Wind forcing of the coastal circulation off north and northwest Iberia: Comparison of atmospheric models

Abstract This study examines the application of three different variations of linear-regression corrections to the surface marine winds from the Australian Bureau of Meteorology’s recently implemented operational atmospheric model. A simple correction over the entire domain is found to inadequately account for geographical variation in the wind bias. This is addressed by considering corrections that vary in space. Further, these spatially varying corrections are extended to vary in time. In an operational environment, the error characteristics of the wind forcing can be expected to change over time with the evolution of the atmospheric model. This in turn requires any applied correction to be monitored and maintained. Motivated by a desire to avoid this manual maintenance, a self-learning correction method is proposed whereby spatially and temporally varying corrections are calculated in real time from a moving window of historical comparisons between observations and preceding forecasts. This technique is shown to effectively remove both global and regionally varying wind speed biases.

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Wind-Waves Characteristics in the International Port of Algiers: Comparison of ALADIN and AROME’s Wind Effect

Journal of Atmospheric Science Research ◽

10.30564/jasr.v2i3.708 ◽

2019 ◽

Vol 2 (3) ◽

Author(s):

Sara CHIKHI ◽

Mohamed El-Amine Slimani

Keyword(s):

Wind Wave ◽

Wind Waves ◽

National Development ◽

Wave Model ◽

Wind Forcing ◽

Wind Effect ◽

Atmospheric Models ◽

The Stability ◽

Ocean Wind ◽

The Mediterranean Basin

The sea states numerical modeling has been developed for years, it used for very varied fields such as the sizing of coastal work, the safety of navigation, the study of the stability of the beaches or the water leisure. The spectral third-generation ocean wind-wave model WAVEWATCH III (WW3) software was adopted and developed for simulating wave propagation in the Mediterranean basin. In this study, a more detailed study was carried out on the port of Algiers. Two different atmospheric models have been used to get the wind forcing: ALADIN (Area Limited Dynamic Adaptation Inter National Development) with an 8 km resolution. And AROME (Application to Operational Research at Meso-scale) with a 3 km resolution. The results obtained using both of the atmospheric models have been compared and analyzed.

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Wind forcing effects on coastal circulation and eddy formation around a cape

Ocean Science Discussions ◽

10.5194/osd-7-207-2010 ◽

2010 ◽

Vol 7 (1) ◽

pp. 207-249 ◽

Cited By ~ 3

Author(s):

P. De Gaetano ◽

M. Burlando ◽

A. M. Doglioli ◽

A. A. Petrenko

Keyword(s):

Wind Stress ◽

Numerical Study ◽

Wind Forcing ◽

Open Boundary ◽

Coastal Circulation ◽

Ligurian Sea ◽

Eddy Formation ◽

Wind Regimes ◽

Coastal Flow

Abstract. This numerical study aims to assess the role of the wind stress and its resolution on the coastal circulation around the Promontorio of Portofino, a blunt cape in the Ligurian Sea (Northwestern Mediterranean). A high-resolution hydrodynamical numerical model, forced at the inflow open boundary by a coarser regional model, is run in three different configurations: no wind, 21-km and 7-km resolution winds. Moreover, the effect of using different values for the drag coefficient in the wind stress formulation is also tested. Sensitivity analysis of the mass transport and of the current velocity highlights that the greater effect of the wind is near the coast and the higher resolution wind forcing increases the intensity of a coastal countercurrent and of an eddy in the lee of the cape. A cluster analysis is performed to distinguish the main wind patterns and the main coastal flow patterns in the area under study for 2001–2003. It is shown that the typical wind regimes are coherent with the current ones highlighting the key role played by the wind in enhancing the coastal dynamics and the eddy formation around the cape.

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