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| DOI | 10.1029/2019MS001806 |
| A Big Root Approximation of Site-Scale Vegetation Water Uptake | |
| Bouda M. | |
| 发表日期 | 2019 |
| ISSN | 19422466 |
| 起始页码 | 4597 |
| 结束页码 | 4613 |
| 卷号 | 11期号:12 |
| 英文摘要 | Land surface model (LSM) predictions of soil moisture and transpiration under water-limited conditions suffer from biases due to a lack of mechanistic process description of vegetation water uptake. Here, I derive a “big root” approach from the porous pipe equation for root water uptake and compare its predictions of soil moistures during the 2010 summer drought at the Wind River Crane site to two previously used Ohm's law analog plant hydraulic models. Due to a fuller representation of pressure gradients and flows within a complex root system architecture, the new formulation achieves somewhat improved fit and significantly lower bias compared to the Ohm's law analog models. A key advantage of the improved physical representation is the increased robustness of fits and predictions, making it less liable to overfitting. This new mechanistic model advances our understanding of vegetation water limitation at site scale with potential to improve LSM predictions of soil moisture, temperature and surface heat, water, and carbon fluxes. ©2019. The Authors. |
| 英文关键词 | root system architecture; root water uptake; soil moisture; surface fluxes; transpiration; upscaling |
| 语种 | 英语 |
| scopus关键词 | Computer architecture; Forecasting; Hydraulic models; Surface measurement; Transpiration; Vegetation; Land surface models; Mechanistic modeling; Process descriptions; Root system; Root-water uptake; Summer droughts; Surface flux; Upscaling; Soil moisture; flux measurement; hydrological modeling; root system; soil moisture; transpiration; water uptake; United States; Wind River; Wyoming |
| 来源期刊 | Journal of Advances in Modeling Earth Systems
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/156789 |
| 作者单位 | Faculty of Forestry and Wood Sciences, Czech University of Life Sciences in Prague, Prague, Czech Republic |
| 推荐引用方式 GB/T 7714 | Bouda M.. A Big Root Approximation of Site-Scale Vegetation Water Uptake[J],2019,11(12). |
| APA | Bouda M..(2019).A Big Root Approximation of Site-Scale Vegetation Water Uptake.Journal of Advances in Modeling Earth Systems,11(12). |
| MLA | Bouda M.."A Big Root Approximation of Site-Scale Vegetation Water Uptake".Journal of Advances in Modeling Earth Systems 11.12(2019). |
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