Global S&T Development Trend Analysis Platform of Resources and Environment
项目编号 | 1763284 |
Local and nonlocal topographic controls on landscape ecohydrology | |
Amilcare Porporato | |
主持机构 | Princeton University |
项目开始年 | 2017 |
2017-09-01 | |
项目结束日期 | 2018-07-31 |
资助机构 | US-NSF |
项目类别 | Standard Grant |
项目经费 | 127665(USD) |
国家 | 美国 |
语种 | 英语 |
英文摘要 | The overarching goal of this research is the statistical quantification of the relative importance of local vs. nonlocal geomorphologic controls on landscape metabolism in complex topographies differing in hydroclimatic forcing and geologic age, and the quantification of their degree of nonlinearity and threshold effects. The research is guided by the hypothesis that the relative importance of local and nonlocal topographic effects on landscape metabolism shifts according to hydroclimatic conditions. Moreover, the conditions for such shifts change with the landscape age and the related surface smoothing processes, which modify the relative importance of tails vs. mode of the distributions of topographic properties (aspect, slope, contributing area, etc.). The research will provide a theoretical description of landscapes using statistical field theories, and analyze local and nonlocal controls on CN cycles (radiation, soil features, vegetation cover, and soil moisture dynamics). Finally it will couple local and nonlocal controls to biogeochemical dynamics, extending previous stochastic soil moisture and biogeochemistry models to include spatially random components. The fundamental environmental processes controlling vegetation and soil nutrient dynamics and the related carbon and nitrogen fluxes (also called landscape metabolism) are related to the land energy and water budgets. This research analyzes such processes and quantifies how they differ in space and time, as a function of the local and nonlocal landscape features, such as slope, orientation and drainage area. This proposal will pave the way to a more fundamental understanding of the laws for carbon, nitrogen, and water fluxes at different spatial scales over complex landscapes such as river basins and mountain regions. The project will be instrumental for the quantification of the land surface conditions for global climate models, especially in the contexts of variation in climatic and land-use scenarios. |
文献类型 | 项目 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/71700 |
专题 | 环境与发展全球科技态势 |
推荐引用方式 GB/T 7714 | Amilcare Porporato.Local and nonlocal topographic controls on landscape ecohydrology.2017. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Amilcare Porporato]的文章 |
百度学术 |
百度学术中相似的文章 |
[Amilcare Porporato]的文章 |
必应学术 |
必应学术中相似的文章 |
[Amilcare Porporato]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论