Meteorological measurements from 8 dropsondes released during POLAR 4 flight on 1993-03-04 along a track orthogonal to the pack ice edge north west of Svalbard

Different parameterizations of subgrid-scale fluxes are utilized in a nonhydrostatic and anelastic mesoscale model to study their influence on simulated Arctic cold air outbreaks. A local closure, a profile closure and two nonlocal closure schemes are applied, including an improved scheme, which is based on other nonlocal closures. It accounts for continuous subgrid-scale fluxes at the top of the surface layer and a continuous Prandtl number with respect to stratification. In the limit of neutral stratification the improved scheme gives eddy diffusivities similar to other parameterizations, whereas for strong unstable stratifications they become much larger and thus turbulent transports are more efficient. It is shown by comparison of model results with observations that the application of simple nonlocal closure schemes results in a more realistic simulation of a convective boundary layer than that of a local or a profile closure scheme. Improvements are due to the nonlocal formulation of the eddy diffusivities and to the inclusion of heat transport, which is independent of local gradients (countergradient transport).

Supplement to: Lüpkes, Christof; Schlünzen, K Heinke (1996): Modelling the arctic convective boundary-layer with different turbulence parameterizations. Boundary-Layer Meteorology, 79(1-2), 107-130

Identifier
DOI https://doi.org/10.1594/PANGAEA.857807
PID https://hdl.handle.net/10013/epic.46754.d001
Related Identifier https://doi.org/10.1007/BF00120077
Related Identifier https://doi.org/10.2312/BzP_0133_1994
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.857807
Provenance
Creator Lüpkes, Christof ORCID logo; Schlünzen, K Heinke
Publisher PANGAEA
Publication Year 1996
Funding Reference German Research Foundation https://doi.org/10.13039/501100001659 Crossref Funder ID 5472008 https://gepris.dfg.de/gepris/projekt/5472008 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 13192 data points
Discipline Earth System Research
Spatial Coverage (5.823W, 78.145S, 8.991E, 80.845N)
Temporal Coverage Begin 1993-03-04T11:56:52Z
Temporal Coverage End 1993-03-04T13:23:25Z