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Title: Distinct Turbulence Structures in Stably Stratified Boundary Layers With Weak and Strong Surface Shear

Journal Article · · Journal of Geophysical Research: Atmospheres

Abstract Turbulence structures and exchange of momentum and heat in the nocturnal stable boundary layer (SBL) show distinct features under different stability conditions prompting interest in their connection. Here eddy covariance data collected at four different heights on a 62‐m meteorological tower over a large open flat terrain are used to characterize different SBL states and associated turbulence structures. In a SBL characterized by strong near‐surface winds, turbulent eddy sizes scale with their observational heights and the SBL experiences enhanced turbulent mixing of momentum and heat throughout (a state hereafter referred to as a “coupled” state). Conversely, in a decoupled SBL, weak winds occur near the surface and turbulent eddies are depressed and detached from the boundary leading to suppressed vertical mixing and layered SBL profiles. Because the transport of momentum and heat to the surface across SBL layers is determined by turbulent eddies, cross‐layer correlation and the aforementioned SBL coupling states can be delineated by distinct turbulence structures.

Research Organization:
Duke Univ., Durham, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0011461; DE‐SC‐0011461
OSTI ID:
1539760
Alternate ID(s):
OSTI ID: 1463184
Journal Information:
Journal of Geophysical Research: Atmospheres, Vol. 123, Issue 15; ISSN 2169-897X
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (3)

Evaluating multi-year, multi-site data on the energy balance closure of eddy-covariance flux measurements at cropland sites in southwestern Germany journal January 2019
Submeso Motions and Intermittent Turbulence Across a Nocturnal Low-Level Jet: A Self-Organized Criticality Analogy journal March 2019
The nocturnal boundary layer transition from weakly to very stable. Part II: Numerical simulation with a second‐order model
  • Maroneze, Rafael; Acevedo, Otávio C.; Costa, Felipe D.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 145, Issue 725 https://doi.org/10.1002/qj.3643
journal October 2019