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This study investigates the stratification regimes based on the relative strength of the forces that control the flow (i.e., buoyancy\u2010 or viscosity\u2010dominated flow) and the degree of turbulence anisotropy in large\u2010eddy simulations of the very SBL with weak winds. The simulations explored here correspond to an Ekman\u2010layer\u2010type boundary layer with geostrophic winds equal to  and 2 ms, and surface cooling rates of 1 and 3 Khr, at high latitude. According to the buoyancy Reynolds number  and the horizontal Froude number , these SBLs are in strongly stable conditions (i.e.,  and ). Moreover, the vertical profiles of  indicate that the turbulent flows are in an energetic state near the surface but gradually transition to a viscosity\u2010affected stratified state in the upper part of the SBL as viscous effects become important. For the most stable simulation, the results show that even the small scales are somewhat affected by buoyancy. The invariant analysis of the Reynolds stress anisotropy tensor shows that the flow is in an anisotropic state and is governed by the streamwise component of the turbulent flux  (one\u2010component turbulence). Additionally, based on the two\u2010point spatial correlation function, the shape of the large coherent turbulent structures is nearly isotropic in the vertical direction and anisotropic in the horizontal direction, and their size increases with height. The evaluation of the turbulent kinetic energy budget shows that the most stable simulation is in a non\u2010stationary state, which impacts the turbulence mixing efficiency measured by the flux Richardson number.<\/jats:p>","DOI":"10.1002\/qj.4280","type":"journal-article","created":{"date-parts":[[2022,4,6]],"date-time":"2022-04-06T04:55:36Z","timestamp":1649220936000},"page":"1824-1839","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Large\u2010eddy simulation of very stable boundary layers. Part II: Length scales and anisotropy in stratified atmospheric turbulence"],"prefix":"10.1002","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9459-031X","authenticated-orcid":false,"given":"Maria J.","family":"Chinita","sequence":"first","affiliation":[{"name":"Joint Institute for Regional Earth System Science and Engineering University of California Los Angeles  Los Angeles USA"},{"name":"Jet Propulsion Laboratory California Institute of Technology  Pasadena USA"},{"name":"Faculdade de Ci\u00eancias Instituto Dom Luiz, Universidade de Lisboa  Lisbon Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4024-4571","authenticated-orcid":false,"given":"Georgios","family":"Matheou","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering University of Connecticut  Storrs Connecticut USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4288-9456","authenticated-orcid":false,"given":"Pedro M. 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