GSTDTAP  > 气候变化
DOI10.1002/2018GL077021
Intrinsic Constraints on Asymmetric Turbulent Transport of Scalars Within the Constant Flux Layer of the Lower Atmosphere
Li, Dan1; Katul, Gabriel G.2,3; Liu, Heping4
2018-02-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2018
卷号45期号:4页码:2022-2030
文章类型Article
语种英语
国家USA
英文摘要

A widely used assumption in boundary layer meteorology is the z independence of turbulent scalar fluxes F-s throughout the atmospheric surface layer, where z is the distance from the boundary. This assumption is necessary for the usage of Monin-Obukhov Similarity Theory and for the interpretation of eddy covariance measurements of F-s when using them to represent emissions or uptake from the surface. It is demonstrated here that the constant flux assumption offers intrinsic constraints on the third-order turbulent transport of F-s in the unstable atmospheric surface layer. When enforcing z independence of F-s on multilevel F-s measurements collected above different surface cover types, it is shown that increasing instability leads to a novel and universal description of (i) the imbalance between ejecting and sweeping eddy contributions to F-s and (ii) the ratio formed by a dimensionless turbulent transport of F-s and a dimensionless turbulent transport of scalar variance. When combined with structural models for the turbulent transport of F-s, these two findings offer a new perspective on closing triple moments beyond conventional gradient diffusion schemes. A practical outcome is a diagnostic of the constant flux assumption from single-level F-s measurements.


英文关键词constant flux layer asymmetric transport quadrant analysis turbulent flux transport
领域气候变化
收录类别SCI-E
WOS记录号WOS:000427564300038
WOS关键词BOUNDARY-LAYER ; COUNTERGRADIENT TRANSPORT ; MOMENTUM-TRANSFER ; WATER-VAPOR ; CLOSURE ; MODEL ; HEAT ; MOTION ; FLOWS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
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/26461
专题气候变化
作者单位1.Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA;
2.Duke Univ, Nicholas Sch Environm, Durham, NC USA;
3.Duke Univ, Dept Civil & Environm Engn, Durham, NC 27706 USA;
4.Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA
推荐引用方式
GB/T 7714
Li, Dan,Katul, Gabriel G.,Liu, Heping. Intrinsic Constraints on Asymmetric Turbulent Transport of Scalars Within the Constant Flux Layer of the Lower Atmosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(4):2022-2030.
APA Li, Dan,Katul, Gabriel G.,&Liu, Heping.(2018).Intrinsic Constraints on Asymmetric Turbulent Transport of Scalars Within the Constant Flux Layer of the Lower Atmosphere.GEOPHYSICAL RESEARCH LETTERS,45(4),2022-2030.
MLA Li, Dan,et al."Intrinsic Constraints on Asymmetric Turbulent Transport of Scalars Within the Constant Flux Layer of the Lower Atmosphere".GEOPHYSICAL RESEARCH LETTERS 45.4(2018):2022-2030.
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