Journal
BOUNDARY-LAYER METEOROLOGY
Volume 148, Issue 2, Pages 419-436Publisher
SPRINGER
DOI: 10.1007/s10546-013-9817-y
Keywords
Air-sea interaction; Convective boundary layer; Inertial gravity waves; Marine atmospheric boundary layer; Resonance waves
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Funding
- Portuguese National Science Foundation [POCI/MAR/57265/2004, PPCDT/MAR/57265/2004]
- Fundação para a Ciência e a Tecnologia [POCI/MAR/57265/2004] Funding Source: FCT
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We focus on an island wake episode that occurred in the Madeira Archipelago region of the north-east Atlantic at . The Weather Research and Forecasting numerical model was used in a (one-way) downscaling mode, considering initial and boundary conditions from the European Centre for Medium-range Weather Forecasts system. The current literature emphasizes adiabatic effects on the dynamical aspects of atmospheric wakes. Changes in mountain height and consequently its relation to the atmospheric inversion layer should explain the shift in wake regimes, from a 'strong-wake' to 'weak-wake' scenario. Nevertheless, changes in sea-surface temperature variability in the lee of an island can induce similar regime shifts because of exposure to stronger solar radiation. Increase in evaporation contributes to the enhancement of convection and thus to the uplift of the stratified atmospheric layer above the critical height, with subsequent internal gravity wave activity.
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