Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41371389 |
| 近30年青藏高原高寒草甸返青期变化综合评估及其机理研究 | |
| 朱文泉 | |
| 主持机构 | 北京师范大学 |
| 开始日期 | 2014 |
| 结束日期 | 2017 |
| 资助经费 | 750000(CNY) |
| 项目类别 | 面上项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | Studying on the spatio-temporal change in green-up date of alpine meadow in the Qinghai-Tibet Plateau and its driving mechanism can enhance our understanding about the response of vegetation to climate change. Three typical types of alpine meadow (i.e. Kobresia pygmaea alpine meadow, Kobresia pygmaea-Polygonum sphaerostachyum alpine meadow, Kobresia pygmaea-Stipa purpurea alpine meadow) will be selected as the research subjects in this proposed project. We first carry out ground investigation and remote sensing monitoring about green-up date of alpine meadow, and develop a scale transformation method between them. Then a unified phenology mechanism model is parameterized and validated to simulate the green-up date of alpine meadow. Later, we carry out a comprehensive analysis about the spatio-temporal change in green-up date of alpine meadow in the Qinghai-Tibet Plateau during recent 30 years based on the results from ground investigation, remote sensing monitoring and model simulation. In order to understand the driving mechanism about the spatio-temporal change in green-up date of alpine meadow, we further quantitatively analyze the contribution of chilling temperature and forcing temperature with the parameterized phenology model. This proposed project is characterized in two aspects. Firstly, distinguishing from traditonal visual observation for ground green-up investigation,this proposed project designs a new ground green-up investigation method based on optical digital camera photos. Secondly, distinguishing from a single monitoring means, such as ground investigation or remote sensing monitoring, this proposed project integrates three monitoring means (i.e. ground investigation, remote sensing monitoring and model simulation) to carry out a comprehensive analysis about the spatio-temporal change in green-up date of alpine meadow in the Qinghai-Tibet Plateau during recent 30 years, and further analyzes its driving mechanism. |
| 中文关键词 | 物候期 ; 遥感监测 ; 模型模拟 ; 植被指数 ; 植物生态 |
| 来源机构 | 北京师范大学 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/345645 |
| 推荐引用方式 GB/T 7714 | 朱文泉.近30年青藏高原高寒草甸返青期变化综合评估及其机理研究.2014. |
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