期刊
GEOPHYSICAL RESEARCH LETTERS
卷 46, 期 24, 页码 14901-14911出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019GL085083
关键词
Kolmogorov's inertial subrange; turbulence; theory validation; marine atmospheric surface layer; air-sea interaction; field studies
资金
- Coupled Air-Sea Processes and Electromagnetic ducting Research (CASPER) project - U.S. Office of Naval Research under its Multidisciplinary University Research Initiative (MURI) [N0001419WX01369]
- Quantifying and Understanding Environmental Turbulence Affecting Lasers (QueTal) project - Directed Energy Joint Technology Office (DEJTO) [F2KBAB8159G002]
In 1941, Kolmogorov postulated that the energy distribution of turbulence, across a particular range of eddy sizes cascading to dissipation, could be uniquely described as a universal -5/3 power law. This theory was readily accepted as the basis for conceptualizing the phenomenological characteristics of turbulence and remains central to continued experimental and theoretical developments in turbulence study. However, the theory's own validity lacks final certainty. Here we present the first observation-based evaluation of Kolmogorov's power law within the atmospheric flow above the ocean. Using a unique platform and a novel analytical approach, we found that the expected power law varies systematically with height above the surface and the local environmental state. Our findings suggest that Kolmogorov's idealized value (-5/3) is approximately valid but, under certain conditions, may depend strongly on the unique processes and dynamics near the ocean surface. This discovery should motivate a reevaluation of how Kolmogorov's framework is applied to geophysical turbulence in the vicinity of the air-sea interface.
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