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...

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Bibliographic Details
Main Authors: Lüpkes, Christof, Schlünzen, K Heinke
Format: Dataset
Language:English
Published: PANGAEA 1996
Subjects:
Event label
DATE/TIME
Latitude of event
Longitude of event
Elapsed time
Pressure, at given altitude
Temperature, air
Humidity, relative
Dew/frost point
Wind direction
HEIGHT above ground
Wind velocity, west-east
Wind velocity, south-north
Humidity, specific
Temperature, air, potential
Humidity, relative, with respect to ice
Dropsonde
REFLEX_II_P4
POLAR 4
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Antarctic
Arctic
Svalbard
Antarc*
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.857807
https://doi.pangaea.de/10.1594/PANGAEA.857807
Description
Summary: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 ... : 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 ...

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