Commit 13480691 authored by saeed's avatar saeed
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\section{Introduction}
In this study, we make a comparison between the wind data from the atmospheric model called AROME and the wind observation. The wind observations stem from mora database. The information on mora database can be found \href{http://mora-apps/}{here}.
The objective of this study is to investigate how well AROME performs in predicting the wind over the sea. This is of paramount importance in connection with the ocean circulation model such as NEMO ocean model when run in the forced mode. NEMO model is runs operationally in SMHI and give the sea surface, sea surface temperature, salinity and some other oceanic variables.
The objective of this study is to investigate how well AROME performs in predicting the wind over the sea. This is of paramount importance in connection with the ocean circulation model such as NEMO ocean model when run in the forced mode. NEMO model is runs operationally in SMHI and predicts the sea surface height, sea surface temperature, salinity and some other oceanic variables.
The model and observational data span from the January 1, 2018 to April 1, 2018 with a hourly resolution. Model data are in the grib format retrieved from mars archiving system.
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Inverse distance weighted (IDW) interpolation assumes that the points close to the observation point have more influence on that and the influence decreases further away from the observation point, determined by a defined weighted function such as the inverse of the distance between the observation point and the model point. The interpolation is done for both wind components in the west-east and south-north directions, namely ${u}$ and ${v}$ components.
Figure \ref{uwind} is an example of model data used in this study. It shows ${U}$ wind component. The latitude of model data is in a range $53.5$-${67.725}$ and their respective ongitude lies between ${7.0}$-${27.958}$.
Figure \ref{uwind}, showing ${U}$ wind component, is an example of model data used in this study. The latitude of model data is in a range $53.5$-${67.725}$ and their respective ongitude lies between ${7.0}$-${27.958}$.
\section{Observational data}
Observational data comes from mora database. We only use WMO stations located on the sea or close to the coast. Figure \ref{station} shows the location of the 64 mora stations on the sea. Note that not all these stations measure the wind exactly at the height 10 m above the ground. That is, we only use those stations having a height comparable to $10$ m. The wind data is retrieved from mora website in a json format. The json data are then processed and converted to CSV format, making them suitable to be compared to the model data.
\section{Results}
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