湿度遗留影响影响东亚生态系统的植被生产力,2001-2020年
Pingping Zheng1, Mark Henderson2, Binhui Liu1
1College of Forestry, The Northeast Forestry University, Harbin, China.
Frontiers in plant science
|August 22, 2025
概括
东亚的生长季度总初级生产率 (GPP) 整体上升,但在2014年左右出现分歧. 大气湿度的遗留效应,特别是相对湿度,显著影响了植被的生产力和碳储存.
科学领域:
- 生态学
- 气候科学
- 遥感技术
背景情况:
- 生长季度的初级生产率 (GPP) 是生态系统健康和碳封存的关键指标.
- 了解气候与植被之间的关系对于预测生态系统对全球变化的反应至关重要.
研究的目的:
- 研究2001年至2020年东亚GPP的时空模式.
- 研究气候变量对不同植被类型的GPP的影响.
- 在2014年左右确定显著GPP分歧的驱动因素.
主要方法:
- 使用MODIS卫星数据来提取GPP和现象参数.
- 综合卫星数据与气象记录进行趋势和相关性分析.
- 使用统计方法评估气候与GPP的关系,并确定关键因素.
主要成果:
- 总体GPPGS显著增加 (4.12Gh/m2/年),而叶落式宽叶森林 (DBF) 的生产率最高.
- 2014年左右发生了分歧,草原和叶树林 (DNF) 的增长率下降,而DBF继续增加.
- 相对湿度 (RH),特别是从前一年,是GPP的主要驱动因素,解释了观察到的差异.
结论:
- 大气湿度的遗留效应,特别是RH,是植被生产力的关键驱动因素,并解释了2014年的GPP分歧.
- 增加大气干燥和温度对植被存储碳和生态系统服务构成风险.
- 为了在全球变暖下保持生态系统的生产力, 水的可用性越来越重要.
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