Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091615 |
A physics‐based universal indicator for vertical decoupling and mixing across canopies architectures and dynamic stabilities | |
O. Peltola; K. Lapo; C. K. Thomas | |
2021-02-16 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Air flows may be decoupled from the underlying surface either due to strong stratification of air or due to canopy drag suppressing cross‐canopy mixing. During decoupling, turbulent fluxes vary with height and hence identification of decoupled periods is crucial for the estimation of surface fluxes with the eddy‐covariance (EC) technique and computation of ecosystem‐scale carbon, heat, and water budgets. A new indicator for identifying the decoupled periods is derived using forces (buoyancy and canopy drag) hindering movement of a downward propagating air parcel. This approach improves over the existing methods since 1) changes in forces hindering the coupling are accounted for and 2) it is based on first principles and not on ad‐hoc empirical correlations. The applicability of the method is demonstrated at two contrasting EC sites (flat open terrain, boreal forest) and should be applicable also at other EC sites above diverse ecosystems (from grasslands to dense forests). |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/315644 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | O. Peltola,K. Lapo,C. K. Thomas. A physics‐based universal indicator for vertical decoupling and mixing across canopies architectures and dynamic stabilities[J]. Geophysical Research Letters,2021. |
APA | O. Peltola,K. Lapo,&C. K. Thomas.(2021).A physics‐based universal indicator for vertical decoupling and mixing across canopies architectures and dynamic stabilities.Geophysical Research Letters. |
MLA | O. Peltola,et al."A physics‐based universal indicator for vertical decoupling and mixing across canopies architectures and dynamic stabilities".Geophysical Research Letters (2021). |
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