植被现象学 (季节开始和季节结束) 的时空演变.
- 量化干旱对植被现象学的累积和滞后影响.
- 评估不同植被类型的干旱耐受性特征.
主要方法:
- 利用太阳诱导光 (SIF) 数据,MODIS 现象学产品,以及标准化降水蒸发指数 (SPEI).
- 从2001年到2020年,提取的植被是赛季开始 (SOS) 和赛季结束 (EOS).
- 对干旱影响和抗旱能力进行了定量分析.
主要成果:
- 与SOSEVI和EOSEVI相比,SOSGOSIF的植被延迟了13天,EOSGOSIF的植被提前了24天.
- 整体植被SOS显示进步,而EOS在新疆表现出延迟的趋势.
- SOSGOSIF对1个月的累积干旱影响有2个月的滞后反应;EOSGOSIF对6个月的干旱有1个月的滞后反应敏感.
- 草地SOSGOSIF显示出最强的恢复,而灌木地EOSGOSIF显示出最高的干旱弹性.
结论:
- GOSIF数据为监测新疆的植被现象学提供了优势.
- 干旱对干旱植被现象有显著的累积和滞后影响.
- 各种植被类型的多样性抗旱能力为干旱地区的生态恢复提供了基础.
相关概念视频
02:41Responses to Drought and Flooding
11.9K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.9K
01:57Adaptations that Reduce Water Loss
27.8K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.8K
02:45Responses to Heat and Cold Stress
14.6K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
14.6K
02:16Light Acquisition
9.3K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.3K
02:02Responses to Salt Stress
14.2K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.2K